Fire-Induced Progressive Damage
2016-12-28: Happy New Year to One and All !
SUSTAINABLE FIRE ENGINEERING
‘ The creative, person-centred and ethical Fire Engineering response, in resilient built form and smart systems, to the concept of Sustainable Human and Social Development – the many aspects of which must receive balanced and synchronous consideration.’
Organized by FireOx International (Ireland, Italy & Turkey), in joint collaboration with Glasgow Caledonian University’s School of Engineering & Built Environment (Scotland) … and having a widely multi-disciplinary attendance from the U.S.A., Hong Kong SAR (China), Spain, Finland, Scotland, Norway, Germany, England, The Netherlands and Ireland … SFE 2016 DUBLIN was a unique, and very successful, two-day gathering within the International Fire Engineering and Fire Service Communities.
The organizers are very grateful to our Supporters: CIB, FIDIC, iiSBE, and the UNEP’s Sustainable Buildings and Climate Initiative … and our Sponsor: Rockwool International.
SUSTAINABLE FIRE ENGINEERING fulfils a Critical Role in the realization of a Safe, Resilient and Sustainable Built Environment 4 ALL !
SUSTAINABLE FIRE ENGINEERING facilitates Positive Progress in implementing the United Nation’s 2030 Sustainable Development Agenda, which incorporates 17 Sustainable Development Goals and 169 Performance Targets !
SUSTAINABLE FIRE ENGINEERING fast-tracks Proper Compliance with the 7 Basic Performance Requirements – functional, fully integrated and indivisible – in Annex I of European Union Construction Products Regulation 305/2011 !
A NECESSARY & LONG OVERDUE TRANSFORMATION !
A Building is a permanent construction, complying with basic performance requirements and capable of being easily adapted … comprising structure, essential electronic, information and communication technologies (EICT’s), and fabric (non-structure) … having a minimum life cycle of 100 years … and providing habitable, functional and flexible interior spaces for people to use.
Building Users have a wide and varied range of abilities and behaviours … some having discernible health conditions and/or physical, mental, cognitive, psychological impairments … while others, e.g. young children, women in the later stages of pregnancy and frail older people, are also particularly vulnerable in user-hostile, inaccessible environments. Not everyone will self-identify as having an activity limitation because of the high level of social stigma associated with ‘disability’. Building designers and fire engineers must accept that building users have rights and responsible needs ; the real individual and group fire safety requirements of vulnerable building users must be given proper consideration by both design disciplines, working collaboratively together.
NOBODY LEFT BEHIND !
Following the savage 2008 Mumbai Hive Attack in India, and the more recent 2015 and 2016 Attacks in Europe, i.e. Paris, Brussels, Istanbul and Berlin … it is entirely wrong to assume that the main and/or only targets will be specific high-risk buildings types, i.e. Tall/High-Rise, Iconic, Innovative and Critical Function Buildings (refer to 2005 & 2008 NIST WTC 9-11 Recommendations). All buildings and adjoining/adjacent public spaces must be carefully assessed for the risk of direct or collateral involvement in an Extreme Man-Made Event.
It is a fundamental principle of reliable and resilient structural engineering that horizontal and vertical structural members/elements of construction are robustly connected together. All buildings must, therefore, be capable of resisting Disproportionate Damage. The restriction of this requirement, within some jurisdictions, to buildings of more than five storeys in height is purely arbitrary, cannot be substantiated technically … and ethically, must be disregarded.
Fire-Induced Progressive Damage is distinguished from Disproportionate Damage – a related but different structural concept – by the mode of damage initiation, not the final condition of building failure. This phenomenon is poorly understood. But, unless it is impeded, or resisted, by building design … Fire-Induced Progressive Damage will result in Disproportionate Damage … and may lead to a Collapse Level Event (CLE), which is entirely unacceptable to the general population of any community or society. All buildings must, therefore, be capable of resisting Fire-Induced Progressive Damage.
All buildings must also be carefully assessed for the risk of involvement in a Severe Natural Event, e.g. earthquakes, floods, landslides, typhoons and tsunamis.
In all of the above Risk Assessments … the minimum Return Period (also known as Recurrence Interval or Repeat Interval) must never be less than 100 years.
Reacting to surging energy, environmental and planetary capacity pressures … with accelerating climate change … Sustainable Buildings are now presenting society with an innovative and exciting re-interpretation of how a building is designed, constructed and functions … an approach which is leaving the International Fire Engineering and Fire Service Communities far behind in its wake, struggling to keep up.
Passive and Active Fire Protection Measures, together with Building Management Systems (whether human and/or intelligent), are never 100% reliable. Society must depend, therefore, on firefighters to fill this reliability ‘gap’ … and to enter buildings on fire in order to search for remaining or trapped building users. This is in addition to their regular firefighting function. Therefore, there is a strong ethical obligation on building designers, including fire engineers, to properly consider Firefighter Safety … should a fire incident occur at any time during the life cycle of a building.
Structural Serviceability, Fire Resistance Performance and ‘Fire Safety for All’ in a building must, therefore, be related directly to the local Fire Service Support Infrastructure … particularly in developing and the least developed countries. AND … Fire Codes and Standards must always be adapted to a local context !
The fire safety objectives of current Fire Codes and Standards are limited, usually flawed … and will rarely satisfy the real needs of clients/client organizations, or properly protect society. Fire code compliance, in isolation from other aspects of building performance, will involve a consideration of only a fraction of the issues discussed above. There is once again, therefore, a strong ethical obligation on building designers, including fire engineers, to clearly differentiate between the limited fire safety objectives in Fire Codes and Standards … and Project-Specific Fire Engineering Design Objectives … and to explain these differences to a Client/Client Organization. Facility Managers must also explain these differences directly to an Organization’s Senior Management … and directly inform the Organization’s Board of Directors … as appropriate.SFE Mission: To ensure that there is an effective level of Fire Safety for ALL – not just for SOME – in the Built Environment … to dramatically reduce all direct and indirect fire losses in the Human Environment … and to protect the Natural Environment.
4 Key SFE Concepts: Reality – Reliability – Redundancy – Resilience !
SFE Design Solutions: Are …
- Adapted to Local Context & Heritage ;
- Reliability-Based ;
- Person-Centred ; and
SFE SUBSIDIARY OBJECTIVES
- To transform Conventional Fire Engineering, as practiced today, into an ethical and fully professional Sustainable Design Discipline which is fit for purpose in the 21st Century … meaning … that fire engineers can participate actively and collaboratively in the sustainable design process, and can respond creatively with sustainable fire engineering design solutions which result in Effective Fire Safety for All in a Safe, Resilient and Sustainable Built Environment.
- To bring together today’s disparate sectors within the International Fire Engineering (and Science) Community … to encourage better communication between each, and trans-disciplinary collaboration between all.
- To initiate discussion and foster mutual understanding between the International Sustainable Development, Climate Change and Urban Resilience Communities … and the International Fire Engineering and Fire Service Communities.
1. 2016 Dublin Code of Ethics: Design, Engineering, Construction & Operation of a Safe, Resilient & Sustainable Built Environment for All. Download from: http://www.sustainable-firengineering.ie/sfe2016dublin/wp-content/uploads/2016/09/2016_Dublin-Code-of-Ethics.pdf
The realization of a Safe, Inclusive, Resilient & Sustainable Built Environment demands a concerted, collaborative, very creative and widely trans-disciplinary effort at national, local, regional and international levels across the whole planet – Our Common Home. The informed operation of appropriate legislation, administrative procedures, performance monitoring and targeting, and incentives/disincentives, at all of these levels, will facilitate initial progress towards this objective … but not the quantity, quality or speed of progress necessary. Our time is running out !
This Code of Ethics applies … for those who subscribe to its values … to policy and decision makers, and the many different individuals and organizations directly and indirectly involved in the design, engineering, construction, and operation (management and maintenance) of a Safe, Resilient & Sustainable Built Environment for All.
The Purpose of this Code of Ethics is to guide the work of competent individuals and organizations in a context where incomplete or inadequate legislation, administrative procedures and incentives/disincentives exist … but, more importantly, where they do not exist at all … and, amid much confusion and obfuscation of the terms, to ensure that implementation is authentically ‘sustainable’, and reliably ‘safe’ and ‘resilient’ for every person in the receiving community, society or culture … before it is too late !
2. Sustainable Fire Engineering Network … Join the LinkedIn SFE Group at https://www.linkedin.com/groups/8390667. Interested Individuals and Organizations are all very welcome.
And … Like the Facebook SFE Page at https://www.facebook.com/sfe2016/
3. New CIB W14: ‘Fire Safety’ Research Working Group VI Reflection Document: ‘Sustainable Fire Engineering Design, Construction & Operation’, which will establish a framework for the future development of Sustainable Fire Engineering.
Preparation of this Document will soon begin, and the following issues will be explored:
- Conceptual Framework for Sustainable Fire Engineering (SFE), with a necessary accompanying Generic SFE Terminology ;
- Strategy for Future SFE Development ;
- Implementation of 2005 & 2008 NIST WTC 9-11 Recommendations ;
- Fresh, New SFE Research Agenda ;
- Resilient Implementation of SFE Research Agenda.
4. SFE Website … http://www.sfe-fire.eu
5. SFE Twitter Accounts … @sfe2016dublin … and … @firesafety4all
2016-05-05: A Mickey Mouse Effort would be a polite way of describing the long drawn-out and tortuous process of implementing NIST’s Recommendations in the United States. A better description might be … FUBAR !
15 Years After the 2001 WTC 9-11 Attacks in New York City … absolutely nothing has been done concerning the implementation of a significant number of Recommendations … other Recommendations have been only partially implemented, with many being limited to application in buildings over 128m high (420 feet in ye olde silly imperial units of measure), or else buildings over 22.86m high (75 feet) which have an occupant load exceeding 5,000 people or are essential facilities, e.g. hospitals. And believe it or not, some implementing measures are still being challenged and they may yet be reversed in the years ahead. Forget about discussing the already narrow Fire Safety Objectives in building codes/regulations, or Protecting Society, etc., etc. In essence, it has all come down to that ‘durty’ four letter word: COST !
But read this 2011 Status Report for yourselves. I have kept in touch with the current situation over there.
