Archive for November, 2011
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: SOME PRELIMINARY COMMENTS …
1. In the First Post of this Series, I wrote …
” 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 … “
Sustainable Fire Engineering must also be ‘person-centred’ … i.e. a design process (in whatever architectural or engineering discipline) which places ‘real’ people at the centre of creative endeavours and gives due consideration to their responsible needs, and their health, safety, welfare and security in the Human Environment.
In order to prolong, and if at all possible, significantly extend the Life Cycle of a Sustainable Building beyond 100 years … Fire Engineers must begin to feel at ease … and be comfortable … with the following mainstream Sustainable Design Concepts …
Flexibility: The extent to which a building interior is designed, when new, to be capable of being easily modified at any later stage during the life cycle of that building – with minimal cost and user inconvenience – because of a person’s changing living or working needs.
Adaptability: The extent to which a building, or a building component, is designed when new, or capable of being easily modified at any later stage, to meet the changing life and living needs of the broad range of potential users, who may or may not have activity limitations, or may develop a health condition during the life cycle of that building or component.
Accessibility of a Building: Ease of independent approach, entry, egress (during normal ambient conditions), evacuation (in the event of an emergency) and/or use of a building and its services and facilities, by all of the building’s potential users - with an assurance of individual health, safety and welfare during the course of those activities.
2. Group 5 of the 2005 NIST WTC Recommendations is, by far, the most important … introducing some innovative concepts of ‘real’ evacuation … with nothing too startling. Contrary to the impression given by NIST … these Recommendations are equally valid for complex building types and, in reality, for all but the most simple of low-rise buildings. It is interesting to note, however, that when discussing fire behaviour or structural performance in fire, for example … the NIST texts are confident and direct. Here, when dealing with ‘people’ issues … not so confident, prone to some rambling … and lacking clarity.
Shortly after the 2005 NIST Report (NCSTAR 1) was published, I stated the following on the SDI Corporate WebSite … at this FireOx International Page … http://www.sustainable-design.ie/fire/structdesfire.htm …
” In its treatment of ‘disability’ and ‘people with activity limitations’, the Report does not go far enough, and is seriously flawed.”
Let me explain why …
As you go scan down through NIST’s Recommendations 16-20, you will encounter 1 reference to ‘mobility impaired occupants’ and 2 references to the impersonal ‘mobility impaired’. IF (and that is still a very big ‘if’, because there is still so much rabid resistance to this topic !) … a New Post-9/11 Evacuation Model, or Construct, Dealing with ‘Disability’ is being developed … all of the major impairment groupings (i.e. visual impairment, hearing impairment, physical function impairment, mental/cognitive impairment, and psychological impairment) must be added to the mix from the beginning. In other words, our proper focus of attention must be ‘people with activity limitations’ … not just people with disabilities, but also frail older people (not all older people !), children under the age of 5 years, women in the later stages of pregnancy, people with a health condition, etc.
And … because of the social stigma still firmly attaching to ‘disability’ … many building occupants/users will not self-identify … not even if their lives depend on it !
Concentrating on one group only, i.e. people with mobility impairments, is simplistic and entirely inadequate … and we will all end up, in a few years time, having to graft on a consideration of the other impairment groups.
This is exactly what has already gone wrong with the development of Accessibility Design Guidance during the last 30 years … where ‘people with visual or hearing impairments’ received merely token attention … and ‘people with cognitive or psychological impairments’ received no attention at all ! And … we are now grappling with the challenge of having to graft on additional texts to try to re-balance International Design Guidance on Accessibility of the Built Environment. Been there – done that – I have all of the t-shirts !!
People with Activity Limitations (English) / Personnes à Performances Réduites (French): Those people, of all ages, who are unable to perform, independently and without aid, basic human activities or tasks – because of a health condition or physical/mental/cognitive/psychological impairment of a permanent or temporary nature.
The above Terms (in English and French) include …
- wheelchair users ;
- people who experience difficulty in walking, with or without a facilitation aid, e.g. stick, crutch, calliper or walking frame ;
- frail, older people ;
- the very young (people under the age of 5 years) ;
- people who suffer from arthritis, asthma, or a heart condition ;
- the visually and/or hearing impaired ;
- people who have a cognitive impairment disorder, including dementia, amnesia, brain injury, or delirium ;
- women in the later stages of pregnancy ;
- people impaired following the use of alcohol, other ‘social’ drugs e.g. cocaine and heroin, and some medicines ;
- people who suffer any partial or complete loss of language related abilities, i.e. aphasia ;
- people impaired following exposure to environmental pollution and/or other irresponsible human activities, e.g. war and terrorism ;
- people who experience a panic attack in a fire situation or other emergency ;
- people, including firefighters, who suffer incapacitation as a result of exposure, during a fire, to poisonous or toxic substances, and/or elevated temperatures.
