British Standard BS 9999 – Code of Practice for Fire Safety in the Design Management and Use of Buildings
Post-9/11 & Post-Mumbai Fire Engineering – What Future ?
Previous Posts in This Series …
2011-10-25: NIST’s Recommendations on the 9-11 WTC Building Collapses … GROUP 1. Increased Structural Integrity – Recommendations 1, 2 & 3 (out of 30)
2011-11-18: NIST WTC Recommendations 4-7 > Structural Fire Endurance … GROUP 2. Enhanced Fire Endurance of Structures – Recommendations 4, 5, 6 & 7
2011-11-24: NIST WTC Recommendations 8-11 > New Design of Structures … GROUP 3. New Methods for Fire Resisting Design of Structures – Recommendations 8, 9, 10 & 11
2011-11-25: NIST WTC Recommendations 12-15 > Improved Active Protection … GROUP 4. Improved Active Fire Protection – Recommendations 12, 13, 14 & 15
2011-11-30: NIST Recommendations 16-20 > Improved People Evacuation … GROUP 5. Improved Building Evacuation – Recommendations 16, 17, 18, 19 & 20
2011-12-04: NIST WTC Recommendations 21-24 > Improved Firefighting … GROUP 6. Improved Emergency Response – Recommendations 21, 22, 23 & 24
2011-12-07: NIST WTC Recommendations 25-28 > Improved Practices … GROUP 7. Improved Procedures and Practices – Recommendations 25, 26, 27 & 28
2011-12-08: NIST WTC Recommendations 29-30 > Improved Fire Education … GROUP 8. Education and Training – Recommendations 29 & 30 (out of 30)
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Colour image showing 'The Cloud' Residential Tower Project, in Seoul (South Korea) ... which will be completed in 2015. Design by MVRDV Architects, The Netherlands. Click to enlarge.
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2011-12-15: You know what is coming soon … so Merry Christmas & Happy New Year to One and All !!
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1. There were 2 Important Reasons for undertaking this Series of Posts …
(a) The General Public, and particularly Client Organizations, should be facilitated in directly accessing the core content of the 2005 NIST WTC Recommendations. Up to now, many people have found this to be a daunting task. More importantly, I also wanted to clearly show that implementation of the Recommendations is still proceeding far too slowly … and that today, many significant aspects of these Recommendations remain unimplemented. Furthermore, in the case of some recent key national standards, e.g. British Standard BS 9999, which was published in 2008 … the NIST Recommendations were entirely ignored.
As a golden rule … National Building Codes/Regulations and National Standards … cannot, should not, and must not … be applied without informed thought and many questions, on the part of a building designer !
(b) With the benefit of hindsight, and our practical experience in FireOx International … I also wanted to add a necessary 2011 Technical Commentary to the NIST Recommendations … highlighting some of the radical implications, and some of the limitations, of these Recommendations … in the hope of initiating a much-needed and long overdue international discussion on the subject.
Colour photograph showing the Taipei 101 Tower, in Taiwan ... which was completed in 2004. Designed by C.Y. Lee & Partners Architects/Planners, Taiwan. Click to enlarge.
” Architecture is the language of a culture.”
” A living building is the information space where life can be found. Life exists within the space. The information of space is then the information of life. Space is the body of the building. The building is therefore the space, the information, and the life.”
C.Y. Lee & Partners Architects/Planners, Taiwan
[ This is a local dialect of familiar Architectural Language. However, the new multi-aspect language of Sustainable Design is fast evolving. In order to perform as an effective and creative member of a Trans-Disciplinary Design & Construction Team ... can Fire Engineers quickly learn to communicate on these wavelengths ?? Evidence to date suggests not ! ]
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2. ‘Climate Change’ & ‘Energy Stability’ – Relentless Driving Forces for Sustainable Design !
Not only is Sustainable Fire Engineering inevitable … it must be ! And not at some distant point in the future … but now … yesterday !! There is such a build-up of pressure on Spatial Planners and Building Designers to respond quickly, creatively, intuitively and appropriately to the relentless driving forces of Climate Change (including climate change mitigation, adaptation, and severe weather resilience) and Energy Stability (including energy efficiency and conservation) … that there is no other option for the International Fire Science and Engineering Community but to adapt. Adapt and evolve … or become irrelevant !!
And one more interesting thought to digest … ‘Green’ is not the answer. ’Green’ looks at only one aspect of Sustainable Human & Social Development … the Environment. This is a blinkered, short-sighted, simplistic and ill-conceived approach to realizing the complex goal of a Safe and Sustainable Built Environment. ‘Green’ is ‘Sustainability’ for innocent children !!
Colour image showing the Shanghai Tower Project, in China ... which will be completed in 2014. Design by Gensler Architects & Planners, USA. Click to enlarge.
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(a) Organization for Economic Co-Operation & Development (OECD) – 2012′s Environmental Outlook to 2050
Extract from Pre-Release Climate Change Chapter, November 2011 …
‘ Climate change presents a global systemic risk to society. It threatens the basic elements of life for all people: access to water, food production, health, use of land, and physical and natural capital. Inadequate attention to climate change could have significant social consequences for human wellbeing, hamper economic growth and heighten the risk of abrupt and large-scale changes to our climatic and ecological systems. The significant economic damage could equate to a permanent loss in average per capita world consumption of more than 14% (Stern, 2006). Some poor countries would be likely to suffer particularly severely. This chapter demonstrates how avoiding these economic, social and environmental costs will require effective policies to shift economies onto low-carbon and climate-resilient growth paths.’
(b) U.N. World Meteorological Organization (WMO) Greenhouse Gas Bulletin No.7, November 2011
Executive Summary …
The latest analysis of observations from the WMO Global Atmosphere Watch (GAW) Programme shows that the globally averaged mixing ratios of Carbon Dioxide (CO2), Methane (CH4) and Nitrous Oxide (N2O) reached new highs in 2010, with CO2 at 389.0 parts per million (ppm), CH4 at 1808 parts per billion (ppb) and N2O at 323.2 ppb. These values are greater than those in pre-industrial times (before 1750) by 39%, 158% and 20%, respectively. Atmospheric increases of CO2 and N2O from 2009 to 2010 are consistent with recent years, but they are higher than both those observed from 2008 to 2009 and those averaged over the past 10 years. Atmospheric CH4 continues to increase, consistent with the past three years. The U.S. National Oceanic & Atmospheric Administration (NOAA) Annual Greenhouse Gas Index shows that from 1990 to 2010 radiative forcing by long-lived Greenhouse Gases (GHG’s) increased by 29%, with CO2 accounting for nearly 80% of this increase. Radiative forcing of N2O exceeded that of CFC-12, making N2O the third most important long-lived Greenhouse Gas.
(c) International Energy Agency (IEA) – World Energy Outlook, November 2011
Extract from Executive Summary …
‘ There are few signs that the urgently needed change in direction in global energy trends is underway. Although the recovery in the world economy since 2009 has been uneven, and future economic prospects remain uncertain, global primary energy demand rebounded by a remarkable 5% in 2010, pushing CO2 emissions to a new high. Subsidies that encourage wasteful consumption of fossil fuels jumped to over $400 billion. The number of people without access to electricity remained unacceptably high at 1.3 Billion, around 20% of the world’s population. Despite the priority in many countries to increase energy efficiency, global energy intensity worsened for the second straight year. Against this unpromising background, events such as those at the Fukushima Daiichi Nuclear Power Plant and the turmoil in parts of the Middle East and North Africa (MENA) have cast doubts on the reliability of energy supply, while concerns about sovereign financial integrity have shifted the focus of government attention away from energy policy and limited their means of policy intervention, boding ill for agreed global climate change objectives.’
Colour image showing the One World Trade Center Project, in New York City (USA) ... which will be completed in 2013. Design by Skidmore Owings & Merrill, Architects/Planners, USA. Click to enlarge.
[ Not just in the case of Tall, Super-Tall and Mega-Tall Buildings ... but the many, many Other Building Types in the Built Environment ... are Building Designers implementing the 2005 & 2008 NIST WTC Recommendations ... without waiting for Building and Fire Codes/Regulations and Standards to be properly revised and updated ?? Evidence to date suggests not ! ]
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3. Separate Dilemmas for Client Organizations and Building Designers …
As discussed earlier in this Series … the Fire Safety Objectives of Building and Fire Codes/Regulations are limited to:
- The protection of building users/occupants ; and
- The protection of property … BUT only insofar as that is relevant to the protection of the users/occupants ;
… because the function of Building and Fire Codes is to protect Society. Well, that is supposed to be true ! Unfortunately, not all Codes/Regulations are adequate or up-to-date … as we have been observing here in these posts.
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Just taking the Taipei 101 Tower as an example, I have very recently sent out three genuine, bona fide e-mail messages from our practice …
2011-12-08
Toshiba Elevator & Building Systems Corporation (TELC), Japan.
To Whom It May Concern …
Knowing that your organization was involved in the Taipei 101 Project … we have been examining your WebSite very carefully. However, some important information was missing from there.
For our International Work … we would like to receive technical information on the Use of Elevators for Fire Evacuation in Buildings … which we understand is actually happening in the Taipei Tower, since it was completed in 2004.
The Universal Design approach must also be integrated into any New Elevators.
Can you help us ?
C.J. Walsh
[2012-01-10 ... No reply yet !]
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2011-12-12
Mr. Thomas Z. Scarangello P.E. – Chairman & CEO, Thornton Tomasetti Structural Engineers, New York.
Dear Thomas,
Knowing that your organization was involved in the structural design of the Taipei 101 Tower, which was completed in 2004 … and in the on-going design of many other iconic tall, super-tall and mega-tall buildings around the world … we have been examining your Company Brochures and WebSite very carefully. However, some essential information is missing.