NIST’s WTC 9-11 Recommendations Status Report (2011-08-08) – PDF File, 330 Kb
Why should this matter ?
In 2005 & 2008, the U.S. National Institute of Standards & Technology issued a series of very important [ critical ] Recommendations on badly needed revisions to the Design – Construction – Management – Firefighting Procedures for Very High/Tall Buildings, High-Risk Buildings, Iconic Buildings, and Innovatively Designed Buildings. Many, if not all, of these Recommendations were, and remain, just as valid and just as necessary in the case of other building types … whatever their height.
A lot of effort was expended here, a few years ago, on a detailed examination of the NIST Recommendations. In one respect, the Recommendations have become dated and obsolete. The recent 2016 Brussels and 2015 Paris Hive Attacks have altered how we must categorize and deal with buildings of ‘high-risk’. From the start, however, the disability-related Recommendations only concerned mobility impaired building occupants … a serious flaw.
NIST does not have the legal authority to implement its own Recommendations within the United States. However, implementation by the Model Code (e.g. IBC & NFPA) Organizations has been brutally slow and entirely inadequate.
And … it is very noticeable how so many other countries around the world are continuing to completely ignore NIST’s Recommendations. 9-11 never happened !
2015-11-06 ! We are very pleased to announce that the Fire Safe Europe Alliance … www.firesafeeurope.eu … has become actively involved, together with Glasgow Caledonian University and FireOx International, in co-hosting SFE 2016 DUBLIN. To facilitate the Network’s full engagement and provide sufficient time for promotion, etc … it was jointly agreed that the new dates for this Event shall be from 28-30 September 2016.
We have every confidence that SFE 2016 DUBLIN will now be a much better event … having a wider range of stakeholder participation.
Sustainable Fire Engineering – Effective Fire Safety for All in Sustainable Buildings !
28-30 September 2016 Dublin, Ireland
www.sustainable-firengineering.ie or www.sfe-fire.eu
Approved Regional Sustainable Built Environment Conference in the 2016-17 Series
The Gresham Hotel, O’Connell Street, Dublin, Ireland
Céad Míle Fáilte (Hundred Thousand Welcomes) to Dublin, in Ireland … and to the First International Conference devoted to this complex subject !
The 21st Century has had a cruel and savage birth: extreme man-made events, hybrid disasters, severe natural events, complex humanitarian emergencies, with accelerating climate change and variability. The old certainties are crumbling before our eyes …
The resolute Answer to these threats and the rapidly changing social and environmental needs of our world is Sustainable Fire Engineering !
• SFE fulfils a critical role in the realization of a Safe, Resilient & Sustainable Built Environment for All ;
• SFE facilitates positive progress towards the United Nation’s 17 Sustainable Development Goals & 169 Performance Targets, which were adopted in September 2015 ;
• SFE fast-tracks proper compliance with the Basic Requirements for Construction Works in the European Union’s Construction Products Regulation 305/2011 (Annex I), specifically the interlinked Requirements 7, 2, 1, 3 & 4.
INTRODUCTION to SFE 2016 DUBLIN
Fire Losses – both direct and indirect – amount to a very significant percentage of GDP in all economies, whether they are rich or poor … and result in enormous environmental damage and social disruption. Fire Engineering, including Fire Prevention and Protection in Buildings, is a major multi-billion Euro/Dollar component of the Construction Industrial Sector – worldwide.
Unfortunately … a fundamental conflict exists between Sustainable Building Design Strategies and the fire safety responses adopted in today’s Conventional Fire Engineering. To take a simple example: for cooling, heating or ventilation purposes in a Sustainable Building, it is necessary to take advantage of natural unobstructed patterns of air movement in that building. On the other hand, fire engineers in private practice and control personnel in Authorities Having Jurisdiction (AHJ’s) will demand that building spaces be tightly compartmented in order to limit the spread of fire and smoke … dramatically interfering with those natural patterns of air movement.
Unusual fire behaviour and a range of difficult fire safety issues (critical, in the case of firefighters) also arise from the Innovative Design Features (for example, ‘green’ roofs, elaborate intelligent façades) and Building Products / Systems (for example, photovoltaic panels) being installed in Sustainable Buildings.
A wide chasm separates the language and understanding of these two very different design disciplines. As a result, the performance of Sustainable Buildings can be seriously compromised. If, on the other hand, adequate independent technical control is absent on site … it is fire safety which is weakened.
And because, in most countries, the emphasis is placed on pre-construction design intent rather than the ‘real’ performance of the completed/occupied building … these problems are ignored and remain hidden … until a serious fire breaks out !
SUSTAINABLE FIRE ENGINEERING’s AIM
The Aim of Sustainable Fire Engineering is to dramatically reduce all direct and indirect fire losses in the Human Environment (including social, built, economic, environmental, virtual, and institutional) … and to protect the Natural Environment.
Towards Zero Preventable Fires in the Built Environment !
In essence … Sustainable Fire Engineering heavily front-loads Fire Prevention and Fire Protection Measures … above and beyond the minimal and very limited fire safety objectives mandated by current legislation.
SFE’s Key Concepts are … Reality – Reliability – Redundancy – Resilience !
SFE Design Solutions are …
- Adapted to local geography, climate change and variability, social need, economy, and culture ;
- Reliability-based ;
- Person-centred ;
SFE 2016 DUBLIN OBJECTIVES
1. To initiate discussion and foster mutual understanding between the International Sustainable Development / Climate Change / Urban Resilience Communities and the International Fire Science & Engineering Community.
2. To bring together today’s disparate Sectors within the International Fire Science and Engineering Community … to encourage better communication between each and trans-disciplinary collaboration between all.
3. To transform Conventional Fire Engineering into an ethical and fully professional Sustainable Design Discipline which is fit for purpose in the 21st Century … meaning … that fire engineers can participate actively in a sustainable design process, and can respond creatively with sustainable fire engineering design solutions which result in Effective Fire Safety for All in Sustainable Buildings.
4. To launch a CIB W14 Research Working Group VI Reflection Document: ‘Sustainable Fire Engineering Design & Construction’ … which will establish a framework for discussion on the future development of Sustainable Fire Engineering.
SFE 2016 DUBLIN WEBSITE
Download the Information on the Links Page … Review the wide range of Topics which will be examined and discussed at SFE 2016 DUBLIN … Submit an Abstract for a Paper … and Give serious consideration to becoming an Industry Exhibitor, or an Enlightened, Far-sighted Sponsor !!
2015-04-20: After a lengthy, constructive and very interesting discussion which resulted in some important text revisions … on Friday afternoon in Dublin, 10 April 2015, at the ‘Fire Safety for All’ Conference (www.fire-safety-for-all.eu) … all participants voted to adopt, support and promote the 2015 Dublin Declaration on ‘Fire Safety for All’ in Buildings !
With regard to International Distribution and Promotion of the Declaration … many readers of this Technical Blog belong to varied professional, social and business networks. I would earnestly ask you to circulate the Declaration widely within those networks, and to actively seek the support of as many organizations and individuals as possible. This support should be confirmed by means of a simple e-mail message to: firstname.lastname@example.org … and I will then add the names of supporters to the Fire Safety for All WebSite (www.fire-safety-for-all.eu). Copies of the Declaration, in PDF and WORD Formats, can also be downloaded from the WebSite.
This Benchmark Declaration on Accessibility and Fire Safety for People with Activity Limitations … is an essential reference document for all stakeholders and interested parties. It draws a long-awaited, broad, distinct and stable line in the shifting sands of a rapidly evolving Sustainable Human Environment (social, built, virtual, economic, and institutional) ….
1. As of 14 July 2015 … 156 Countries, plus the European Union, have ratified the United Nations Convention on the Rights of Persons with Disabilities (CRPD). Since the Convention became an international legal instrument in 2008, however, the UN CRPD Preamble’s Paragraph (g): ‘mainstreaming disability in sustainable development strategies’ … and Paragraph (v): ‘the importance of accessibility in enabling people to fully enjoy their rights and fundamental freedoms’ … have tended to receive insufficient public attention and scrutiny. The Dublin Declaration on ‘Fire Safety for All’ in Buildings and the related CIB W14 Research Working Group 5’s Reflection Document have been drafted with those two paragraphs very much in mind.
2. Although a situation of serious risk for vulnerable building users … it is not appropriate to deal with Fire Safety for All in Buildings under Article 11: ‘Situations of Risk & Humanitarian Emergencies’ of the U.N. Convention on the Rights of Persons with Disabilities … where situations of grave risk are handled, e.g. Extreme Man-Made Events, Hybrid Disasters, Severe Natural Events, Complex Humanitarian Emergencies … all amid Accelerating Climate Change & Variability.
Take the case of an earthquake, for example … where there will be large-scale serious building damage and many, many building collapses throughout an affected region. On the other hand, when considering fire safety for all in any building … it is necessary that the building shall remain not just structurally stable, but serviceable.
3. It is more appropriate, particularly since the publication of International Standard ISO 21542 (2011) with its expanded definition of Building Accessibility, that Fire Safety for All be incorporated into the meaning and implementation of Article 9: ‘Accessibility’ of the CRPD … in exactly the same manner that fire safety is fully integrated into everyday mainstream building use, and mainstream building fire safety codes and standards.
As there are no references, at all, to either ‘fire’ or ‘safety’ in Articles 9 … there is much to be explained and clarified in the 2015 Dublin Declaration on ‘Fire Safety for All’ in Buildings, if ‘real’ implementation is to be both practical and successful.
An improved and updated definition of Building Accessibility is contained in Principle 3 of the Dublin Declaration …
‘Accessibility of a Building encompasses the complete cycle of independent use, in a dignified manner and on an equal basis with others … and includes the approach, entry and use of a building and its facilities, egress during normal conditions and removal from its vicinity … and, most importantly, safe evacuation during a fire incident to a place of safety which is remote from the building and reached by way of an accessible route.’