3. So … what provision should be made for ‘people with activity limitations’ in typical Fire Engineering Design Projects ?
Equivalent to the concept of Maximum Credible Fire Scenario, which has already been discussed in this Series … at FireOx International, some years ago, we developed the concept of …
Maximum Credible User Scenario
Representing building user conditions which are also severe but reasonable to anticipate …
a) 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) ;
[ This performance indicator appears in ISO FDIS 21542: 'Building Construction - Accessibility & Usability of the Built Environment', which will soon be published.]
b) The Number of People Using a Building increases, on occasions which cannot be specified, to 120% of designed/calculated maximum building capacity.
[ Generally ... the fire safety related texts contained in ISO 21542 are based on the 2005 & 2008 NIST WTC Recommendations.]
4. With regard to Recommendation 17 below, and NIST’s reference to the widths of evacuation staircases and door openings, etc … fire codes and regulations, fire authorities having jurisdiction (AHJ’s), and even the fire services themselves … still have a crazy mixed-up approach to defining the width of these building features … an approach which I am not even going to attempt to repeat ! Forget it !!
Without Exception … all understandings of Evacuation Route Width, Evacuation Staircase Width and Evacuation Door Opening Width … must be harmonized with the following definitions of Unobstructed Width …
Unobstructed Width – General
Free, unobstructed space – clear of all obstacles below a height of 2.1 metres above finished floor level – necessary for passage along a circulation route, or other route component, e.g. a staircase.
[ For example ... the Unobstructed Width of a Staircase is the clear dimension from the edge of one handrail to the edge of the opposite handrail ... and there is always a continuous handrail on each side of an evacuation staircase ! ]
Unobstructed Width – Door Opening
Free, unobstructed space – clear of all obstacles below a height of 2.0 metres above finished floor level – necessary for passage through a door opening, measured when the door leaf is opened to an angle of 90°, or when a sliding or folding door leaf is opened to its fullest extent.
[ For example ... the Unobstructed Width of a Door Opening is the dimension from the edge of the door leaf (when open at an angle of 90°) to the nearest edge of the door frame.]
This FireOx International Page on the SDI Corporate WebSite provides more guidance … http://www.sustainable-design.ie/fire/appendixd.htm
5. With regard to Recommendation 20 below, and NIST’s reference to allowing “all occupants an equal opportunity for evacuation” … this is not just a ‘nice idea’, or an ‘idealistic notion’ … this is now a Human and Social Right which is backed up and supported by International Law ! And … it is no longer acceptable for the Fire Science and Engineering Community to continue its stubborn resistance in the face of this fact !!
For the benefit of my fire engineering colleagues … I will, once again here, reproduce the most relevant extracts from the United Nations Convention on the Rights of Persons with Disabilities …
UN CRPD Preamble Paragraph (g)
Emphasizing the importance of mainstreaming disability issues as an integral part of relevant strategies of sustainable development, …
UN CRPD Article 9 – Accessibility
1. To enable persons with disabilities to live independently and participate fully in all aspects of life, States Parties shall take appropriate measures to ensure to persons with disabilities access, on an equal basis with others, to the physical environment, to transportation, to information and communications, including information and communications technologies and systems, and to other facilities and services open or provided to the public, both in urban and in rural areas. These measures, which shall include the identification and elimination of obstacles and barriers to accessibility, shall apply to, inter alia:
(a) Buildings, roads, transportation and other indoor and outdoor facilities, including schools, housing, medical facilities and workplaces ;
(b) Information, communications and other services, including electronic services and emergency services.
2. States Parties shall also take appropriate measures:
(a) To develop, promulgate and monitor the implementation of minimum standards and guidelines for the accessibility of facilities and services open or provided to the public ;
(b) To ensure that private entities that offer facilities and services which are open or provided to the public take into account all aspects of accessibility for persons with disabilities ;
(c) To provide training for stakeholders on accessibility issues facing persons with disabilities ;
(d) To provide in buildings and other facilities open to the public signage in Braille and in easy to read and understand forms ;
(e) To provide forms of live assistance and intermediaries, including guides, readers and professional sign language interpreters, to facilitate accessibility to buildings and other facilities open to the public ;
(f) To promote other appropriate forms of assistance and support to persons with disabilities to ensure their access to information ;
(g) To promote access for persons with disabilities to new information and communications technologies and systems, including the Internet ;
(h) To promote the design, development, production and distribution of accessible information and communications technologies and systems at an early stage, so that these technologies and systems become accessible at minimum cost.