As you are certainly aware … implementation of the 2005 & 2008 National Institute of Standards & Technology (NIST) Recommendations on the Collapse of WTC Buildings 1, 2 & 7, in New York, on 11 September 2001 … is still proceeding at a snail’s pace, i.e. very slowly. Today, many significant aspects of NIST’s Recommendations remain unimplemented.
For our International Work … we would like to understand how you have responded directly to the NIST Recommendations … and incorporated the necessary additional modifications into your current structural fire engineering designs.
Many thanks for your kind attention. In anticipation of your prompt and detailed response …
C.J. Walsh
[2012-01-10 ... No reply yet !]
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2011-12-14
Mr. C.Y. Lee & Mr. C.P. Wang, Principal Architects – C.Y. Lee & Partners Architects/Planners, Taiwan.
Dear Sirs,
Knowing that your architectural practice designed the Taipei 101 Tower, which was completed in 2004 … and, later, was also involved in the design of other tall and super-tall buildings in Taiwan and China … we have been examining your Company WebSite very carefully. However, some essential information is missing.
As you are probably aware … implementation of the 2005 & 2008 U.S. National Institute of Standards & Technology (NIST) Recommendations on the Collapse of WTC Buildings 1, 2 & 7, in New York City, on 11 September 2001 … is still proceeding at a snail’s pace, i.e. very slowly. Today, many significant aspects of NIST’s Recommendations remain unimplemented.
For our International Work … we would like to understand how you have responded directly to the NIST Recommendations … and incorporated the necessary additional modifications into your current architectural designs.
Many thanks for your kind attention. In anticipation of your prompt and detailed response …
C.J. Walsh
[2012-01-10 ... No reply yet !]
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So … how many Clients, or Client Organizations, are aware that to properly protect their interests … even, a significant part of their interests … it is vitally necessary that Project-Specific Fire Engineering Design Objectives be developed which will have a much wider scope ? The answer is … not many !
How many Architects, Structural Engineers, and Fire Engineers fully explain this to their Clients or Client Organizations ?
And how many Clients/Client Organizations either know that they should ask, or have the balls to ask … their Architect, Structural Engineer and Fire Engineer for this explanation … and furthermore, in the case of any High-Rise Building, Iconic Building, or Building having an Important Function or an Innovative Design … ask the same individuals for some solid reassurance that they have responded directly to the 2005 & 2008 NIST WTC Recommendations … and incorporated the necessary additional modifications into your current designs … whatever current Building and Fire Codes/Regulations do or do not say ?? A big dilemma !
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A common and very risky dilemma for Building Designers, however, arises in the situation where the Project Developer, i.e. the Client/Client Organization … is the same as the Construction Organization. The Project Design & Construction Team - as a whole - now has very little power or authority if a conflict arises over technical aspects of the design … or over construction costs. An even bigger dilemma !!
Colour image showing the Kingdom Tower Project, in Jeddah (Saudi Arabia) ... which will be completed in 2018. Design by Adrian Smith & Gordon Gill Architecture, USA. Click to enlarge.
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4. The Next Series of Posts – 2008 NIST WTC Recommendations
In the new year of 2012 … I will examine the later NIST Recommendations which were a response to the Fire-Induced Progressive Collapse of World Trade Center Building No.7.
Colour image showing the Signature Tower Project, in Jakarta (Indonesia) ... which will be completed in 2016. Design by Smallwood Reynolds Stewart Stewart Architects & Planners, USA. Click to enlarge.
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5. Please … Your Comments, Views & Opinions ?!?
The future of Conventional Fire Engineering ended on the morning of Tuesday, 11 September 2001, in New York City … an engineering discipline constrained by a long heritage deeply embedded in, and manacled to, an outdated and inflexible prescriptive approach to Codes/Regulations and Standards … an approach which is irrational, ignores the ‘real’ needs of the ‘real’ people who use and/or occupy ‘real’ buildings … and, quite frankly, no longer makes any scientific sense !!
On the other hand … having confronted the harsh realities of 9/11 and the Mumbai ‘Hive’ Attacks, and digested the 2005 & 2008 NIST WTC Recommendations … Sustainable Fire Engineering … having a robust empirical basis, being ‘person-centred’, and positively promoting creativity … offers the International Fire Science and Engineering Community a confident journey forward into the future … on many diverse routes !
This IS the only appropriate response to the exciting architectural innovations and fire safety challenges of today’s Built Environment.
BUT … what do you think ?
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NIST’s Recommendations on the 9-11 WTC Building Collapses
2011-10-25: Since shortly after my visit to Lower Manhattan in mid-October 2001 … we have maintained an Archive Page on ‘Structural Fire Engineering, World Trade Center Incident (9-11) & Fire Serviceability Limit States‘ … at SDI’s Corporate WebSite. And I have referenced here … many, many times … the Recommendations contained in the 2005 & 2008 Final Reports of the U.S. National Institute of Standards & Technology (NIST) on the 9-11 World Trade Center Building 1, 2 & 7 Collapses.
In this post (and a series of future posts) … I find it most necessary that the 2005 & 2008 NIST Recommendations now be presented for everyone to read. Yes, some of Recommendations apply specifically to Tall and Very Tall Buildings … and Building Designers in India, China, Brazil, Russia & South Africa (BRICS), the Arab Gulf Region, Europe and North America, etc., should be fully aware of their contents.
BUT … I am also strongly convinced … precisely because I am an Architect, a Fire Engineer and a Technical Controller … that most of the NIST Recommendations apply to ALL Buildings … so catastrophic was the failure exposed on that fateful day (11 September 2001) … in all of our common design and construction practices … and our operation, maintenance and emergency response procedures !
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PRELIMINARY COMMENTS
1. Extract from Paragraph #9.2, Chapter 9, NIST Final Report on the Collapse of the World Trade Center Towers – Report Reference NIST NCSTAR 1 (2005) …
- NIST believes that these Recommendations are both realistic and achievable within a reasonable period of time, and that their implementation would make buildings safer for occupants and emergency responders in future emergencies.
- NIST strongly urges that immediate and serious consideration be given to these Recommendations by the building and fire safety communities – especially designers, owners, developers, codes and standards development organizations, regulators, fire safety professionals, and emergency responders.
- NIST also strongly urges building owners and public officials to: (i) evaluate the safety implications of these Recommendations for their existing inventory of buildings; and (ii) take the steps necessary to mitigate any unwarranted risks without waiting for changes to occur in codes, standards, and practices.
2. At the time of writing … it is important to point out that although they are related Structural Concepts … and there is still, to this day, a lot of confusion about these concepts in the USA … it is important to clearly distinguish between …
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 Collapse
The sequential growth and intensification of distortion, displacement and 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.
3. Recommendation 2, below, would certainly need to be understood and implemented within today’s additional design constraints of Sustainable Climate Change Adaptation and Resilience to Severe Weather Events. Therefore … Design Wind Speeds must be increased, accordingly, for ALL Buildings.
4. As such a high level of performance is expected … indeed demanded … of a Sustainable Building … Sustainable Fire Engineering must be ‘reliability-based’. In other words, it must have a rational, empirical and scientifically robust basis … unlike conventional fire engineering, which is yet aimlessly wandering around in pre-historic caves !
5. Finally … there is no use trying to hide the fact that progress on implementing the NIST Recommendations, within the USA, has been lamentably slow. Outside that jurisdiction, the response has ranged from mild interest, to complete apathy, and even to vehement antipathy. The implications arising from implementation are much too hard to digest … for long established fire safety professionals and researchers who are unswervingly committed to the flawed and out-of-date practices and procedures of conventional fire engineering and, especially, for vested interests !
However … is it either in society’s interest, or in the interests of our clients/client organizations … that, to give you a simple example which is relevant close to home, British Standard 9999 (published on 31 October 2008): ‘Code of Practice for Fire Safety in the Design, Management and Use of Buildings’ takes absolutely no account of any of the NIST Recommendations ? As far as the British Standards Institution is concerned … 9-11 never happened … which I think is an inexcusable and unforgivable technical oversight !
For this reason, the General Public in ALL of our societies and Clients/Client Organizations in ALL countries should also be fully aware of the contents of these Recommendations …
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Colour photograph showing the two World Trade Center Towers immediately after the impact of the second plane. At a fundamental level, this was a very serious 'real' fire incident ... which was extensively, and very thoroughly, investigated by the U.S. National Institute of Standards & Technology (NIST) ... and resulted in the important 2005 & 2008 NIST Recommendations. Click to enlarge.
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2005 NIST WTC RECOMMENDATIONS
GROUP 1. Increased Structural Integrity
The standards for estimating the load effects of potential hazards (e.g. progressive collapse, wind) and the design of structural systems to mitigate the effects of those hazards should be improved to enhance structural integrity.
NIST WTC Recommendation 1.
NIST recommends that: (1) progressive collapse be prevented in buildings through the development and nationwide adoption of consensus standards and code provisions, along with the tools and guidelines needed for their use in practice; and (2) a standard methodology be developed – supported by analytical design tools and practical design guidance – to reliably predict the potential for complex failures in structural systems subjected to multiple hazards.
a. Progressive collapse* should be prevented in buildings.
[ * F-19 Progressive collapse (or disproportionate damage) occurs when an initial local failure spreads from structural element to structural element resulting in the collapse of an entire structure or a disproportionately large part of it.]
The primary structural systems should provide alternate paths for carrying loads in case certain components fail (e.g. transfer girders or columns). This is especially important in buildings where structural components (e.g. columns, girders) support unusually large floor areas.*
[ * F-20 While the WTC towers eventually collapsed, they had the capacity to redistribute loads from impact and fire damaged structural components and sub-systems to undamaged components and sub-systems. However, the core columns in the WTC towers lacked sufficient redundant (alternative) paths for carrying gravity loads.]