4. The Dublin Declaration contains a Preamble, Principles 1-9 which are headlined below, and an Appendix with many Terms and Definitions …
Principle 1 – A Human Right
Principle 2 – Successful Implementation
Principle 3 – Building Accessibility
Principle 4 – Design for Safe Evacuation
Principle 5 – Accessible EICT’s
Principle 6 – Fire Safety Skills
Principle 7 – Reasonable Spatial Provision
Principle 8 – Building Management
Principle 9 – Firefighters
5. Existing approaches to Fire Safety, Protection & Evacuation in Buildings for People with Activity Limitations … as described and illustrated in the notable examples of British Standard B.S. 9999 (2008), Singapore’s FSR 7 (2011), and Hong Kong’s Fire Safety Code Addendum (2014) … are technically inadequate, tokenistic, discriminatory, create barriers to social participation, and violate human rights. Therefore, any further use or recourse to such existing approaches must be terminated immediately !
2015 DUBLIN DECLARATION ON ‘FIRE SAFETY FOR ALL’ IN BUILDINGS
A Call to Action and Successful Implementation !
(Adopted in Dublin, 2015-04-10)
Meeting In Dublin, Ireland … on Thursday and Friday, 9 and 10 April, 2015 …
In Co-Operation With the International Council for Research & Innovation in Building & Construction (CIB), Rehabilitation International’s International Commission on Technology & Accessibility (RI-ICTA), the Global Alliance for Accessible Technologies & EnvironmentS (GAATES), and the EUropean Concept for Accessibility Network (EuCAN) ;
Recognizing the integral and interdependent nature of the natural and human environments (social, built, virtual, economic and institutional) on this small planet Earth, our common home … and the need for harmonized principles to inspire and guide the peoples of the World in the enhancement of a human environment which cherishes the dignity, worth and many abilities of every person ;
Whereas in the United Nations Charter, the U.N. Member States pledged their respect for, and the protection and observance of, fundamental human and social rights … and have determined to promote social development and better standards of living for all ;
Recalling the Universal Declaration of Human Rights (UDHR), adopted on 10th December 1948 … which established a global framework of human and social rights – basic needs and protections – and fundamental freedoms for every person and communal gathering ;
Recalling Also the Rio de Janeiro Declaration on Sustainable Social Development, Disability & Ageing, adopted on 11th December 2004 … which stressed the importance of the social aspects in Sustainable Human & Social Development ;
Mindful Especially of the United Nations Convention on the Rights of Persons with Disabilities (CRPD), adopted on 13th December 2006 … the principal aim of which is to ensure that the human environment is sufficiently accessible to permit a vulnerable and major population group in all communities to safely exercise and enjoy the human and social rights and fundamental freedoms described in the 1948 UDHR ;
Working Towards the achievement of justice, equality of opportunity, social inclusion, active participation and development for every person with an activity limitation in all communities … and recognizing that accessibility of the human environment is an essential prerequisite for the above, and that fire safety for all is a critical life safety component of that accessibility ;
Aware Always of the universal reality that there is still a strong social stigma associated with disability and, particularly, mental ill-health … that much of the human environment is not accessible for all, and even where it is robustly mandated in law, the quality of that accessibility is poor … and that fire safety guidelines for people with activity limitations in buildings, if they exist, are inadequate and/or tokenistic, and rarely implemented ;
Welcoming the launch of the CIB Working Commission 14: Fire Safety – Research Working Group 5’s Reflection Document: Buildings & ‘Fire Incident Human Behaviour and Abilities’ which presents a practical examination and general overview of fire safety for all …
Addressed to every Country and the European Union – those many Voluntary Parties to the U.N. Convention on the Rights of Persons with Disabilities – and the Politicians, Authorities Having Jurisdiction, State Agencies, Professional Bodies & Institutions, Non-Governmental Organizations, Charitable & Private Organizations, etc., based within those separate jurisdictions:
We Declare That The Following Principles Must …
Be carefully studied, successfully implemented, and independently monitored … supported by Benchmarking, reliable Data and Statistics, and the informed use of pertinent Accessibility & Fire Safety Related Performance Indicators …
Principle 1 – A Human Right
Full and effective accessibility of the Human Environment (social, built, virtual, economic and institutional) is a fundamental human and social right, i.e. a basic need, for people with activity limitations – it is an essential prerequisite for the safe exercise and enjoyment of those rights, protections and freedoms set down in the 1948 Universal Declaration of Human Rights and subsequent international rights instruments … and crucially, for their health, participation, inclusion and development in all communities.
Principle 2 – Successful Implementation
Successful accessibility implementation … meaning high quality accessibility performance in the built environment … is reliant upon:
- A robust legal base mandating accessibility for all and fire safety for all ;
- Determined political will ;
- Sufficient public financial resources ;
- A compassionate and understanding bureaucracy at all levels ;
- Competent … meaning duly educated, trained and experienced in accessibility and fire safety design … spatial planners, architects, structural engineers, fire engineers, quantity surveyors, technical controllers, industrial designers, building managers, and people at all levels in construction organizations ;
- Independent monitoring of accessibility and fire safety performance ;
- Innovative, well-designed accessibility and fire safety related products and systems which can be shown to be ‘fit for their intended use’.
Principle 3 – Building Accessibility
Accessibility of a Building encompasses the complete cycle of independent use, in a dignified manner and on an equal basis with others … and includes the approach, entry and use of a building and its facilities, egress during normal conditions and removal from its vicinity … and, most importantly, safe evacuation during a fire incident to a place of safety which is remote from the building and reached by way of an accessible route.
Principle 4 – Design for Safe Evacuation
Accessibility design criteria must be infused into all of the practical, day-to-day work of building designers and, especially, in the development of project-specific fire engineering design objectives … and be applied from the initial stages of building design, through to the construction and reliable life cycle operation of vertical and horizontal fire evacuation routes facilitating contraflow, areas of rescue assistance, fire safety related signage, controls and fittings, fire prevention and protection measures, fire safety management procedures, routes to and locations of places of safety, etc., etc.
• Evacuation way finding in buildings must be intuitive and obvious ;
• 3 Keywords for building designers must be: reality – reliability – redundancy.
Principle 5 – Accessible EICT’s
Electronic, information and communication technologies are ubiquitous in today’s complex built and virtual environments. During a real fire incident in a building, they serve a function which is critical for the safety of all building users and firefighters, property protection, minimizing environmental damage and harm, and sustainability. For that reason, they must have a control and/or user interface which is accessible for all.
Principle 6 – Fire Safety Skills
People with activity limitations who occupy or use a building frequently must be included in all practice fire evacuations, in order to learn the skill of safe independent evacuation to an accessible place of safety remote from the building. During a real fire incident, evacuation assistance provided by other building users or rescue by firefighters, and the time spent waiting for that assistance or rescue in the building must be kept to an absolute minimum.
People with activity limitations must be actively encouraged to participate in fire safety preparatory planning and regular practices … and, without exception, must be consulted and included in all activities concerning their own evacuation from a building.
Management systems and fire protection measures in buildings are never 100% reliable. People with activity limitations must, therefore, be actively encouraged to be self-aware in situations of risk, and facilitated in learning the skill of self-protection.
Principle 7 – Reasonable Spatial Provision
Reasonable spatial provision must be allocated in a building for the needs of real users, who vary in the range of their individual behaviour and abilities … and for the real building user population profile which, avoiding discrimination, must reflect a society as a whole. Concerning fire safety for all and the necessary size, for example, of an area of rescue assistance which adjoins a fire evacuation staircase on every floor in a building … the following indicators, exclusive of extra provision for assistants, must guide the architect and fire engineer in the collaborative design process:
(a) Minimum reasonable provision for people with disabilities in a building – 10% of design occupant/user population ;
(b) Minimum reasonable provision for people with activity limitations in a building … 15% of design occupant/user population.
Principle 8 – Building Management
Building managers must ensure that fire safety for all preparatory planning is effective, and that practices are held regularly … before any real fire incident occurs. And as part of their normal, day-to-day functioning … managers must be fully aware that, without due attention to accessibility-related services, product maintenance and occupant/user welfare policies, the quality of accessibility in a building will rapidly deteriorate.
Personal Emergency Evacuation Plans (PEEPS) must not be used to limit or restrict access to any part of a building and its facilities.
Principle 9 – Firefighters
Firefighters must be trained to interact with and rescue people with activity limitations from buildings, using procedures and equipment which will not cause injury to either. Fire services must ensure that they operate such procedures and possess such regularly serviced equipment.
Emergency service organizations must operate reliable systems to notify the fire services of emergency situations, which are accessible for all and useable by the public at all times.
APPENDIX – Terms & Definitions
Area of Rescue Assistance: A sufficiently large building space directly adjoining, and visible from, a main vertical evacuation route – robustly and reliably protected from heat, smoke and flame during and after a fire – where people may temporarily wait with confidence for further information, instructions, and evacuation assistance or rescue, without obstructing or interfering with the evacuation travel of other building users.
Contraflow Circulation in a Fire Building: Emergency access by firefighters or rescue teams into a building and towards a real fire … while building users are still moving away from the fire and evacuating the building.
Evacuation from a Fire Building: To withdraw, or cause to withdraw, all users from a building which is on fire … in pre-planned and orderly phased movements to an accessible place of safety remote from the building.
Fire Compartmentation: The division of a building into fire-tight compartments by fire, smoke and heat resisting elements of construction, in order to …
a) contain an outbreak of fire, including any smoke and heat generated by the fire ;
b) prevent damage, within the building, to other adjoining compartments and spaces ;
c) protect a compartment interior from external fire attack, e.g. fire spread across the building’s facade or from an adjacent building ;
d) minimize adverse, or harmful, environmental impacts outside the building.
Human Health: A state of complete physical, mental and social wellbeing, and not merely the absence of disease or infirmity.
People with Activity Limitations (E) / Personnes à Performances Réduites (F): Those people, of all ages, who are unable to perform, independently and without aid, basic human activities or tasks – because of a health condition or physical / mental / cognitive / psychological impairment of a permanent or temporary nature.
The above Term includes …
- wheelchair users ;
- people who experience difficulty in walking, with or without a facilitation aid, e.g. stick, crutch, calliper or walking frame ;
- frail, older people ;
- the very young (people under the age of 5 years) ;
- people who suffer from arthritis, asthma, or a heart condition ;
- the visually and/or hearing impaired ;
- people who have a cognitive impairment disorder, including dementia, amnesia, brain injury, or delirium ;
- women in the later stages of pregnancy ;
- people impaired following the use of alcohol, other ‘social’ drugs e.g. cocaine and heroin, and some medicines ;
- people who suffer any partial or complete loss of language related abilities, i.e. aphasia ;
- people impaired following exposure to environmental pollution and/or other irresponsible human activities, e.g. war and terrorism ;
- people who experience a panic attack in a real fire situation or other emergency ;
- people, including firefighters, who suffer incapacitation as a result of exposure, during a real fire, to smoke and poisonous or toxic substances, and/or elevated temperatures.