Progressive collapse is addressed only in a very limited way in practice and by codes and standards. For example, the initiating event in design to prevent progressive collapse may be removal of one or two columns at the bottom of the structure. Initiating events at multiple locations within the structure, or involving other key components and sub-systems, should be analyzed commensurate with the risks considered in the design. The effectiveness of mitigation approaches involving new system and sub-system design concepts should be evaluated with conventional approaches based on indirect design (continuity, strength and ductility of connections), direct design (local hardening), and redundant (alternate) load paths. The capability to prevent progressive collapse due to abnormal loads should include: (i) comprehensive design rules and practice guides; (ii) evaluation criteria, methodology, and tools for assessing the vulnerability of structures to progressive collapse; (iii) performance-based criteria for abnormal loads and load combinations; (iv) analytical tools to predict potential collapse mechanisms; and (v) computer models and analysis procedures for use in routine design practice. The federal government should co-ordinate the existing programmes that address this need: those in the Department of Defence; the General Services Administration; the Defence Threat Reduction Agency; and NIST. Affected Standards: ASCE-7, AISC Specifications, and ACI 318. These standards and other relevant committees should draw on expertise from ASCE/SFPE 29 for issues concerning progressive collapse under fire conditions. Model Building Codes: The consensus standards should be adopted in model building codes (i.e. the International Building Code and NFPA 5000) by mandatory reference to, or incorporation of, the latest edition of the standard. State and local jurisdictions should adopt and enforce the improved model building codes and national standards based on all 30 WTC Recommendations (2005). The codes and standards may vary from the WTC Recommendations, but satisfy their intent.
b. A robust, integrated predictive capability should be developed, validated, and maintained to routinely assess the vulnerability of whole structures to the effects of credible hazards. This capability to evaluate the performance and reserve capacity of structures does not exist and is a significant cause for concern. This capability would also assist in investigations of building failure – as demonstrated by the analyses of the WTC building collapses carried out in this Investigation. The failure analysis capability should include all possible complex failure phenomena that may occur under multiple hazards (e.g. bomb blasts, fires, impacts, gas explosions, earthquakes, and hurricane winds), experimentally validated models, and robust tools for routine analysis to predict such failures and their consequences. This capability should be developed via a co-ordinated effort involving federal, private sector, and academic research organizations in close partnership with practicing engineers.
NIST WTC Recommendation 2.
NIST recommends that nationally accepted performance standards be developed for: (1) conducting wind tunnel testing of prototype structures based on sound technical methods that result in repeatable and reproducible results among testing laboratories; and (2) estimating wind loads and their effects on tall buildings for use in design, based on wind tunnel testing data and directional wind speed data. Wind loads specified in current prescriptive codes may not be appropriate for the design of very tall buildings since they do not account for building-specific aerodynamic effects. Further, a review of wind load estimates for the WTC towers indicated differences by as much as 40 % from wind tunnel studies conducted in 2002 by two independent commercial laboratories. Major sources of differences in estimation methods currently used in practice occur in the selection of design wind speeds and directionality, the nature of hurricane wind profiles, the estimation of ‘component’ wind effects by integrating wind tunnel data with wind speed and direction information, and the estimation of ‘resultant’ wind effects using load combination methods. Wind loads were a major factor in the design of the WTC tower structures and were relevant to evaluating the baseline capacity of the structures to withstand abnormal events such as major fires or impact damage. Yet, there is lack of consensus on how to evaluate and estimate winds and their load effects on buildings.
a. Nationally accepted standards should be developed and implemented for conducting wind tunnel tests, estimating site-specific wind speed and directionality based on available data, and estimating wind loads associated with specific design probabilities from wind tunnel test results and directional wind speed data.
b. Nationally accepted standards should be developed for estimating wind loads in the design of tall buildings. The development of performance standards for estimating wind loads should consider: (1) appropriate load combinations and load factors, including performance criteria for static and dynamic behaviour, based on both ultimate and serviceability limit states; and (2) validation of wind load provisions in prescriptive design standards for tall buildings, given the universally acknowledged use of wind tunnel testing and associated performance criteria. Limitations to the use of prescriptive wind load provisions should be clearly identified in codes and standards.
The standards development work can begin immediately to address many of the above needs. The results of those efforts should be adopted in practice as soon as they become available. The research that will be required to address the remaining needs also should begin immediately and results should be made available for standards development and use in practice. Affected National Standard: ASCE-7. Model Building Codes: The standard should be adopted in model building codes by mandatory reference to, or incorporation of, the latest edition of the standard.
NIST WTC Recommendation 3.
NIST recommends that an appropriate criterion be developed and implemented to enhance the performance of tall buildings by limiting how much they sway under lateral load design conditions (e.g. winds and earthquakes). The stability and safety of tall buildings depend upon, among other factors, the magnitude of building sway or deflection, which tends to increase with building height. Conventional strength-based methods, such as those used in the design of the WTC towers, do not limit deflections. The deflection limit state criterion, which is proposed here is in addition to the stress limit state and serviceability requirement; it should be adopted either to complement the safety provided by conventional strength-based design or independently as an alternate deflection-based approach to the design of tall buildings for life safety. The recommended deflection limit state criterion is independent of the criterion used to ensure occupant comfort, which is met in current practice by limiting accelerations (e.g. in the 15 to 20 milli-g range). Lateral deflections, which already are limited in the design of tall buildings to control damage in earthquake-prone regions, should also be limited in non-seismic areas.*
[ * F-22 Analysis of baseline performance under the original design wind loads indicated that the WTC towers would need to have been between 50 % and 90 % stiffer to achieve a typical drift ratio used in current practice for non-seismic regions, though not required by building codes. Limiting drift would have required increasing exterior column areas in lower stories and/or significant additional damping.]
Affected National standards: ASCE-7, AISC Specifications, and ACI 318. Model Building Codes: The standard should be adopted in model building codes by mandatory reference to, or incorporation of, the latest edition of the standard.
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Buildings & Firefighters Not Yet Safer ! – 10 Years After 9-11 (II)
2011-09-20: Continuing on from where I left off on 11 September 2011 …
Applying the Recommendations contained in the 2005 & 2008 National Institute of Standards & Technology (NIST – USA) Reports on the 9-11 WTC Buildings 1, 2 & 7 Collapses to the everyday practice of Architecture and Fire Engineering has been a central part of our work for many years. Long discussions on this subject have taken place within CIB (International Council for Building Research) Working Commission 14: ‘Fire Safety’ … and I also chair Commission 14′s Research Working Group IV on ‘Fire-Induced Progressive Collapse’.
My particular interest in Disproportionate Damage and Progressive Collapse reaches back as far as the late 1980′s !
So I was intrigued, amused … and at the same time, highly concerned … to read the following Letter to the Editor of the Irish Times Newspaper, on Saturday 10 September 2011 …
Recalling 9/11
Sir, – One of the most important factors in the tragedy of 9/11, and one that has received scant attention, was the mode of failure of the towers.
They were struck high up on their structures and failed via progressive collapse. Had they been designed this side of the Atlantic, they would not have collapsed. These were flimsy structures. -
Yours, etc,
Jim Ryan, Chartered Structural Engineer,
Waterfall, Cork.
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JIM … If the WTC Towers (which were not flimsy structures !) had been designed on this side of the Atlantic … they would have collapsed.
Furthermore … If the Towers had only been completed last week in the USA, Ireland, England & Wales, India or China … they would still collapse, if a similar event were to occur next year.
To be crystal clear … What we witnessed, on Tuesday 11 September 2001, was a Collapse Level Event (CLE) which exposed, very harshly and cruelly, a catastrophic failure in all of our common Design and Construction Practices and Procedures used in/by/as …
- Architectural Design | (Ambient) Structural Engineering | Fire Engineering ;
- Building Management Systems ;
- Emergency Responders | Firefighters | Rescue Teams ;
- Technical Control Organizations Having Authority (AHJ’s) or Jurisdiction ;
- Fire Safety Objectives in Building Legislation, Codes and Standards.
To the average ‘person in the street’ … Whether he/she lives in Manhattan or Chicago in the USA, Dublin or Cork in Ireland, Cardiff or London in Britain, Dilli or Mumbai in India, Beijing or Shanghai or Hong Kong in China … it is unacceptable that buildings collapse … entirely unacceptable !!
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COLLAPSE OF WTC BUILDINGS 1, 2 & 7
JIM … Unless you believe in conspiracy theories, please study the 2005 & 2008 NIST(USA) Reports on the 9-11 WTC Buildings 1, 2 & 7 Collapses. The 2 Final Reports can be downloaded from this Page on Sustainable Design International’s Corporate WebSite … http://www.sustainable-design.ie/fire/structdesfire.htm … along with other key documents and links.
Some indication of the enormous quantity of 9-11 WTC Incident Documentation issued by NIST(USA) can be seen below …
Colour photograph showing the enormous quantity of 9-11 WTC Incident Documentation, issued by the U.S. National Institute of Standards & Technology, which is still readily available for the public to access and download.
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PUBLIC SAFETY 10 YEARS AFTER 9-11 ?
If it is entirely unacceptable to the Public that buildings collapse … in how many National Building Codes does the following Critical Public Safety Equation appear today ? The answer is NONE !
Colour image showing Page 21 from my Overhead Presentation on 'Sustainable Fire Engineering' ... scheduled for this Thursday, 22 September 2011, at the ASFP Ireland Fire Seminar & Workshop ... to be held at the RDS, in Ballsbridge, Dublin. Click to enlarge.
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Is there some fundamental reason why Levels of Safety for the Public should vary so much from one country to another ? NO, there is not !
Within Europe, and in relation to the New EU Construction Product Regulation 305/2011, which I discussed here a few days ago … the European Commission, in a discussion document dating back to the mid-1980′s, suggested that the only way to effectively realize a Single Market for Construction Products would be to introduce Harmonized EU Building Regulations in all of the EU Member States. Of course the Member States, at the time, went ballistic at the very mention of this idea … and it was quickly withdrawn. I take great pleasure in repeating that important idea today.
Jim … The Critical Public Safety Statement above is fully consistent with … and meets … the ‘Basic Requirements for Construction Works’ in Annex I of EU Regulation 305/2011.
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However, in relation to any one EU Member State … let’s take Ireland as an example … compare a situation where, in a remote rural location, it might take almost an hour for a sufficient fire service presence to arrive at the scene of a building fire emergency … with a similar situation in the middle of a city, or large town, where the time required will not be greater than 15 minutes … then, although the Level of Safety for the Public can be / should be / must be the same in both situations … I would expect, in the remote rural location having a poor fire service support infrastructure, that the range of Fire Protection Measures to be employed in a typical building would be more extensive, and the performance expected of those Measures would be higher … in order to achieve an Equivalent Level of Safety in both rural and urban locations. Is that not a rational idea ??
Unfortunately, that’s not how the present systems work … National or European ! Levels of Public Safety differ from one country to the next … and from one region, within any one country, to the next … without any good reason … and without meaningful consultation and the full understanding of the Public.
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BUILDINGS & FIREFIGHTERS ARE NOT YET SAFER
JIM … In spite of all of the spin coming from the other side of the Atlantic … and discounting criminality and fraud in construction practices … Buildings and Firefighters are not yet safer … because the large, difficult, complex flaws and failures in Conventional Fire Engineering have not yet been aggressively confronted … and properly solved.
In a post last year, on 18 October 2010 … I referred to the Cul-de-Sac of Current Fire Engineering … and illustrated a typical architectural detail in a Dublin Building – a common detail also to be found in India, China, USA, England & Wales, etc., etc – which demonstrates a Fundamental Flaw at the very core of conventional thinking and practice.
On Thursday next … 22 September 2011 … at the ASFP Ireland Fire Seminar and Workshop in the RDS, Dublin … I will present this flawed detail … and a solution which is fully compatible with … and answers … the NIST Recommendations !
BUT … would anybody like to show me where any National Building Codes have been revised and updated to solve this Fundamental Flaw ?
Colour image showing Page 33 from my Overhead Presentation on 'Sustainable Fire Engineering' ... scheduled for this Thursday, 22 September 2011, at the ASFP Ireland Fire Seminar & Workshop ... to be held at the RDS, in Ballsbridge, Dublin. Click to enlarge.
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Colour image showing Page 35 from my Overhead Presentation on 'Sustainable Fire Engineering' ... scheduled for this Thursday, 22 September 2011, at the ASFP Ireland Fire Seminar & Workshop ... to be held at the RDS, in Ballsbridge, Dublin. Click to enlarge.
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Colour image showing Page 36 from my Overhead Presentation on 'Sustainable Fire Engineering' ... scheduled for this Thursday, 22 September 2011, at the ASFP Ireland Fire Seminar & Workshop ... to be held at the RDS, in Ballsbridge, Dublin. Click to enlarge.
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Colour image showing Page 37 from my Overhead Presentation on 'Sustainable Fire Engineering' ... scheduled for this Thursday, 22 September 2011, at the ASFP Ireland Fire Seminar & Workshop ... to be held at the RDS, in Ballsbridge, Dublin. Click to enlarge.
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Colour image showing Page 38 from my Overhead Presentation on 'Sustainable Fire Engineering' ... scheduled for this Thursday, 22 September 2011, at the ASFP Ireland Fire Seminar & Workshop ... to be held at the RDS, in Ballsbridge, Dublin. Click to enlarge.
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A CASE STUDY OF ENGLAND & WALES
10 years after 9-11 … there are two reasons for taking a closer look at England & Wales (Britain) …
- The Building Regulations for England & Wales were used as the model for the Irish Building Regulations, which were first introduced here in the early 1990′s. And, in the absence of Harmonized European Standards … British National Standards tend, with only a few exceptions, to become the default Irish National Standard ;
- British National Standards are being applied in many different parts of the world outside England & Wales … in most cases, without any proper consideration of content … or adaptation to local conditions.
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Colour image showing the Cover Page of Approved Document B: 'Fire Safety' ... Volume 2 - Buildings Other Than Dwellinghouses ... from the Building Regulations for England & Wales. Click to enlarge.
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The Institution of Fire Engineers (Ireland) Annual Fire Conference, which was held last year, on Wednesday 20th October 2010 … in the Dublin Fire Brigade Training Centre, Marino, Dublin … threw up some interesting ‘notions’ for consideration by a diverse range of participants.
One curious proposition … repeated quite often during the day … was that Approved Document B, in the British System of Building Regulations, was basically still a sound document … and that it should pass an upcoming major review with little difficulty.
I don’t agree … Approved Document B is inadequate and dysfunctional !
With regard to Structural Performance in Fire … instead of referring to Approved Document A – Structure … the reader is referred to Appendices at the back of Approved Document B, which only reinforce the erroneous concept of Single Structural Element Fire Protection …
And along with its many other major problems … see my post, dated 2009-06-14 … British Standard BS 9999 takes no account of any of the 2005 & 2008 NIST Recommendations, Fire-Induced Progressive Collapse or Disproportionate Damage … and, in fact, directly conflicts with aspects of the Building Regulations for England & Wales …
Colour image showing Page 51 in the Appendix of my Overhead Presentation on 'Sustainable Fire Engineering' ... scheduled for this Thursday, 22 September 2011, at the ASFP Ireland Fire Seminar & Workshop ... to be held at the RDS, in Ballsbridge, Dublin. Click to enlarge.
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In order to take a close look at Approved Document B … I used the vehicle of a Notional Hotel Project in Cardiff, Wales … similar to the Early 1990′s Dublin Hotel Project shown above …
Colour image showing Page 52 in the Appendix of my Overhead Presentation on 'Sustainable Fire Engineering' ... scheduled for this Thursday, 22 September 2011, at the ASFP Ireland Fire Seminar & Workshop ... to be held at the RDS, in Ballsbridge, Dublin. Click to enlarge.
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With regard to properly showing Fitness for Intended Use of Fire Protection related Products and Building Systems … instead of referring to Regulation 7 … the reader is again referred to Appendices at the back of Approved Document B … which explains why we have such serious problems, i.e. lack of Durability and very low Resistance to Mechanical Damage, with the Thermal Insulation Products used for the Fire Protection of Structural Steelwork …
I also had to quote from Part D of the Irish Building Regulations to fill a gap in the British Regulation 7 …
Colour image showing Page 53 in the Appendix of my Overhead Presentation on 'Sustainable Fire Engineering' ... scheduled for this Thursday, 22 September 2011, at the ASFP Ireland Fire Seminar & Workshop ... to be held at the RDS, in Ballsbridge, Dublin. Click to enlarge.
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Building Design Must Improve Firefighter Safety in Fire Incidents !
Back to the present … and in any jurisdiction, news of Firefighter Fatalities and/or Injuries is very distressing. It has been remarkable to note, however, how some countries, e.g. Japan, are expending significant time and resources on developing innovative ways to improve firefighter safety in buildings … while most countries are not. Over many years, I have formed the clear impression that, generally, firefighters are regarded in much the same way as soldiers, i.e. they are a disposable asset … ‘Theirs not to reason why / Theirs but to do and die’ … etc., etc. This situation is entirely unacceptable, and in need of urgent resolution !
On 6th & 7th July … in Cardiff, Wales … I have been invited by the International President of the Institution of Fire Engineers (IFE), Mr. HG Tay, to make a presentation on ‘Sustainable Fire Engineering’ at the 2011 IFE International Fire Conference and Annual General Meeting. I am greatly honoured by this invitation.
During the course of that presentation, I will be referring to Firefighter Safety … but much more needs to be said, beforehand, in relation to the untapped contribution of building design to greater levels of firefighter safety …
INTRODUCTION
It may be obvious for some (but, believe me, not for all !) that with regard to fighting fires in buildings … Firefighters have 2 Basic Functions :
- to rescue people who are trapped in a Fire Building (i.e. a building which is on fire) … or people who, for some reason, cannot independently evacuate the building (e.g. people with activity limitations) ; and
- to fight those fires, and ensure that they are properly extinguished.
Note: Extinction of a fire is confirmed only after a thorough visual inspection by a competent person.
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DESIGN & CONSTRUCTION
In a previous post, dated 13 December 2010 … I said that it was no longer ethically acceptable to ignore the issue of Firefighter Safety in the design and construction of buildings … because design can make a major contribution to their safety.
Unfortunately, Firefighter Safety must continue to remain an ethical issue because Building Regulations in most countries rarely, if ever, refer to this important aspect of design and construction. Safety at Work Legislation has a related, but different, intent.
Regrettably, most of the building design professions either have no Code of Ethics … or there is a Code which is ‘lite-lite-lite’, i.e. very weak on ethics … or, worse still, they have a Code … but it is called a Code of Professional Conduct, the principal intent of which is to preserve and protect the profession and its vested interests.
At European Level …
Essential Requirements 1 & 2 (of 6 … for the time being) … in Annex I of European Union (EU) Council Directive 89/106/EEC, of 21 December 1988, on the approximation of laws, regulations and administrative provisions of the Member States relating to Construction Products … state the following …
1. Mechanical Resistance & Stability
The construction works must be designed and built in such a way that the loadings that are liable to act on it during its construction and use will not lead to any of the following:
(a) collapse of the whole or part of the works ;
(b) major deformations to an inadmissible degree ;
(c) damage to other parts of the works or to fittings or installed equipment as a result of major deformation of the load-bearing construction ;
(d) damage by an event to an extent disproportionate to the original cause.