Place of Safety:
• Any accessible location beyond a perimeter which is  metres from the fire building or a distance of  times the height of such building, whichever is the greater ; and
• Where necessary triage can safely be rendered … and from where effective medical care and supervision can be organized and provided within one hour of injury (the ‘golden hour’) ; and
• Where people can be identified.
Note: If there is a risk of an explosion associated with a fire – multiply the numbers in square brackets above by 4.
Progressive Damage in Fire / Fire-Induced Progressive Damage: The sequential growth and intensification of structural deformation and displacement, beyond fire engineering design parameters, and the eventual failure of elements of construction in a building – during a fire and the ‘cooling phase’ afterwards – which, if unchecked, will result in disproportionate damage, and may lead to total building collapse.
Note: Fire-induced progressive damage may commence long before there is any breach in the integrity of a fire compartment’s boundaries.
Real Fire: A fire which develops in a building and is influenced by such factors as the type of building and its occupancy (numbers, abilities and activities) ; the combustible content (fire load) ; the ventilation, geometry and thermal properties of the fire compartment or building space (should no fire compartmentation exist) ; the fire suppression systems in the building, and the actions of firefighters.
Skill: The ability of a person – resulting from proper training and regular practice – to carry out complex, well-organized patterns of behaviour efficiently and adaptively, in order to achieve some end or goal.
Social Environment: The complex network of real and virtual human interaction – at a communal or larger group level – which operates for reasons of tradition, culture, business, pleasure, information exchange, institutional organization, legal procedure, governance, human betterment, social progress and spiritual enlightenment, etc.
Social Rights: Rights to which an individual person is legally entitled, e.g. the right to free elementary education (Art.26(1), UDHR), but which are only exercised in a social context with other people, and with the active support of a competent legal authority, e.g. a Nation State.
Social Wellbeing: A general condition – in a community, society or culture – of health, happiness, creativity, responsible fulfilment, and sustainable development.
Virtual Environment: A designed environment, electronically generated from within the built environment, which may have the appearance, form, functionality and impact – to the person perceiving and actually experiencing it – of a real, imagined and/or utopian world.
2014-08-28: Earlier this month … the final straw … as I caught up on a ‘piece’ in McGraw Hill’s Architectural Record … which reproduced an original, intriguing article from designMENA.com, posted on 12 August 2014, by Nick Ames …
Rebel Architects Star In New TV Show
Qatar-based broadcaster Al Jazeera is to show a series of films focusing on radical architects from Pakistan, Brazil, Nigeria, Spain, Palestine and Vietnam. The series – entitled ‘Rebel Architecture’ – focuses on architects using design to confront urban, environmental and social problems in their communities.
Dan Davies, producer of the series, said: “We couldn’t help noticing that despite all the problems afflicting humanity, many of which architecture uniquely has the ability to assist and even solve, most of the mainstream and architectural press celebrates the aesthetics of huge iconic projects, marvelling at insanely complicated ways to fold giant sheets of metal.”
“As we face issues from floods and natural disasters to an explosion of urban populations, soaring inequality and displacement through conflict, architecture seems wholly absent. So we wanted to look beyond the discussion of the aesthetics of Star-chitecture and see what architects outside the mainstream are doing.”
The six-part series, which starts on 18 August, begins with a film documenting the work of Spanish architect Santiago Cirugeda, who uses his knowledge of planning law to occupy abandoned properties and to build structures on unused land.
It also features Pakistani architect Yasmeen Lari, who designs disaster relief shelters and Eyal Weizman, professor of spatial and visual cultures at Goldsmiths University, who explores the way the built environment is used as an instrument of occupation.
In Vietnam, the series follows Vo Trong Nghia, whose projects focus on open spaces and sustainable design, while in Nigeria, Kunlé Adeyemi has designed floating buildings to solve issues of flooding and overcrowding.
The final episode explores Rocinha, the largest favela in Brazil, with builder Ricardo de Oliveira, and master planner Luis Toledo.
“The rebel architects have to push boundaries, but they must also look beyond their own buildings,” said Davies. “They start by looking at the wider context in which they live – be it Spain hit by the financial crisis, or Pakistan ravaged by floods – and work out how they can change the status quo with architecture.”
I SAY …
Shouldn’t every Architect be concerned about the issues raised in Nick’s article ? And if not … why not ??
Architecture is a wide and complex field of human creative, artistic and scientific endeavour. Yet in the international and national media, both mainstream and architectural … it does appear, as presented, to be narrowly confined to the “aesthetics of huge iconic projects”, and “insanely complicated ways to fold giant sheets of metal”. And the various media continue to focus on and enthusiastically applaud the current, outrageous phallic skyscraper contest in, for example, the Arab Gulf Region, China and South-East Asia … a contest which is actively promoted by such international organizations as the US-based Council on Tall Buildings & Urban Habitat. [ I might add … with entirely insufficient attention being paid to fire safety, resilience and sustainability in those Super-Tall Buildings !! ]
If Santiago Cirugeda, Yasmeen Lari, Eyal Weizman, Vo Trong Nghia, Kunlé Adeyemi, Ricardo de Oliveira, and Luis Toledo are indeed Rebels … [ I would argue that they most definitely are not ] … and each one is working in isolation … then we must urgently instigate a Revolution …
Creative Architecture In Context !!
PRINCIPAL BARRIER …
The Institutional Framework of Today’s Conventional Architecture … typically developed to promote and protect a 19th Century Model of Architectural Practice … exerts a powerful stranglehold over the architectural profession and the schools of architecture in many countries. It is no longer ‘fit for purpose’ in the 21st Century !
Here in Ireland … a few days before reading the Nick Ames article … I attended a long Extraordinary General Meeting of the Royal Institute of the Architects of Ireland (RIAI) … called by 10 Institute Members to demand urgent, concerted action from the Institute’s Council in response to the new and very flawed Building Control Amendment Regulations (Statutory Instruments Nos.9 & 105 of 2014), which came into effect from 1 March 2014.
Far from being an enlightening and pleasurable occasion … for many small reasons, it was annoying and frustrating. The biggest reason of all, however, was that I saw no evidence whatever that either Council or the Membership understands the simple, fundamental truth that … self-regulation/self-certification does NOT work !
Refer back to my previous post.
The General Public in Ireland … also known as ‘The Long-Suffering Consumer’ … does not trust the Medical and Legal Professions to self-regulate, despite the vociferous protestations from both that their internal regulatory systems are packed-packed-packed with civilians. Yes … ‘selected’ civilians !
That particular evening in the Davenport Hotel, Dublin … the RIAI’s Extraordinary General Meeting (EGM) went nowhere … aided and abetted by Council Members at the head table. It was interesting to note that none of the 10 Institute Members who had called the meeting had a seat at that same table.
As we exit the Profound Economic Crisis following the Extravagant Celtic Tiger Years … and coldly look around us … we witness an architectural profession lost in a contextual wilderness – urban, environmental and social – while fumbling around in a legal and political maze. And, every day, we experience a sprawling, ugly, depressing and unsustainable built environment which is engaged in a sad and brutal conflict with nature.
It has taken at least a generation … but the RIAI has directly overseen the slow and progressive dilution of what it means to be an Architect in Ireland.
Time for The Revolution … To The Barricades !!
2014-05-16: Anybody with even the slightest interest in the Future Development of Fire Engineering Design, and Structural Fire Engineering in particular, should pay attention to the proceedings of an upcoming CIB/NIST Workshop, which will be held on 21-22 May 2014, at the NIST Campus in Maryland, USA …
It is essential to read 3 White Papers … produced by three separate teams of experts, contracted by NIST, in advance of the Workshop … to get a ‘real’ flavour of how discussions may, or may not, develop next week. All three papers are available to download from the NIST WebSite (and the links below). I suggest that you get your hands on them … ASAP !
1. Fire Behaviour of Steel Structures (March 2014). 20 Pages, 786 Kb.
2. State-of-the-Art on Fire Resistance of Concrete Structures: Structure-Fire Model Validation (March 2014). 32 Pages, 1.26 Mb.
3. Fire Resistance of Timber Structures (March 2014). 20 Pages, 998 Kb.
After reading these 3 NIST White Papers … I was not surprised by the large number of ‘unknowns’, or the enormous gaps in our ‘knowns’ …
Taken in whole and all together, however, the three documents are a public confirmation that today’s general practice of Fire Engineering is more akin to that of mid-19th Century Alchemy. Blinkered practitioners are isolated from the building design process … because they have no understanding of that process, and have no means of effective communication with the many other design disciplines involved. And minimal, i.e. ‘cost-effective'(?), compliance with the limited and inadequate fire safety objectives in current building codes/regulations is widely regarded as the one and only target for their efforts … a minor one compared to the fundamental, long-term target of realizing a Safe, Resilient and Sustainable Built Environment for All. At the same time, frontline fire service personnel are forced to operate on shoestring budgets … and, when a fire emergency inevitably occurs, they are regarded as nothing more than an expendable resource.
!! Structure … Does Not A Building Make !!
Some comments on the 3 NIST White Papers …
A. The Papers contain a number of important technical errors:
- A similar Introduction in two of the Papers refers only to the 2005 NIST Report (NCSTAR 1) on the 9-11 Collapse of WTC Buildings 1 & 2 in New York City, which contained 30 Recommendations. However, NIST published a later Report in 2008 (NCSTAR 1A) on the Collapse of WTC Building 7, which contained a further 13 Recommendations … 1 new, and 12 revised/updated from the earlier 2005 Report.