2. Safety in Case of Fire
The construction works must be designed and built in such a way that in the event of an outbreak of fire:
- the load-bearing capacity of the construction can be assumed for a specific period of time ;
- the generation and spread of fire and smoke within the works are limited ;
- the spread of the fire to neighbouring construction works is limited ;
- occupants can leave the works or be rescued by other means ;
- the safety of rescue teams is taken into consideration.
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Sweden … has incorporated all 6 Essential Requirements of EU Construction Products Directive 89/106/EEC into its National Building Regulations … but has omitted the reference to the ‘safety of rescue teams’, i.e. Firefighter Safety. Why is that ?
Ireland, along with England & Wales, has not incorporated the EU CPD Essential Requirements into its National Building Regulations. There is no requirement, in Part B of the Building Regulations of either of these two separate jurisdictions, to consider Firefighter Safety in the design and construction of buildings.
In these three specific cases, taken as a simple example, this is a serious legal flaw … especially since the European Template, above, has existed since the late 1980′s !
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Let me illustrate how Building Design & Construction can make a major contribution to improved levels of Firefighter Safety …
A. Accessible Internal Staircases Having Sufficient Unobstructed Width
From a building user’s point of view … the success of a building depends, to a large extent, on the ‘quality’ of its circulation spaces. During the design process, however, an architect is typically concerned with the relationship between different functions and spaces … while, at the same time, he/she is shaping and moulding the internal and external forms of the building.
The full range of tasks and activities in these circulation spaces is rarely, if ever, considered by the building designer. The subject is not covered in Architectural Schools … and in later professional life, a reluctance to carry out Building Post-Occupation Evaluations (POE’s) reinforces this low level of awareness.
Some Tasks & Activities in Building Circulation Spaces …
- Access to the building’s spaces and use of its services and facilities ;
- Egress from the building during normal, everyday circumstances ;
- Independent Evacuation, in the event of an emergency ;
- Assisted Evacuation by others, or Rescue by Firefighters, for those building users who cannot independently evacuate the building, e.g. people with activity limitations ;
- Firefighter Access & Reconnaissance, in the event of an emergency ;
- Firefighter Attack, as they approach the proximity of the fire scene ;
- Firefighter Removal from the building, by colleagues, in the event of injury, impairment, or a fire event induced health condition ;
- Firefighter Withdrawal at the successful conclusion of firefighting operations.
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Colour photograph showing an injured, or impaired, firefighter being assisted by two colleagues in an upward staircase removal exercise. For reasons outlined in a previous post (2010-12-13) ... all three firefighters must continue to wear full Personal Protection Equipment (PPE) ... and use Self-Contained Breathing Apparatus (SCBA). Click to enlarge.
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The photograph above was extracted from this 2010 Poster Presentation …
Daniel DiRenzo, Cherry Hill Fire Department, New Jersey, USA
Building Fires – Personal Harness Use – Firefighter Removals
Click the Link Above to read and/or download PDF File (1.73 Mb)
No matter what the jurisdiction … no matter what Building Regulations do or do not require … it is clear that, during a ‘real’ fire emergency, patterns of circulation are not simple … and they cannot easily be segregated into categories with simple titles. They are complex … and, quite often, they overlap.
In the case of the firefighter removal on a staircase (shown above) … there is a necessity to consider another type of ‘Contraflow’ … where the injured, or impaired, firefighter with two of his/her colleagues rendering assistance are together moving away from the scene of the fire … while other firefighters are moving in the opposite direction, towards the fire.
In all but the most simple and smallest building types, this is what a Fire Evacuation Staircase should look like below … having a clear unobstructed staircase width, between handrails, of 1500 mm … with a stair going/tread of 300 mm, and a stair riser of 150 mm. Proper attention by the designer to Accessibility Design Criteria will also make the staircase far, far easier … and safer … for Firefighter Movement …
Colour drawing taken from International Standard ISO FDIS 21542, and associated inset photographs ... showing a Fire Evacuation Staircase suitable for All Building Types, which is designed for Firefighter Safety. The staircase is also designed to accommodate Building User Evacuation/Firefighter Contraflow, illustrated with an inset colour photograph ... the Rescue/Assisted Evacuation of People with Activity Limitations, also illustrated with an inset colour photograph ... and the Use of a Stretcher. The staircase design is based on the work of CJ Walsh. Click to enlarge.
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B. Accessible Façade Walkways in High-Rise Buildings
With today’s powerful drivers of greater energy conservation and efficiency in buildings, adaptation to climate change, and a paradigm shift in thinking on the reduction of adverse environmental impact by buildings … External Façade Design is rapidly evolving … becoming far more complex and, in many cases, comprising multiple ‘skins’.
Just check out this architectural feature, below, in an Osaka (Japan) High-Rise Hotel … which not only serves as an accessible route for evacuation and/or rescue in the event of a fire incident … but also permits much easier access for maintenance and window cleaning.
This architectural feature should be mandatory in the case of high-rise buildings with a single, central core …
Colour photograph showing the High-Rise Swissôtel Nankai in Osaka, Japan. Photograph by CJ Walsh. 2010-04-20. Click to enlarge.
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Colour photograph showing the External Walkway on the Building Façade of the High-Rise Swissôtel Nankai in Osaka, Japan. Photograph by CJ Walsh. 2010-04-19. Click to enlarge.
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Colour photograph showing the Hotel Room Evacuation Panel to the External Façade Walkway, which can also facilitate rescue by firefighters during a fire incident. Photograph by CJ Walsh. 2010-04-19. Click to enlarge.
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Building Design can make a substantial contribution to greater Firefighter Safety !!
BUT … who is raising the awareness of building designers about this issue ???
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WTC Building 7 – Fire-Induced Progressive Collapse on 9-11 !
2011-03-30: I like cryptic … because it can be very energy-efficient ! This was a serious ‘real’ fire incident, and an extensive post-event investigation took place …
Colour photograph showing the 47 Storey Building 7 in the World Trade Center Complex, New York ... before 9-11 (11 September 2001).
In August 2008 … the National Institute of Standards & Technology (USA) issued NIST NCSTAR 1A: ‘Final Report on the Collapse of World Trade Center Building 7′. A copy of the report can be downloaded from this Page on our Corporate WebSite … http://www.sustainable-design.ie/fire/structdesfire.htm
” Had WTC 7 been expressly designed for prevention of fire-induced progressive collapse, it would have been sufficiently robust to withstand local failure due to the fires without suffering total collapse.” [Page 58, 2008 NIST NCSTAR 1A]
Contained within Chapter 5 of that 2008 Report are 13 Recommendations (A-M) …
NIST NCSTAR 1A Recommendation A
NIST recommends that: (1) Progressive Collapse be prevented in buildings through the development and widespread adoption of consensus standards and code provisions, along with the decision support tools and design guidelines needed for their use in practice ;
Colour photograph showing the smouldering ruins of WTC Building 7, which had collapsed late on the afternoon of 9-11 (11 September 2001) ... a dramatic, full-scale demonstration of Fire-Induced Progressive Collapse.
I have written before about ‘Fire-Induced Progressive Collapse’ and a CIB W14 International Innovation & Research Project, which I lead. See the adjoining dedicated Page on this Blog … http://www.cjwalsh.ie/progressive-collapse-fire/ … for the background information.
Phase II of that project is examining …
- Gaps in our current understanding and practice of Structural Fire Engineering ;
- Institutional Barriers delaying the international response to NIST Recommendation A above ;
- A Rational Route Forward to meet that complex Technical Challenge.
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CIB W14 Commission Meeting in Paris, France – 11 April 2011
C.J. Walsh Research Project Presentation
Phase II: ‘Structural Reliability & Fire-Induced Progressive Collapse’
Click the Link Above to read and/or download PDF File (1.7 Mb)
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The CIB W14 International Innovation & Research Project’s Route Forward is as follows …
1. Mainstream the Language, Practices, Procedures and Design Methodologies of Fire Science & Engineering … so that other design disciplines can appreciate that Ethical Fire Science & Engineering also has a sound, modern, rational and empirical basis. [CIB W14 Task]
2. Raise awareness about the primacy, and encourage the wide acceptance, of Fire Serviceability Limit States in Structural Fire Engineering … and the universal requirement that buildings must resist Fire-Induced Progressive Collapse and, in addition, also resist Disproportionate Damage. [CIB W14 WG IV Task]
3. Indicate the need for, and foster the development of, innovative Thermal Insulation Structural Fire Protection Systems which are durable, can resist mechanical damage in ambient and fire conditions, and can be properly shown to be ‘fit for their intended life-cycle use’. [Industry Task]
4. In steel construction … depending on its location in a building and having designed sufficiently robust connections for fire conditions … show why, where and how Thermal Insulation must now be used to maintain a Lower Temperature in the Steel … in order to ensure that its deformations (+/- deflection, expansion and distortion, etc.) remain within design parameters … both during the fire and, for a minimum period afterwards, during the ‘cooling phase’. [CIB W14 WG IV Task]
5. Encourage the development of Fire Engineering Design Guidelines for new and existing buildings, along with the Decision Support Tools needed for their use in practice … to support #2 and #4 above. And propose how Existing Code/Regulation Provisions and Standards should be suitably updated and revised. [International Fire Science & Engineering Community Task]
Colour graphic presenting an overview of the 9-11 (11 September 2001) Incident at the World Trade Center Complex, in New York.
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Dublin IFE Fire Conference – Sustainable Fire Engineering !
Nothing less than a complete Paradigm Shift to Sustainable Fire Engineering is now needed … because it is Necessary … because it is Inevitable … because it is The Future !!!
This process will not proceed, however, unless the International Fire Science & Engineering Community begins to communicate and engage, meaningfully, with the Mainstream Construction Sector … where this process is already well advanced.
One Organization in our community has recently decided to bite the bullet … CIB (International Council for Research & Innovation in Building & Construction) … where Working Commission 14 (W14) – ‘Fire Safety’ … agreed, at a meeting in Zurich, to significantly expand and elaborate its own Scope … please note the keywords in bold text …
A CIB Working Commission … W14 is an international, multi-stakeholder, trans-disciplinary, pre-normalization forum for discussion, and action, on research and innovation in Fire Science and Engineering for the design, construction and operation of a Safe and Sustainable Built Environment.
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Colour image showing the Title Page of CJ Walsh's Presentation at the Institution of Fire Engineers (Ireland Branch) Annual Fire Conference ... which will be held on Wednesday, 20th October 2010, in Dublin. Click to enlarge.
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This will be my important message on Wednesday next, 20th October 2010, when I address the Institution of Fire Engineers (Ireland Branch) Annual Fire Conference … which will be held in the Dublin Fire Brigade Training Centre, Marino, Dublin 1 … beginning at 09.30 hrs in the morning.
Institution of Fire Engineers (Ireland Branch)
2010 IFE Annual Fire Conference Brochure
Click the Link Above to read and/or download PDF File (326kb)
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Three Powerful Pulling Forces for Change … or should I say Dragging Forces, with a lot of kicking and screaming involved (!) … will have a direct impact …
1. Sustainable Design
The interior view shown below is not that of a Sustainable Building … but of a Modern Architectural Icon, designed by the Master Architect Mies van der Rohe towards the end of the 1920′s … way back in the last century ! Two innovative architectural concepts are elegantly illustrated in the photograph …
- Open Planning – one space ‘flows’ into the next without interruption by a physical barrier … drawing the eye and encouraging movement. In this particular building … a building of architectural, cultural and historical importance … any attempt to impose ‘fire compartmentation’ on the layout would be utterly ridiculous !
- Separation of Building Structure & Fabric – notice the column in the foreground. This is quite unlike the massive form of building construction in the past !
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Colour photograph showing an Interior View of the Barcelona Pavilion, designed by the German Architect Ludwig Mies van der Rohe in 1929. Photograph taken by CJ Walsh. 2009-03-20. Click to enlarge.
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Fire Engineering is still trying to grapple … unsuccessfully … with innovative approaches, dating from the early part of the 20th Century, to Architectural Design. In the 21st Century, Sustainable Design – not Green Design – involves a far more radical approach to Design, the use of Building Materials, and Construction. In the face of this much greater challenge, Fire Engineering must begin to respond effectively … with creativity and imagination. There is no other alternative !
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2. Cul-de-Sac of Current Fire Engineering
Working in Building Control at the time … I encountered the Typical Building Detail shown below in an early 1990′s Dublin Hotel Extension Project … comprising a 10 metre span steel beam … with non-loadbearing steel stud partitioning beneath, separating a corridor from bedrooms … each with 1 Hour’s Fire Resistance. During a fire and long before the period of 1 Hour has elapsed … that steel beam will have deflected by a considerable dimension. What happens, then, to the non-loadbearing steel stud partition, below, and its fire resistance performance ??? This makes no sense.
Does current Fire Engineering have a robust rational and empirical basis … or is it just one remove from Voodoo and Witchcraft ??
Black and white 'concept' drawing, with a small touch of colour, showing a typical detail in an early 1990's Dublin Hotel Extension Project ... of a 10 metre span steel beam ... with non-loadbearing steel stud partitioning beneath, separating a corridor from bedrooms ... each with 1 hour's fire resistance ?!? Drawn by CJ Walsh.
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3. NIST(USA) Recommendations on the 9-11 WTC Building Collapses
Determined resistance by Vested Interests … a Lack of Institutional Capacity, i.e. failure to be able to properly anticipate, or to be adequately prepared, and/or to respond effectively and in a timely manner to major fire incidents … and a small element of the ‘Issue Attention Cycle’, where considerable investment in time and resources were necessary to make real progress on the issues thrown up by 9-11 but, unfortunately, governmental and public attention soon waned and dissipated … shifting to new problems, e.g. the Illegal Iraq ‘Crusade’ … have all contributed to a situation where there has been little in the way of substantive implementation of the Recommendations contained in the 2005 and 2008 NIST(USA) Reports on the 9-11 WTC Buildings 1, 2 & 7 Collapses … in the United States of America, Europe … or anywhere else.
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Colour photograph of the World Trade Center Complex in New York, taken at the time of the 2nd Plane Impact during the morning of Tuesday, 11th September 2001. Click to enlarge.
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That is not our approach, here, at FireOx International – the Fire Engineering Division of Sustainable Design International Ltd. Instead, we have decided to present all of the NIST Recommendations … to our readers … in a Series of Posts on this Technical Blog.
Sustainable Fire Engineering HAS a robust rational and empirical basis !
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CIB W14: ‘Fire Safety’ – Recent Important Meeting in Zurich
Established in 1953 … CIB (International Council for Research & Innovation in Building & Construction) is an Organization whose objectives are to stimulate and facilitate international co-operation and information exchange between research institutes and research-oriented individuals in the Global Construction Sector.
In 2010 … CIB is now a worldwide network of over 5000 experts … from about 500 member organisations active in the research community, in industry or in education … who co-operate and exchange information in over 50 CIB Working Commissions and Task Groups, covering all fields in building and construction related research and innovation.
CIB Working Commissions initiate projects for the purposes of R&D and information exchange … organise meetings and issue publications. These meetings can be Commission meetings for members only, or international symposia and congresses open to everyone. Publications can be proceedings, scientific or technical analyses and international state-of-the-art reports.
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CIB Working Commission 14 (W14) recently held an important meeting at EMPA Headquarters (Swiss Federal Laboratories for Materials Science & Technology) in Zurich, Switzerland … on Monday and Tuesday, 30th and 31st August 2010. The meeting was very well attended … and the discussions, throughout, were lively, interesting and challenging !
The Co-Ordinator for W14 … Prof. Dr. George Hadjisophocleous, Carleton University, Ottawa, Canada … is Professor in the Department of Civil & Environmental Engineering and Holder of the Industrial Research Chair in Fire Safety Engineering.
This Meeting was Important for Two Reasons …
1. Working Commission 14 Title & Description Revised
Early on the Monday morning, 30th August 2010 … under the Agenda Item: ‘Overview of CIB W14 Mission Statement’, I had proposed that the Commission should review the current, rather outdated Mission Statement. A draft text, which I had submitted many months before the Zurich meeting, was used as the basis for our discussion.
It was a major step forward that the Revised Title & Description for Working Commission 14 received such enthusiastic support, and endorsement …
Revised CIB W14 Title: ‘Fire Safety’
This will make the work of Working Commission 14 more accessible to the many built environment design, construction and operation related disciplines outside the international fire science and engineering community … and to the rest of CIB, which will facilitate greater communication and co-operation with other CIB Working Commissions and Task Groups.
The revised title will also foster and promote better co-ordination with International Standards Organization (ISO) Technical Committee 92: ‘Fire Safety’.
Revised CIB W14 Description:
A Working Commission of CIB (International Council for Research and Innovation in Building & Construction) … CIB W14 is an international, multi-stakeholder, trans-disciplinary, pre-normalization forum for discussion, and action, on research and innovation in Fire Science and Engineering for the design, construction and operation of a Safe and Sustainable Built Environment.
During the Meeting, it was made crystal clear that the Built Environment did not just mean ‘buildings’ … and that Sustainable referred to all Aspects of Sustainable Development, and not merely to its environmental aspects.
All Aspects of Sustainable Human & Social Development must be taken into account at the same time and with equal weight.
This is an important foundation for the International Fire Science and Engineering Community … as it begins to communicate and engage, meaningfully, with the Mainstream Construction Sector about discussions on Sustainable Design, Construction & Operation (including management and servicing, etc.).
2. Tighter Scope for the New CIB W14 Fire Research Projects
During the remainder of the 2-day meeting … Overview Presentations were made, Progress was reported, and Lengthy Discussions followed on the following Fire Research & Innovation Projects listed below.
I will only make a few pertinent comments about some of the Projects …
a) Design Fires
During the discussion about this Project, I firmly made the point that proper consideration must now be given to ‘Maximum Credible Fire Scenario’ … as recommended in the 2005 NIST(USA) Final Report on the 9-11 World Trade Center Towers 1 & 2 Collapses. See Footnote 26, on Page 208 of the 2005 Report, for the definition of this concept.
b) Fire Performance of Materials
I drew the meeting’s attention to the serious problem of Hazardous Plasterboard/Drywall manufactured in China. See the Post on this Blog … http://www.cjwalsh.ie/2010/05/u-s-consumer-organization-identifies-hazardous-plasterboards/
c) Structural Performance in Fire – Connections
d) Structural Reliability & Fire-Induced Progressive Collapse
I am the Leader for this International Project … and our progress can be followed on a separate Page of this Blog … http://www.cjwalsh.ie/progressive-collapse-fire/
e) Human Behaviour & Abilities in Fire Emergencies
For reasons which I cannot discuss here, it was considered to be absolutely essential that this Project proceed with all haste … and full speed !
Two Issues in Particular …
In relation to the problems People with Activity Limitations (2001 WHO ICF) face in preparation for, during and after fire emergencies in buildings … Existing Standards at International and National Levels have been shown …
- to lack any proper awareness or understanding about ‘disability’ ;
- to present a Design, Construction and Management Response to the problems experienced by People with Activity Limitations in preparation for, during and after fire emergencies in buildings … which is far, far less than adequate … or, to put it in more direct language … a Response which is entirely unacceptable … on technical, social and legal grounds.
It must be clearly noted that the 2006 United Nations Convention on the Rights of Persons with Disabilities became an International Legal Instrument on 3rd May 2008. As a result of Article #11 … in future, to give just one simple example, fire evacuation routes in buildings must be designed to be ‘accessible-for-all’. This is an entirely new concept for most fire engineers … in all countries !