- There is a reference in one of the Papers to a 1989 European Directive on Construction Products (89/106/EEC), and as later amended. This Directive was repealed, in 2011, by Article 65 of the new European Union (EU) Regulation No.305/2011 on Construction Products. Unlike a Directive, a Regulation is addressed directly to the EU Member States, and does not permit any flexibility with regard to national implementation. Annex I of Regulation 305/2011 sets out 7 Basic Requirements for Construction Works:
– Mechanical resistance and stability ;
– Safety in case of fire ;
– Hygiene, health and the environment ;
– Safety and accessibility in use ;
– Protection against noise ;
– Energy economy and heat retention ;
– Sustainable use of natural resources.
Concerning fire safety in buildings … it is incorrect to state, or even suggest, that only the second Basic Requirement is relevant … a building must satisfy all of the Basic Requirements taken together, i.e. the 7 Basic Requirements are inter-dependent.
B. Having carefully read the Papers … none of the expert teams appear to have paid any attention to any of the NIST Recommendations, in either the 2005 or the 2008 Reports ! Note well that two separate series of posts on both sets of NIST Recommendations have been carried here on this Technical Blog.
C. If we have learned anything from the WTC 9-11 Building Collapses, it is that the Fire Engineer must be able to communicate effectively with other mainstream building design disciplines … especially ‘ambient’ structural engineers who speak the language of Structural Reliability, Limit State Design and Serviceability Limit States. The Fire Engineer must also become an active participant in the creative, trans-disciplinary process of design. These issues have not been seriously considered in any of the Papers.
D. All of the Papers lack a common and precise starting point … relevant structural fire engineering concepts are either not defined or badly defined … and the ‘dynamic, complex architectural interaction between a building’s structure and fabric under conditions of fire’ requires immediate and urgent investigation …
The ability of a structural system to fulfil its design purpose, for a specified time,
under the actual environmental conditions encountered in a building.
Structural Fire Engineering
Those aspects of fire engineering concerned with structural design for fire …
and the dynamic, complex architectural interaction between a building’s structure and
fabric, i.e. non-structure … under conditions of fire and its immediate aftermath,
including but not confined to the ‘cooling phase’.
Fire-Induced Progressive Damage
The sequential growth and intensification of structural deformation
and displacement, beyond fire engineering design parameters*, and the eventual failure
of elements of construction in a building – during a fire and the ‘cooling phase’
afterwards – which, if unchecked, will result in disproportionate damage,
and may lead to total building collapse.
[ *fire serviceability limit states ]
The failure of a building’s structural system:
(i) remote from the scene of an isolated overloading action ;
and (ii) to an extent which is not in reasonable proportion to that action.
[ Fire-Induced Progressive Damage and Disproportionate Damage are fundamental concepts in the Fire Engineering Design of All Buildings ! ]
E. It is not acknowledged in any of the Papers that the Fire Safety Objectives in Current Building Codes/Regulations are, of necessity, limited in scope … and entirely inadequate in the context of Annex I in EU Regulation 305/2011, and the long-term goal of realizing a Safe, Resilient and Sustainable Built Environment for All. Refer to the updated Scope, Aims & Objectives of CIB Working Commission 14: ‘Fire Safety’.
F. Once and for all … use of the term Fire Resistance (and any number of variations thereof, e.g. resistant, resisting, resistive, etc.) in connection with any aspect of structural performance in fire … is ridiculous ! It is roughly comparable to use of the term Fire Proof during the first half of the 20th Century.
G. Finally, for now … the current unwise focus on Crude Pass/Fail Results from the ‘standard fire’ testing of single loadbearing structural elements must evolve … must be transformed into the more detailed and precise measurement of all aspects of ‘real’ structural system performance over the full duration of a ‘design’ fire (including the cooling phase afterwards) … using a much wider range of performance monitoring equipment, e.g. short wave infra-red thermography.
It is no longer acceptable for Fire Engineering to exist in an isolated Twilight Zone … completely removed from the everyday realities of Mainstream Building & Construction.
2014-04-20: Traditional/Conventional Fire Engineering Practice is slowly, but inevitably, being transformed … in order to meet the regional and local challenges of rapid urbanization and climate change, the pressing need for a far more efficient and resilient building stock, and a growing social awareness that ‘sustainability’ demands much greater human creativity …
Design Target: A Safe, Resilient and Sustainable Built Environment for All
Design Key Words: Reality – Reliability – Redundancy – Resilience
Essential Construction & Occupancy Start-Up Processes: Careful Monitoring & Reporting – Independent Verification of Performance (MRV)
Sustainable Fire Engineering Design Solutions:
Are Reliability-Based …
The design process is based on competence, practical experience, and an understanding of ‘real’ building performance and resilience during Extreme Man-Made Events, e.g. 2001 WTC 9-11 Attack & 2008 Mumbai Hive Attacks, and Hybrid Disasters, e.g. 2011 Fukushima Nuclear Incident … rather than theory alone.
Are Person-Centred …
‘Real’ people are placed at the centre of creative design endeavours and proper consideration is given to their responsible needs … their health, safety, welfare and security … in the Human Environment, which includes the social, built, economic and virtual environments.
Are Adapted to Local Context & Heritage * …
Geography, orientation, climate (including change, variability and severity swings), social need, culture, traditions, economy, building crafts and materials, etc., etc.
[* refer to the 2013 UNESCO Hangzhou Declaration]
In Sustainable Design … there are NO Universal Solutions !
To protect society, the best interests of the client/client organization and building user health and safety, and to maintain functionality under the dynamic, complex conditions of fire … Project-Specific Fire Engineering Design Objectives shall cover the following spectrum of issues …
- Protection of the Health and Safety of All Building Users … including people with activity limitations (2001 WHO ICF), visitors to the building who will be unfamiliar with its layout, and contractors or product/service suppliers temporarily engaged in work or business transactions on site ;
- Protection of Property from Loss or Damage … including the building, its contents, and adjoining or adjacent properties ;
- Safety of Firefighters, Rescue Teams and Other Emergency Response Personnel ;
- Ease and Reasonable Cost of ‘Effective’ Reconstruction, Refurbishment or Repair Works after a Fire ;
- Sustainability of the Human Environment – including the fitness for intended use and life cycle costing of fire engineering related products, systems, etc … fixed, installed or otherwise incorporated in the building ;
- Protection of the Natural Environment from Harm, i.e. adverse impacts.
More Specifically … with Regard to Resilient Building Performance during a Fire Incident and the ‘Cooling Phase’ after Fire Extinguishment:
1. The Building shall be designed to comply with the Recommendations in the 2005 & 2008 NIST(USA) Final Reports on the World Trade Center(WTC) 1, 2 & 7 Building Collapses.
In one major respect, the 2005 NIST Report is flawed, i.e. its treatment of ‘disability and building users with activity limitations is entirely inadequate. The Building shall, therefore, be designed to comply with International Standard ISO 21542: ‘Building Construction – Accessibility & Usability of the Built Environment’, which was published in December 2011.
2. The Building shall remain Serviceable, not just Structurally Stable(!) … until all buildings users (including those users with activity limitations waiting in ‘areas of rescue assistance’) have been evacuated/rescued to an accessible ‘place of safety’ which is remote from the building, and have been identified … and all firefighters, rescue teams and other emergency response personnel have been removed/rescued from the building and its vicinity.
The Building shall be designed to resist Fire-Induced Progressive Damage and Disproportionate Damage. These requirements shall apply to all building types, of any height.
Under no reasonably foreseeable circumstances shall the Building be permitted to collapse !
3. The Building shall be designed to comfortably accommodate and resist a Maximum Credible Fire Scenario and a Maximum Credible User Scenario.
Concerted International Research is Needed …
To creatively resolve the direct conflict which exists between Sustainable Building Design Strategies and Traditional/Conventional Fire Engineering.
An example … for cooling, heating and/or ventilation purposes in a sustainable building, it is necessary to take advantage of natural patterns of uninterrupted air movement in that building. On the other hand, fire consultants in private practice, and fire prevention officers in authorities having jurisdiction, will demand that building spaces be strictly compartmented in order to limit the spread of fire and smoke … thereby dramatically interfering with those natural patterns of air movement. The result is that the sustainability performance of the building is seriously compromised.
If, however, adequate independent technical control is absent on the site of a sustainable building … it is the fire safety and protection which will be seriously compromised !
To effectively deal with the fire safety problems (fatal, in the case of firefighters) which result from the installation of Innovative Building/Energy/EICT Systems and Products in Sustainable Buildings.
These are appropriate tasks for a new CIB W14 Research Working Group VI: ‘Sustainable Fire Engineering Design & Construction’ !
2012-12-14 & 2012-12-30: Further to this distressing incident … which exposed a profound lack of awareness, care and competence within the general fire safety industrial sector …
… this is how we would like to help you … whether you are an individual, or an organization … whether you are located in Ireland, Italy or Turkey … some other part of Europe, the Arab Gulf Region, India, Japan, China … or wherever !
And … we can, if requested or necessary, work in collaboration with local partners in those different geographical regions.
– FireOx International is the Fire Engineering Division of Sustainable Design International Ltd. (SDI) –
Fundamentally, the 9-11 World Trade Center Incident in New York (2001) was an Extreme ‘Real’ Fire Event. It presented the International Fire Engineering Community with a catastrophic failure in conventional practices and procedures related to:
- Fire Engineering, Structural Engineering, and Architectural Design ;
- Human Building Management Systems ;
- Emergency Response by Firefighters, Rescue Teams, and Medical Personnel ;
- National and Local Organizations Having Authority or Jurisdiction (AHJ’s) ;
… and with the serious problem of entirely inadequate Fire Safety Objectives in the building legislation, model codes and design standards of the most economically advanced countries in the world.
Those people who understand the building design process, and have experience as construction practitioners, have long realised that the lessons from 9-11 must be applied across the full spectrum of building types … not just to tall buildings. Right up to the present day, unfortunately, many people in the International Fire Engineering Community are either unwilling, or unable, to do this.
Furthermore … Fire Engineering, Architectural Design and Structural Engineering must, of urgent necessity, be seamlessly conjoined … with the aim of removing misunderstandings and the wide gaps in client service delivery between the different disciplines.
In 2002, a series of Long-Term 9-11 Survivor Health Studies commenced in the USA … and in 2005 and 2008, the U.S. National Institute of Standards and Technology (NIST) issued a series of Post 9-11 Critical Recommendations concerning the design, construction, management and operation of buildings.