On my proposal, therefore, the Project Title was amended to include Human Abilities.
Secondly … and further to its introduction during my presentation at an earlier CIB W14 Meeting in Lund University, Sweden, during April 2009 … this Project will also examine the concept of ‘Maximum Credible User Scenario’, i.e. user conditions which are also severe, but reasonable to anticipate … meaning …
- the Number of people using a building increases, on occasions which cannot be specified, to 120% of calculated maximum building capacity ;
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- 10% of people using the building (occupants, visitors and other users) have an Impairment (visual or hearing, physical function, mental or cognitive, psychological, with some impairments not being identifiable).
Leadership of this Project is held by Douglas Hillhouse, Organizer of the Fire Risk Engineering Programme in the School of the Built & Natural Environments, Glasgow Caledonian University.
f) Fire Engineering Performance Criteria
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Watch this space … more interesting, pre-normative fire engineering developments are in the pipeline !
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Evacuation Chair Devices – Fire Engineering for All in Buildings ?
2010-06-06: This post has been running around in the back of my mind for quite some time … and I know now, for far too long ! But recently, my patience with certain manufacturers and suppliers of evacuation chair devices has reached its limit.
In relation to Building Users … previous posts have examined the technical term: Place of Safety (see the post dated 2009-10-24) … and why this concept is an essential starting point in the development of any practical … and comprehensive … fire engineering strategy for a building.
Previous posts have also explored the complex issue of Areas of Rescue Assistance in a building (see posts dated 2009-03-10 & 2009-03-17).
For the purposes of this discussion, now, a clear statement of Fire Engineering Design Objectives is required …
- Evacuation for All Building Users … with an assurance of health, safety and welfare protection during the course of that evacuation.
- Sustain Building Serviceability during Evacuation … at the very least, while people are waiting in Areas of Rescue Assistance … and, until all of those people can be rescued by Firefighters and can reach a Place of Safety.
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We are rapidly approaching the day when all lifts/elevators in a building must be capable of being used during the course of a fire incident. AND … these lifts/elevators must be situated so that … alternative, safe and intuitive means of evacuation … are effectively presented to all building users.
Greedy vested interests continue to impede the onset of that inevitable day.
Another surprising barrier to the implementation of this goal, however, is the sloppy and incompetent drafting of fire engineering design standards and codes of practice. Previous posts have discussed … and shown … some of the serious problems with British Standard BS 9999 – Code of Practice for Fire Safety in the Design, Management and Use of Buildings (2008).
A ‘Restricted’ Architectural Vocabulary is yet another barrier to implementation. High-Rise and/or Complex Buildings are still typically being designed for Access … not Evacuation ! This fault very definitely lies with the architectural and engineering schools throughout Europe.
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Until all lifts/elevators in a building are capable of being used during the course of a fire incident … there is an obvious and pressing need for a fire engineering design solution which involves the installation, maintenance and proper use of Approved Fire Evacuation Chair Devices … which need to be powered or manual depending upon the particular circumstances in a building !
AND, even when all lifts/elevators are capable of being used during the course of a fire incident … because lifts/elevators must always undergo routine servicing and maintenance and they will not, therefore, be in operation for short periods of time … there will still be an obvious need for Approved Fire Evacuation Chair Devices. So, these fire-evacuation related products should never be regarded as a wasted investment !
I have repeated the word ‘Approved’ because, unfortunately, since these are also disability related products … insufficient attention, and emphasis, is given to Product Approval in this Market Sector, i.e. showing that the product is ‘fit for its intended use, in the location of use’.
At the most basic level imaginable … National Building Regulations in the European Union Member States, and E.U. Safety at Work and Product Liability Legislation … all demand Product Approval.
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Performance Requirements for Fire Evacuation Chair Devices: Fire Evacuation Chair Devices, powered or manual, must be capable of …
- being safely and easily operated ;
- carrying people of large weight (150 Kg minimum) ;
- going down staircases which, in existing buildings of historical, architectural and cultural importance, may be narrow and of unusual shape ;
- travelling long distances horizontally … in a robust and stable manner … both within a building … and externally, perhaps over rough ground … in order to reach a Place of Safety.
When going up a staircase is necessary in order to reach a Place of Safety, a powered evacuation chair device must be provided !
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Fire Evacuation Staircases: A vivid image, with a few accompanying words, are necessary …
Unlike the incredible scene shown in the colour photograph above ... Fire Evacuation Staircases must be suitable for Safe, Intuitive and Unhampered Building User Evacuation, Firefighter Contraflow and the Assisted Evacuation of People with Activity Limitations. A Minimum Clear Width of 1.5 Metres (from edge of handrail to edge of handrail !) is required. Click to enlarge.
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Fire Evacuation Chair Devices & What To Avoid: Can you spot the Evacuation Chair Device in the first photograph below ?
Colour photograph showing a Fire Evacuation Chair Device Installation at Dublin Airport, Ireland. On so many levels and in so many ways, this 'decorative' installation ... intended to demonstrate that an organization is complying with legislation ... will prove to be, in the event of a real fire emergency, SO wrong and unworkable. Photograph taken by CJ Walsh. 2008-04-04. Click to enlarge.
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Colour photograph showing a Manual/Gravity Fire Evacuation Chair Device in operation. Transfer from a wheelchair to this type of device at the top of a staircase can be difficult and hazardous ... it can only travel down a staircase, using gravity (never up, against gravity !) ... and during horizontal travel, it is shaky and unstable. Click to enlarge.
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Fire Evacuation Chair Devices & Issues To Carefully Consider: Modern wheelchairs come in all shapes, sizes and styles … are highly adapted by their owners … and can be very expensive. Why is it a surprise, therefore, to learn that most wheelchair users will not want to abandon their expensive personal property, i.e. the wheelchair, in the event of a real fire emergency.
The answer, of course, is PROPER CONSULTATION with All Building Users (where these are known !) during the preparation of a Fire Defence Plan for a Building.
The following photographs illustrate different aspects of the capability of Powered Fire Evacuation Chair Devices …
Colour photograph showing a Powered Fire Evacuation Chair Device in operation. This particular device facilitates evacuation, down and up a staircase, using the person's own manual wheelchair. Having completed its task at the bottom (or top !) of a staircase ... the device can be quickly released for use by another person who needs assistance on the staircase. Throughout this process, wheelchair users move independently to a Place of Safety. Click to enlarge.
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Colour photograph showing another Powered Fire Evacuation Chair Device. This particular device facilitates evacuation of an adapted manual wheelchair, which may (or may not !) be the person's own wheelchair. It also facilitates travel on narrow or unusually shaped staircases. Click to enlarge.
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Colour photograph showing a Powered Fire Evacuation Chair Device in operation. This particular device facilitates evacuation, down and up a staircase. It is also robust and stable while travelling horizontally ... both within a building ... and externally, perhaps over rough ground ... in order to reach a Place of Safety. Click to enlarge.
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Product Approval in the European Union Single Market: Fire Evacuation Chair Devices must be permanently CE Marked … including the product itself, any cover (such as that shown in the Dublin Airport photograph above), all product literature, and any product packaging.
It is not acceptable to print the CE Mark on an adhesive label … and then stick the label to the product ! Correct informative text must always accompany a CE Mark !
Please note that the CE Mark is not a Safety Mark. A CE Mark denotes conformity with the Essential Requirements of a single, specific European Union Directive.
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END
2009 Camberwell Fire – Today’s Fire Engineering Challenges
In Ireland, it is rarely the case that there is an opportunity to practice Rational, Evidence-Based Fire Engineering … and to apply its Principles in a manner which is both professional and project-specific. The grim reality of everyday fire consultancy revolves around playing ‘cat and mouse’ with current national building and fire regulations/codes … with ‘cost effectiveness’, i.e. to achieve a defined objective at the lowest cost, or to achieve the greatest benefit at a given cost … being the real, hidden driver behind such dangerous games ! Who wants to hear that the Irish Fire Safety Certification System is little more than a charade … an elaborate, resource consuming paper exercise … made all the more meaningless because Part B: ‘Fire Safety’ (of the Second Schedule to the 1997 Building Regulations, as amended) is isolated from a necessary and vital consideration of the other Parts, particularly Parts A: ‘Structure’; D: ‘Materials & Workmanship’; K: ‘Stairways, Ladders, Ramps & Guards’; and M: ‘Access for People with Disabilities’ ?
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Colour photograph showing an external view of Lakanal House, Sceaux Estate, Camberwell, London (GB) ... after the Fatal Fire which occurred at 16.19 hrs, on 3rd July 2009. The fire was caused by a faulty television set, and resulted in the loss of 6 lives, with 15 residents and 1 firefighter left injured. London Fire Brigade was required to assist the evacuation of a further 40 building occupants to safety. Along with the serious loss of life, and the large number of injured people ... over 90 families had to vacate their flats.
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Discussing the Principles of Fire Engineering … and elaborating on the significant differences between the limited Fire Safety Objectives of legal regulations/codes … and the much broader range of Fire Engineering Design Objectives intended to fully protect social wellbeing and the interests of clients/client organizations, i.e. to properly protect their asses and their assets, in the event of a fire … is a constant, tortuous, but rewarding, struggle. Masochism does help !
However, the 2009 Fire in a High-Rise Flat Complex at Camberwell, London (GB) … from just looking at the photograph above and reading available information about the spread of fire internally … raises some challenging fire engineering issues for building designers, property managers and construction organizations.
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1. Reliability of People Strategies in a Fire Emergency ?
In spite of the People Strategies elaborated in current Fire Codes/Regulations/Standards … it is totally and utterly irresponsible to advise people to wait in their own flats/apartments during a fire incident, or to develop fire safety strategies based on this approach … unless the confidence level (of ‘Competent Persons’ in Control … managers, designers and builders … of the flat/apartment complex) with regard to the following aspects of construction is very high …
- reliability of both passive and active fire protection measures ;
- reliability of fire compartmentation (see below) ;
- reliability of not just the building’s structural stability, but also its serviceability, during the fire and for a minimum period of time afterwards, i.e. the ‘cooling’ phase.
Competent Person: A person capable of making sound value judgements in the area of professional endeavour in which he/she possesses profound knowledge, understanding and practical experience.
Fire Codes/Regulations/Standards, wherever or whatever their origin, are NOT Infallible … and it is unbelievably mind-boggling, and sad, to witness a blind and unquestioning faith in such documents !
Looking beyond the headline figure of 6 Fatalities in the 2009 Camberwell Fire … adequate attention should also be focused on the 16 Injured … comprising building occupants and firefighters … the lengthy disruption of community wellbeing resulting from the fire … 90 Families had to be re-located … and, of course, the tremendous amount of direct and indirect damage to property and the environment. And, I wonder … how did the more vulnerable occupants … and there may also have been visitors present in the complex at the time … cope in this emergency situation ?
This is why Fire Safety, Protection and Evacuation for All must be a Priority on any ‘Sustainability’ Agenda.
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2. Independent Technical Control of AHJ Construction ?
I have said this before, but it is worth repeating here again … Self-Regulation Is No Regulation ! Surely this lesson has been burnt into our souls, following the recent scandals, financial and otherwise, in Ireland ? National and Local Authorities Having Jurisdiction (AHJ’s) … Government Departments & Agencies, Semi-State Organizations, a myriad of Qwangos, the Office of Public Works and Local Authorities are complacent, careless and stubborn concerning proper compliance with even the minimal performance requirements specified in fire regulations, codes and standards.
The 2005 & 2008 National Institute of Standards & Technology (USA) Reports on the 9-11 WTC Incident in New York presented us with some stark language … and a set of important Recommendations which must be heeded …
‘ NIST recommends that such entities be encouraged to provide a level of safety that equals or exceeds the level of safety that would be provided by strict compliance with the code requirements of an appropriate governmental jurisdiction.
To gain broad public confidence … NIST further recommends that as-designed and as-built safety be certified by a qualified third party, independent of the building owner(s). The process should not use self-approval for code enforcement in areas including interpretation of code provisions, design approval, product acceptance, certification of the final construction, and post-occupancy inspections over the life of the buildings.’
[2005 NIST Final Report on WTC 1 & 2 Collapses - Recommendation No. 25]
Later posts, here, will examine the individual NIST Recommendations in more detail.
However … many individuals and organizations, with vested interests, are still trying to discredit and/or ignore the Recommendations contained in the 2005 & 2008 NIST Reports on the WTC 9-11 Incident. British Standard BS 9999:2008 is a typical case in point … a document which is slowly seeping into the marrow of the Irish Fire Establishment. The complete and abject failure to consider any of the NIST Recommendations during the long development of this British Standard, or even to reference the Reports in the Standard’s Bibliography … was an inexcusable and unforgivable technical oversight. The result was … and remains … a sloppy, crassly inadequate, deeply flawed and discriminatory national fire safety standard. The British Public deserves far better !
At this stage … reluctantly … I must invite the Chair of British Standards Institution Committee FSH/14, Mr. David B. Smith, to seriously re-consider his position.
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3. Fire Resistance, Compartmentation & Fire-Induced Progressive Collapse ?
Every person participating in the design, construction, management or operation of a building, no matter how simple or complex, must have a working knowledge and proper understanding of the Fire Engineering Principle of Fire Compartmentation:
The division of a building into fire-tight compartments, by fire and smoke resisting elements of construction, in order …
- to contain an outbreak of fire ;
- to prevent damage, within the building, to other adjoining compartments and/or spaces ;
- to protect a compartment interior from external fire attack, e.g. fire spread across the building’s facade or from an adjacent building ;
- to minimize adverse, or harmful, environmental impacts outside the building.
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BUT … But … but … buildings are no longer designed and constructed, today, as they were in the 18th or 19th Centuries …
In a fire situation, Fire-Induced Progressive Collapse may commence before any breach of ‘integrity’ occurs in the boundary of such a Fire Compartment, i.e. the building compartment of fire origin.
Fire-Induced Progressive Collapse: The sequential growth and intensification of distortion, displacement and 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.
… which is related to, but distinguishable from …
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.
Structural Fire Engineering: Those aspects of fire engineering concerned with structural design for fire, and the complex architectural interaction between a building’s structure and fabric, i.e. non-structure, under conditions of fire and its aftermath.
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AND … And … and … a designer of a Sustainable Building will want to utilize … in order to conserve energy … natural patterns of air movement for heating or cooling. This means that it will be necessary to have gaps between elements of construction which are continuously open … in direct conflict with the Principle of Fire Engineering just quoted above !
What happens when this sort of conflict … or lack of resolution (!) … occurs in modern, highly energy-efficient construction projects ? At the final stages of approval/certification … the Fire Prevention Officer will insist on following the outdated prescriptive approach in his/her rulebook. In other words, he/she will illegally apply the guidance text of Technical Guidance Document B as if it were prescriptive regulation. Fire Compartmentation will be uncompromisingly slapped onto ‘unresolved’ areas of a completed building design … to achieve the limited Fire Safety Objectives of Building Regulations … and the fire safety related construction will probably be badly executed, anyway, because the un-supervised sub-contractors of sub-contractors of sub-contractors couldn’t care less if it goes one way or the other ! The outcome is … nobody wins !!!
In Sustainable Building Design, therefore, Fire Resistance (a ‘passive’ protection concept) must not only be extended to consider a complementary relationship with ‘active’ fire protection concepts, but be stretched … ‘intelligently’ … to embrace the concept of ‘non-construction’ …
Building Sterile Space (Fire): An open space of sufficient and appropriate extent which is designed to retain an exceptionally low level of fire hazard and risk, and is ‘intelligently’ fitted with a suitable fire suppression system – in order to resist and control, for a specified time during a fire, the advance of heat, smoke and flame.
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.
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END
Building Fire Emergencies – What is a ‘Place of Safety’ ?
As I have travelled around … not just Ireland, but many other countries as well … it still remains a puzzle to me, today, why so many Fire Emergency Assembly Areas are located just outside the main entrance of a building. These locations are not safe in a ‘real’ fire emergency … and they should not even be used for the purposes of test/drill evacuations !
Is the guidance contained in current Building & Fire Regulations, Codes and Standards on what is a ‘Place of Safety’ in a fire emergency clear, simple, direct and precise ? Are you joking ? No way ! Let us take a few examples close to home …
In Ireland:
When you look at the array of different Technical Guidance Documents (Building Regulations) at the same time … TGD B (Fire Safety) is way out of proportion, in size, compared to all of the others. You would expect, therefore, to find exactly what you were looking for in that document. Wouldn’t you ?
TGD B (2006), Paragraph #1.0.9 – Definitions
Place of Safety
A place, normally in the open air at ground level, in which persons are in no danger from fire.
Clear as mud ! If there is a fire on O’Connell Street in Dublin … a person is safe on Patrick Street in Cork ! But, how is any Building or Facilities Manager expected to work with such a vague definition ?
In England & Wales:
No practical definition, as such, is readily provided. The nearest thing to a definition is an amalgam of the following …
Building Regulations, Requirement B1 – Means of Warning & Escape
The building shall be designed and constructed so that there are appropriate provisions for the early warning of fire, and appropriate means of escape in case of fire from the building to a place of safety outside the building capable of being safely and effectively used at all material times.
Approved Document B: Volume 1 – Dwellinghouses & Volume 2 – Buildings Other Than Dwellinghouses
The ultimate place of safety is the open air clear of the effects of the fire.
British Standard BS 9999 : Code of Practice for Fire Safety in the Design, Management & Use of Buildings : 2008
Place of Ultimate Safety
Place in which there is no immediate or future danger from fire or from the effects of a fire.
Again … all as clear as mud ! Again … how is any Building or Facilities Manager expected to work with such vague guidance ? Have you also noticed the additional obfuscation introduced by use of the word ‘ultimate’ in BS 9999 ?
It is hard to escape the conclusion that what is urgently needed is a fundamental transformation and re-shaping of the tired, antiquated and flawed ad-hoc assembly of prescriptive ‘solutions’ contained in current national building and fire regulations, codes, standards and administrative provisions … whatever their origin !
Now … try this for clarity, simplicity, directness and precision …
Place of Safety (Fire Incident in a Building, No Explosion Hazard*)
Any location beyond a perimeter which is [100]* metres from the fire building or a distance of [10]* times the height of such building, whichever is the greater
and
where necessary and effective medical care and attention can be provided, or organized, within one hour of injury
and
where people can be identified.
* Where there is a Risk of Explosion … multiply the numbers in square brackets above by 4.
Was that good for you ?
Furthermore …
The Route to any Place of Safety must be Accessible for All Building Users, including people who use wheelchairs, the visually impaired, frail older people, women in the later stages of pregnancy, children, etc., etc.
Colour photograph showing a Typical Scene at a Building Fire Emergency, with Fire Service Vehicles and Personnel in operation mode. The haphazard arrangement of firefighting water hoses on the ground makes access difficult for many Building Users to a 'Place of Safety' which is remote from the Fire Building.
With regard to an Adequate, never mind a Proper, Awareness of Disability-Related Issues at a Fire Scene … it is shocking to realize how almost non-existent this is among Fire Services … not just in Ireland and Britain … but in the rest of Europe and North America as well.
Even a hint of criticism will usually … not always … meet the Neanderthal Fire Service Response: “Have you ever been in a ‘real’ building fire ?”
My Response is: “Do you have to be a hen to know when an egg is bad ?”
This discussion will continue later … have no doubt … that is a promise !
END
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