At FireOx International … we have fully integrated this essential design guidance into our frontline fire engineering and architectural practice … we have developed unique and practical solutions for worldwide application, some of which appear in International Standard ISO 21542: ‘Building Construction – Accessibility & Usability of the Built Environment’, published in December 2011.
FireOx International’s Commitment to You
As a necessary response to the New 21st Century Paradigm of Real Extreme Event in a Built Environment which is becoming more and more complex … is subject to climate change and severe weather events … and is vulnerable to malign and malevolent disruption –
WE are committed to … the implementation of a Sustainable Human Environment which is Fire Safe and Secure for All, meaning that an ‘appropriate project-specific fire safety level’ is our fire engineering objective, with ‘human health protection’ targeted as a priority … through the use of innovative, reliability-based and person-centred sustainable design practices and procedures.
What is an ‘Appropriate Fire Safety Level’ in Your Building or Facility ?
It is rarely, if ever, explained to clients/client organizations that the Minimal Fire Safety Objectives in building legislation are focused solely on protecting the ‘interests’ of society, not those of the individual … are, quite often, inadequate and/or flawed … and are, always, revised only after the latest tragedy !
To properly protect Your Interests as a client/client organization … we strongly advise that the Appropriate Level of Fire Safety in Your Building or Facility should exceed the minimal level of safety required by building legislation. We would also caution that, in many jurisdictions (e.g. India), compliance with national building legislation is voluntary.
Which raises the issues of whether or not you will actually get what you pay for, and whether or not the Fire Protection Measures in Your Building or Facility are reliable (in other words, will they perform as intended at the time of a ‘real’ fire, which may occur at any time in a building’s long life cycle) !?! Competent Technical Control of Design and Construction, independent of the design and construction organization(s), is essential.
You should carefully consider the following spectrum of issues which may be directly relevant to Your Project. Following a process of consultation with you, we then develop Project-Specific Fire Engineering Design Objectives … bearing in mind that you must also comply with safety at work, anti-discrimination, and environmental legislation, etc … maintain business continuity, etc … be energy efficient, etc … and be socially responsible, etc …
– Protection of the Health of All Building Users … including People with Activity Limitations (2001 WHO ICF), Visitors to the building or facility who may be unfamiliar with its layout, and Contractors or Product/Service Suppliers temporarily engaged in work or business transactions on site ;
– Protection of Property from Loss or Damage … including the Building or Facility, its Contents, and Adjoining or Adjacent Properties ;
– Safety of Firefighters, Rescue Teams and Other Emergency Response Personnel ;
– Ease and Reasonable Cost of ‘Effective’ Reconstruction, Refurbishment or Repair Works after a Fire ;
– Sustainability of the Human Environment (social – built – virtual – economic) … including Fitness for Intended Use and Life Cycle Costing of fire engineering related products and systems, etc … fixed, installed or otherwise incorporated in the building or facility ;
– Protection of the Natural Environment from Harm, i.e. Adverse or Damaging Impacts.
FireOx International – Our Fire Engineering Services
WE will advise you on Fire Safety Policy, Fire Safety Strategy Development, Fire Safety Implementation … and, whether you are within or from outside the European Union, on CE Marking of Fire Protection Related Construction Products ;
WE understand the process of Design, particularly the new language of Sustainable Design … and we will produce Creative Fire Engineering Solutions for Your Project ;
WE are thoroughly familiar with the intricacies of Building Sites … and we will verify and/or validate Design Compliance during construction, and at project completion … and, if requested or necessary, as a completely Independent Technical Controller ;
WE communicate easily and effectively with other Professional Design Disciplines, including architects and structural engineers … and we will act as fully participating members of Your Project Design & Construction Team … and, if requested or necessary, as the Design Professional in Responsible Charge ** ;
WE practice in accordance with a comprehensive Professional Code of Ethics.
Sustainable Fire Engineering Solutions ?
- Are adapted to Local Geography, Climate/Climate Change, Social Need, Culture, Economy … and Severe Events (e.g. earthquakes, flooding) ;
- Are ‘Reliability-Based’, i.e. that design process based on practical experience, competence and an examination of real extreme events, e.g. 2001 WTC 9-11 & 2008 Mumbai Attacks, and 2011 Fukushima Nuclear Incident … rather than theory alone ;
- Are ‘Person-Centred’, i.e. that design process which places ‘real’ people at the centre of creative endeavours and gives due consideration to their responsible needs, and their health, safety, welfare and security in the Human Environment.
FireOx International’s Contact Information
International Phone: +353 1 8386078 / National Phone: (01) 8386078
Important Note: This Post should be read in conjunction with an earlier Post …
It is there, not here, that we define Sustainable Human & Social Development … and describe how our Practice is responding to this open, intricate, dynamic, and still evolving concept. The resulting transformation in how frontline services are provided to our Clients/Client Organizations ensures a much more comfortable ‘fit’ to their needs … and a greater level of protection, safety and security for society !
[ ** 2005 NIST(USA) Final Report on 9-11 World Trade Center 1 & 2 Tower Collapses
– Footnote 49 –
… the Design Professional in Responsible Charge – usually the lead architect – ensures that the (Design) Team Members use consistent design data and assumptions, co-ordinates overlapping specifications, and serves as the liaison with enforcement and review officials, and with the client or client organization. ]
2012-10-25: The Practice Philosophy of Sustainable Design International Ltd. is an issue which has occupied my mind greatly during this past summer … as I asked myself some difficult questions …
What has really been happening to our planet since 1992 … and earlier, since 1972 ?
Where is SDI now ?
Are we on the same track … the right track ?
Where are we going in the short to medium-term future ?
Architecture … is practice as a separate design disciple now obsolete ?
Fire Engineering … can it be dragged, screaming, from the proverbial ‘caves’ … and transformed to respond creatively to the safety and security requirements of a complex built environment ?
Sustainability … what impact does this intricate, open, dynamic and still evolving concept have … should it have … on the provision of conventional Architectural and Fire Engineering Services ?
‘Green’ … is this marketing ploy helpful … or an annoying obstacle … to effective implementation of Sustainable Development ?
Click the Link Above to read and/or download a PDF File (3.73 Mb)
2011 – United Nations Environment Programme
Click the Link Above to read and/or download a PDF File (4.83 Mb)
Extract from ‘Foreword’ …
This publication serves as a timely update on what has occurred since the Earth Summit of 1992 and is part of the wider Global Environment Outlook-5 (GEO-5) preparations that will lead to the release of the landmark GEO-5 report in May 2012. It underlines how in just twenty years, the world has changed more than most of us could ever have imagined – geopolitically, economically, socially and environmentally. Very few individuals outside academic and research communities envisaged the rapid pace of change or foresaw developments such as the phenomenal growth in information and communication technologies, ever-accelerating globalization, private sector investments across the world, and the rapid economic rise of a number of ‘developing’ countries. Many rapid changes have also taken place in our environment, from the accumulating evidence of climate change and its very visible impacts on our planet, to biodiversity loss and species extinctions, further degradation of land surfaces and the deteriorating quality of oceans. Certainly, there have been some improvements in the environmental realm, such as the significant reduction in ozone-depleting chemicals and the emergence of renewable energy sources, new investments into which totalled more than $200 thousand million in 2010. But in too many areas, the environmental dials continue to head into the red.
Sustainable Design International Ltd. – Ireland, Italy & Turkey
Click the Link Above to read and/or download a PDF File (670 Kb)
SDI is a professional, trans-disciplinary and collaborative design, architectural, fire engineering, research, and consultancy practice … specialists in the theory and practical implementation of a Sustainable Human Environment (social – built – virtual – economic).
WE are committed to … the protection of society, the best interests of our clients, and ‘user’ welfare … not just cost-effective compliance with the Minimal Health & Safety Objectives in Legislation & Codes !
Sustainability … continues to fundamentally transform our Architectural, Fire Engineering & Consultancy Practice.
2012 – United Nations Environment Programme
Click the Link Above to read and/or download a PDF File (4.72 Mb)
If we measured the world’s response to environmental challenges solely by the number of treaties and agreements that have been adopted, then the situation looks impressive. Over 500 international environmental agreements have been concluded since 1972, the year of the Stockholm Conference and the establishment of the United Nations Environment Programme (UNEP).
These include landmark conventions on issues such as trade in endangered species, hazardous wastes, climate change, biological diversity and desertification. Collectively, these reflect an extraordinary effort to install the policies, aims and desires of countries worldwide to achieve sustainable development.
Yet despite the impressive number of legal texts and many good intentions, real progress in solving the environmental challenges themselves has been much less comprehensive, a point clearly underlined in the Global Environment Outlook-5 (GEO-5), for which this report ‘Measuring Progress: Environmental Goals and Gaps’ and a previous publication ‘Keeping Track of Our Changing Environment: From Rio to Rio+20’ are companion products leading up to Rio+20.
This report outlines findings from a UNEP study that, with support from the Government of Switzerland, has catalogued and analyzed existing ‘Global Environmental Goals’ contained in the international agreements and conventions. It asks the fundamental question as to why the aims and goals of these policy instruments have often fallen far short of their original ambition and intentions. One possible reason is that many of the goals are simply not specific enough; the few goals that are specific and measurable appear to have a much better record of success.
These include goals to phase out lead in gasoline, ozone-depleting substances (ODS) and certain persistent organic pollutants (POP’s), specific Millennium Development Goal targets calling to halve the number of people without access to safe drinking water and improved sanitation, and targets to increase the number and extent of protected areas. Indeed, even when measurable targets have been set but not actually met, they have usually led to positive change and often to significant change.
The vast majority of goals, however, are found to be ‘aspirational’ in nature. They lack specific targets, which generate obvious difficulties in measuring progress towards them. In addition, many aspirational goals are not supported by adequate data that can be used to measure progress, global freshwater quality being one stark example.
It is clear that if agreements and conventions are to achieve their intended purpose, the international community needs to consider specific and measurable goals when designing such treaties, while organizing the required data gathering and putting in place proper tracking systems from the outset.
A set of Sustainable Development Goals, as proposed by the UN Secretary-General’s High-Level Panel on Sustainability, could be an excellent opportunity and starting point to improve this situation while representing another positive outcome from Rio+20, two decades after the Rio Earth Summit of 1992 and four decades after the Stockholm Conference.
Achim Steiner, United Nations Under-Secretary-General, and Executive Director, United Nations Environment Programme (UNEP), Nairobi.
2012-05-18: Déjà-vu …
” In the early hours of the morning of Saturday, 14th February 1981, a disastrous fire swept through a building called the Stardust in the North Dublin suburb of Artane during the course of a St. Valentine’s Night ‘disco’ dance. Forty eight people were killed and one hundred and twenty eight seriously injured. The overwhelming majority of the victims were young people. “
‘Introduction’, Report of the Tribunal of Inquiry on the Fire at the Stardust, Artane, Dublin, on the 14th February 1981. Report dated 30 June 1982.
As a young architect in private practice … I witnessed, at first hand, the Dublin Fire ‘Establishment’ disappear from public view, without trace, after the Stardust Fire Tragedy. It was almost impossible, for at least a year afterwards, to have a meeting with any Fire Prevention Officer in the Dublin Fire Authority. This was a very valuable lesson.
Later, following the publication of the Stardust Tribunal Report … were its Recommendations implemented … with urgency … and conscientiously ? No way. For example, it was more than ten years after the Stardust Fire before an inadequate system of legal National Building Regulations was introduced in Ireland. And to this day, the system of AHJ monitoring of construction quality, throughout the country, is weak and ineffective … lacking both competent personnel and resources !
The proof of the pudding is in the eating … and one of the results, also in Dublin, has been last year’s debacle at the Priory Hall Apartment Complex … where all of the residents had to leave their expensive apartments for fire safety (and many other) reasons. The tip of a very large iceberg. See my post, dated 18 October 2011 .
And this is where the problems usually begin …
” There has been a tendency among students of architecture and engineering to regard fire safety as simply a question of knowing what is required in terms of compliance with the regulations. The recommendation of the Tribunal of Enquiry into the Summerland Disaster that those responsible for the design of buildings should treat fire safety as an integral part of the design concept itself, has not yet been reflected in the approach to the subject at university level. There is still clearly a need for a new approach to the structuring of such courses which will in time bring to an end the attitude of mind, too prevalent at the moment, that compliance with fire safety requirements is something that can be dealt with outside the context of the overall design of the building. “
‘Chapter 9 – Conclusions & Recommendations’, Report of the Tribunal of Inquiry on the Fire at the Stardust, Artane, Dublin, on the 14th February 1981. Report dated 30 June 1982.
This Recommendation has still not been implemented … and note the reference to the earlier fire at the Summerland Leisure Centre in 1973, on the Isle of Man, when 50 people were killed and 80 seriously injured.
Today … the same attitude of mind, described so well above, stubbornly persists in all sectors, and in all disciplines, of the International Construction Industry … even within ISO Technical Committee 92: ‘Fire Safety’ !
Which brings me, neatly, to the recent question posed by Mr. Glenn Horton on the Society of Fire Protection Engineers (SFPE-USA) Page of LinkedIn ( http://www.linkedin.com/groups?gid=96627 ). As usual, the shortest questions can prove to be the most difficult to answer …
” Can you expand on, or point to where anyone has discussed, the ‘very flawed design approach’ please ? “
ESSENTIAL PRELIMINARIES …
1. Foundation Documents
I am assuming that ‘people-who-need-to know’, at international level, are familiar with the Recommendations contained in these 2 Reports …
- NIST (National Institute of Standards and Technology). September 2005. Federal Building and Fire Safety Investigation of the World Trade Center Disaster: Final Report on the Collapse of the World Trade Center Towers. NIST NCSTAR 1 Gaithersburg, MD, USA ;
- NIST (National Institute of Standards and Technology). August 2008. Federal Building and Fire Safety Investigation of the World Trade Center Disaster: Final Report on the Collapse of World Trade Center Building 7. NIST NCSTAR 1A Gaithersburg, MD, USA ;
… and the contents of the CIB W14 Research WG IV Reflection Document … which, together with its 2 Appendices, can be downloaded from this webpage … http://www.cjwalsh.ie/progressive-collapse-fire/ … under the section headed: ‘April 2012’.
However … I am utterly dismayed by the number of ‘people-who-need-to know’ … who do not know … and have never even bothered to dip into the 2 NIST Reports … or the many long-term Post 9-11 Health Studies on Survivors which have already revealed much priceless ‘real’ information about the short and medium term adverse impacts on human health caused by fire !
CIB W14 Research Working Group IV would again strongly caution that Fire-Induced Progressive Damage and Disproportionate Damage are fundamental concepts to be applied in the structural design of all building types.
2. Technical Terminology
While attending the ISO TC92 Meetings in Thessaloniki, during the last week of April 2012, I noticed not just one reference to ‘fire doors’ in a Draft ISO Fire Standard … but many. It surprised me, since I thought this issue had been successfully resolved, at ISO level, many years ago. There is no such thing as a ‘fire door’ … and the careless referencing of such an object, which has no meaning, in building codes and standards has caused countless problems on real construction sites during the last 20-30 years.
Please follow this line of thought …
Fire Resistance: The inherent capability of a building assembly, or an element of construction, to resist the passage of heat, smoke and flame for a specified time during a fire.
Doorset: A building component consisting of a fixed part (the door frame), one or more movable parts (the door leaves), and their hardware, the function of which is to allow, or to prevent, access and egress.
[Commentary: A doorset may also include a door saddle / sill / threshold.]
Fire Resisting Doorset / Shutter Assembly: A doorset / shutter assembly, properly installed or mounted on site, the function of which is to resist the passage of heat, smoke and flame for a specified time during a fire.
… and so we arrive at the correct term … Fire Resisting Doorset … which, as an added bonus, also alerts building designers, construction organizations, and even AHJ inspectors, to the fact that there is more involved here than merely a door leaf.
Now then, I wonder … how, in any sane and rational world, can the term Fire Resistance be used in relation to structural performance during a fire, and the cooling-phase afterwards ? Yet, this is exactly what I read in the building codes of many different jurisdictions. Do people understand what is actually going on ? Or, is the language of Conventional Fire Engineering so illogical and opaque that it is nearly impossible to understand ?
And … if this problem exists within the International Fire Science & Engineering Community … how is it possible to communicate effectively with other design disciplines at any stage during real construction projects. The artificial environments found in academia are not my immediate concern.
3. Fire Research & Development outside CIB W14 & ISO TC92
In 2012 … there is something very wrong when you have to struggle to persuade a group of people who are developing an ISO Standard on Design Fire Scenarios … that they must consider Environmental Impact as one of the major consequences of a fire to be minimized … along with ‘property losses’ and ‘occupant impact’. This is no longer an option.
Environmental Impact: Any effect caused by a given activity on the environment, including human health, safety and welfare, flora, fauna, soil, air, water, and especially representative samples of natural ecosystems, climate, landscape and historical monuments or other physical structures, or the interactions among these factors; it also includes effects on accessibility, cultural heritage or socio-economic conditions resulting from alterations to those factors.
So … how timely, and relevant to practitioners, are ISO Fire Standards ? Perhaps … obsolete at publication … and not very ??
And … there is lot more to the Built Environment than buildings …
Built Environment: Anywhere there is, or has been, a man-made or wrought (worked) intervention in the natural environment, e.g. cities, towns, villages, rural settlements, service utilities, transport systems, roads, bridges, tunnels, and cultivated lands, lakes, rivers, coasts, and seas, etc … including the virtual environment.
We should be very conscious that valuable fire-related research takes place outside, and unrelated to, the established fire engineering groupings of CIB W14 & ISO TC92. But I am curious as to why this research is not properly acknowledged by, or encouraged and fostered within, the ‘system’ ?
Example A: Responding to Recommendation 18 in the 2005 NIST WTC Report … a Multi-Disciplinary Design Team published an article in the magazine Bâtiment et Sécurité (October 2005) on The PolyCentric Tower. I very much enjoy giving practitioners a small flavour of this work, whenever I make presentations at conferences and workshops …
Example B: In spite of a less than helpful submission (to put it mildly) from ISO TC92 Sub-Committee 4 … ISO 21542: ‘Building Construction – Accessibility & Usability of the Built Environment’ was finally published in December 2011 … but it was developed by a Sub-Committee of ISO TC59: ‘Buildings & Civil Engineering Works’ …
With the involvement and support of ISO Technical Committee 178: ‘Lifts, Elevators & Moving Walks’ during its long gestation … ISO 21542 is now able to indicate that all lifts/elevators in a building should be capable of being used for evacuation in the event of a fire. This is already a design feature in a small number of completed Tall Building Projects. Once more, this is no longer an option.
In addition … if a Fire Evacuation Staircase has a minimum unobstructed width of 1.5 m (from edge of handrail on one side of the staircase to edge of handrail on the opposite side) … this will be sufficient to facilitate the following tasks …
- Assisted Evacuation by others, or Rescue by Firefighters, for those building users who cannot independently evacuate the building, e.g. people with activity limitations … shown above, on the right, is assistance being given by three people (one at each side, with one behind) to a person occupying a manual wheelchair ;
- Contraflow Circulation … emergency access by firefighters entering a building and moving towards a fire, while people are still evacuating from the building to a ‘place of safety’ remote from the building … shown above, bottom left, is how not to design an evacuation staircase (!) ;
- Stretcher Lifting … lifting a mobility-impaired person, who may be conscious or unconscious, on a stretcher ;
- Firefighter Removal & Contraflow … shown above, top left, is removal of a firefighter from a building by colleagues in the event of injury, impairment, or a fire event induced health condition … while other firefighters may still be moving towards the fire.
Note that in a Fire Evacuation Staircase … all Handrails are continuous … each Stair Riser is a consistent 150 mm high … each Stair Tread/Going is a consistent 300 mm deep … and there are No Projecting Stair Nosings.
Most importantly … in order to assign sufficient building user space in the design of an Area of Rescue Assistance … ISO 21542 also provides the following Key Performance Indicator … just one aspect of a ‘maximum credible user scenario’ …
10% of people using a building (including visitors) have an impairment, which may be visual or hearing, mental, cognitive or psychological, or may be related to physical function, with some impairments not being identifiable.
Is There Any Connection Between Examples A & B ? There is, and it is a connection which is critical for public safety. The following Performance Indicator illustrates the point …
Innovative Structural Design – Perimeter Core Location – Design for Fire Evacuation – Evacuation for All
” A Building must not only remain Structurally Stable during a fire event, it must remain Serviceable for a period of time which facilitates:
- Rescue by Firefighters of people with activity limitations waiting in areas of rescue assistance ;
- Movement of the firefighters and those people with activity limitations, via safe and accessible routes, to Places of Safety remote from the building ;
- With an assurance of Health, Safety & Welfare during the course of this process of Assisted Evacuation. “
[Refer also to the Basic Requirements for Construction Works in Annex I of the European Union’s Construction Product Regulation 305/2011 – included as Appendix II of the CIB W14 WG IV Reflection Document. Are the Basic Requirements being interpreted properly … or even adequately ??]
ANSWERS TO THE QUESTION …
The Greek Paper is included as Appendix I of CIB W14 WG IV Reflection Document … in order to show that Fire-Induced Progressive Damage is also an issue in buildings with a reinforced concrete frame structure. It is more straightforward, here, to concentrate on buildings with a steel frame structure.
a) Use of ‘Fire Resistance'(?) Tables for Structural Elements
We should all be familiar with these sorts of Tables. The information they contain is generated from this type of standard test configuration in a fire test laboratory …
… and this sort of criterion for ‘loadbearing horizontal elements’ in a fire test standard …
A single isolated loaded steel beam, simply supported, is being tested. As deflection is the only type of deformation being observed and measured … the critical temperature of the steel, i.e. the point when material strength begins to fail rapidly and the rate of beam deflection increases dramatically … is the sole focus for all stakeholders.
Using these Tables, it is very difficult to escape the conclusion that we are merely interior decorators … applying flimsy thermal insulation products to some steel structural elements (not all !) … according to an old, too narrowly focused, almost static (‘cold form’) recipe, which has little to do with how today’s real buildings react to real fires !
This ‘non-design’ approach is entirely inadequate.
With regard to the use of these Tables in Ireland’s Building Regulations (Technical Guidance Document B), I recently submitted the comments below to the relevant Irish AHJ. These same comments could just as easily apply to the use of similar Tables in the Building Regulations for England & Wales (Approved Document B) …
” You should be aware that Table A1 and Table A2 are only appropriate for use by designers in the case of single, isolated steel structural elements.
In steel structural frame systems, no consideration is given in the Tables to adequate fire protection of connections … or limiting the thermal expansion (and other types of deformation) in fire of steel structural elements … in order to reduce the adverse effects of one element’s behaviour on the rest of the frame and/or adjoining non-loadbearing fire resisting elements of construction.
In the case of steel structural frame systems, therefore, the minimum fire protection to be afforded to ALL steel structural elements, including connections, should be 2 Hours. Connections should also be designed and constructed to be sufficiently robust during the course of a fire incident. This one small revision will contribute greatly towards preventing Fire-Induced Progressive Damage in buildings … a related, but different, structural concept to Disproportionate Damage …
The failure of a building’s structural system (i) remote from the scene of an isolated overloading action; and (ii) to an extent which is not in reasonable proportion to that action.
Fire-Induced Progressive Damage
The sequential growth and intensification of structural deformation and displacement, beyond fire engineering design parameters, and the eventual failure of elements of construction in a building – during a fire and the ‘cooling phase’ afterwards – which, if unchecked, will result in disproportionate damage, and may lead to total building collapse. “
Coming from this background and heritage … it is very difficult to communicate with mainstream, ambient structural engineers who are speaking the language of structural reliability, limit state design and serviceability limit states.
b) NIST Report: ‘Best Practice Guidelines for Structural Fire Resistance Design of Concrete and Steel Buildings’ (NISTIR 7563 – February 2009)
At the end of Page 18 in NISTIR 7563 …
” 2.7.2 Multi-Storey Frame Buildings
In recent years, the fire performance of large-frame structures has been shown in some instances to be better than the fire resistance of the individual structural elements (Moore and Lennon 1997). These observations have been supported by extensive computer analyses, including Franssen, Schleich, and Cajot (1995) who showed that, when axial restraint from thermal expansion of the members is included in the analysis of a frame building, the behaviour is different from that of the column and beam analyzed separately.
A large series of full-scale fire tests was carried out between 1994 and 1996 in the Cardington Laboratory of the Building Research Establishment in England. A full-size eight-storey steel building was constructed with composite reinforced concrete slabs on exposed metal decking, supported on steel beams with no applied fire protection other than a suspended ceiling in some tests. The steel columns were fire-protected. A number of fire tests were carried out on parts of one floor of the building, resulting in steel beam temperatures up to 1000 °C, leading to deflections up to 600 mm but no collapse and generally no integrity failures (Martin and Moore 1997). “
Those were Experimental Fire Tests at Cardington, not Real Fires … on ‘Engineered’ Test Constructions, not Real Buildings !! And … incredibly, for a 2009 document … there is no mention at all of World Trade Center Buildings 1, 2 or 7 !?! Where did they disappear to, I wonder ? Too hot to handle ???
Computer Model Verification and Validation (V&V) are very problematic issues within the International Fire Science and Engineering Community. The expected outcome of a Model V&V Process, however, is a quantified level of agreement between experimental data (and, if available, real data) and model prediction … as well as the predictive accuracy of the model.
Now … please meditate carefully on the following …
” NCSTAR 1A (2008) Recommendation D [See also NCSTAR 1 (2005) Recommendation 5)
NIST recommends that the technical basis for the century-old standard for fire resistance testing of components, assemblies and systems be improved through a national effort. Necessary guidance also should be developed for extrapolating the results of tested assemblies to prototypical building systems. A key step in fulfilling this Recommendation is to establish a capability for studying and testing components, assemblies, and systems under realistic fire and load conditions.
Of particular concern is that the Standard Fire Resistance Test does not adequately capture important thermally-induced interactions between structural sub-systems, elements, and connections that are critical to structural integrity. System-level interactions, especially due to thermal expansion, are not considered in the standard test method since columns, girders, and floor sub-assemblies are tested separately. Also, the performance of connections under both gravity and thermal effects is not considered. The United States currently does not have the capability for studying and testing these important fire-induced phenomena critical to structural safety.
Relevance to WTC 7: The floor systems failed in WTC 7 at shorter fire exposure times than the specified fire rating (two hours) and at lower temperatures because thermal effects within the structural system, especially thermal expansion, were not considered in setting the endpoint criteria when using the ASTM E 110 or equivalent testing standard. The structural breakdowns that led to the initiating event, and the eventual collapse of WTC 7, occurred at temperatures that were hundreds of degrees below the criteria that determine structural fire resistance ratings. “
The design approach outlined in NISTIR 7563 is not only very flawed … it lacks any validity … because very relevant and important real fire data has been totally ignored. The Cardington Experimental Fires were not all that they seemed.
c) Current ISO TC92 International Case Study Comparison
Structural Fire Engineering Design of an Airport Terminal Building serving the Capital City of a large country (which shall remain nameless) … constructed using Portal Steel Frames …
My first concern is that the Structural Fire Engineering Design has been undertaken in isolation from other aspects of the Building’s Fire Engineering Design.
On Page 3 of the Case Study Report …
” 4.2 Objectives & Functional Requirements for Fire Safety of Structures
The fire safety objectives of the airport terminal emphasize the safety of life, conservation of property, continuity of operations and protection of the environment. “
Should these not be the Project-Specific Fire Engineering Design Objectives ? Since when, for example, is ‘continuity of operations’ a concern in building codes ??
On Page 7 of the Case Study Report …
” 5.3 Identify Objectives, Functional Requirements & Performance Criteria for Fire Safety of Structure
The Fire Safety Objective of the Steel Structure: There should be no serious damage to the structure or successive collapse in case of fire.
The Functional Requirements are defined as the followings:
(1) Prevent or limit the structural failure in case of fire so as to prevent the fire from spreading within the compartment or to the adjacent fire compartment or the adjacent buildings (to prevent fire spread) ;
(2) Prevent or limit the partial structural failure in case of fire so as to protect the life safety of the occupants and firefighters (to protect life safety) ;
(3) Prevent or limit the structural deformation or collapse so as not to increase the cost or difficulties of the after-fire restoration (to reduce reconstruction cost).
One of the following Performance Requirements shall be met:
(1) The load-bearing capacity of the structure (Rd) shall not be less than the combined effect (Sm) within the required time, that is Rd ≥ Sm. (The maximum permitted deflection for the steel beam shall not be larger than L/400, and the maximum stress of the structure under fire conditions shall not be larger than fyT) ; or
(2) The fire resistance rating of the steel structure (td) shall not be less than the required fire resistance rating (tm), that is, td ≥ tm ; or
(3) Td – the critical internal temperature of the steel structure at its ultimate state shall not be less than Tm (the maximum temperature of the structure within required fire resistance time duration), that is Td ≥ Tm. (300 ℃) “
Once again … we see an emphasis on critical temperature, beam deflection (only), and material strength. L/400 is an impressive Fire Serviceability Limit State … a different world from L/20 or L/30 … but what about other important types of steel structural member deformation, e.g. thermal expansion and distortion ??
Furthermore … if there is a major fire in the area under the lower roof (see Section above) … because of structural continuity, any serious impact on the small frame will also have an impact on the large frame. For Structural Fire Engineering reasons … would it not be wiser to break the structural continuity … and have the small and large portal frames act independently ?
It is proposed that the Portal Frames will NOT be fully fire protected … just the columns, up to a height of 8 metres only. If ‘conservation of property’ and ‘continuity of operations’ are important fire engineering design objectives in this project … why isn’t all of the steel being fully protected ??? What would be the additional cost, as a percentage of the total project cost ?
What exactly is infallible about current Design Fires and Design Fire Scenarios ??? Not much. And in the case of this particular building, should a ‘maximum credible fire scenario’ be at least considered ?
And … what is the fire protection material, product or system being used to protect the Portal Frames ? Will it be applied, fixed or installed correctly ? What is its durability ? Will it be able to resist mechanical damage during the construction process … and afterwards, during the fire event ? What is the reliability of this form of fire protection measure ??
So many questions …
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