UN CRPD Article 11 – Situations of Risk & Humanitarian Emergencies
States Parties shall take, in accordance with their obligations under international law, including international humanitarian law and international human rights law, all necessary measures to ensure the protection and safety of persons with disabilities in situations of risk, including situations of armed conflict, humanitarian emergencies and the occurrence of natural disasters.
[ Note: An outbreak of fire in a building is a situation of serious risk for all vulnerable building occupants/users.]
At the time of writing, 153 Countries had signed the UN CRPD … while 106 Countries have ratified the Convention and are, therefore, the ‘State Parties’ referred to above.
These are just a few of the State Parties to the UN CRPD …
- Argentina (ratified the UN CRPD, 2008-09-02)
- Australia (ratified the UN CRPD, 2008-07-17)
- Brazil (ratified the UN CRPD, 2008-08-01)
- Canada (ratified the UN CRPD, 2010-03-11)
- China (ratified the UN CRPD, 2008-08-01)
- Cuba (ratified the UN CRPD, 2007-09-06)
- European Union (ratified the UN CRPD, 2010-12-23)
- India (ratified the UN CRPD, 2007-10-01)
- Malaysia (ratified the UN CRPD, 2010-07-19)
- Mexico (ratified the UN CRPD, 2007-12-17)
- Philippines (ratified the UN CRPD, 2008-04-15)
- South Africa (ratified the UN CRPD, 2007-11-30)
- Turkey (ratified the UN CRPD, 2009-09-28)
- United Arab Emirates (ratified the UN CRPD, 2010-03-19)
I wonder how implementation is proceeding in these countries !?!
2005 NIST WTC RECOMMENDATIONS
GROUP 5. Improved Building Evacuation
Building evacuation should be improved to include system designs that facilitate safe and rapid egress, methods for ensuring clear and timely emergency communications to occupants, better occupant preparedness regarding their roles and duties for evacuation during emergencies, and incorporation of appropriate egress technologies.*
[ * F-36 This effort should include standards and guidelines for the development and evaluation of emergency evacuation plans, including best practices for both partial and full evacuation, and the development of contingency plans that account for expected conditions that may require adaptation, including the compromise of all or part of an egress path before or during evacuation, or conditions such as widespread power failure, earthquake, or security threat that restrict egress from the building. Evacuation planning should include the process from initial notification of the need to evacuate up to the point when occupants arrive at a place where their safety is ensured. These standards and guidelines should be suitable for assessing the adequacy of evacuation plans submitted for approval, and should require occupant training through the conduct of regular drills.]
NIST WTC Recommendation 16.
NIST recommends that public agencies, non-profit organizations concerned with building and fire safety, and building owners and managers develop and carry out public education and training campaigns, jointly and on a nationwide scale, to improve building occupants’ preparedness for evacuation in case of building emergencies. This effort should include better training and self-preparation of occupants, an effectively implemented system of floor wardens and building safety personnel, and needed improvements to standards. Occupant preparedness should include:
a. Improved training and drills for building occupants to ensure that they know evacuation procedures for a variety of emergency scenarios (e.g. including evacuation and shelter in place), are familiar with the egress route, and are sufficiently aware of what is necessary if evacuation is required with minimal notice (e.g. footwear consistent with the distance to be travelled, a flashlight/glow stick for pathway illumination, and dust masks).
b. Building owners and managers should educate tenants on the life safety systems present in their building(s), provide training materials explaining egress routes and stairwell and elevator information, and develop educational programmes explaining the most appropriate responses in emergency situations. It is further recommended that the owners and managers of office buildings implement the necessary systems for collecting and storing the training history of each building occupant.
c. Improved training and drills that routinely inform building occupants that roof rescue is not (or is) presently feasible as a standard evacuation option, that they should evacuate down the stairs in any full-building evacuation unless explicitly instructed otherwise by on-site incident commanders, and that elevators can be used if they are still in service and haven’t been recalled or stopped.
d. Improved codes, laws, and regulations that do not restrict or impede building occupants during evacuation drills from familiarizing themselves with the detailed layout of alternative egress routes for a full building evacuation.*
[ * F-37 New York City Local Law 5 prohibits requiring occupants to practice stairwell evacuation during drills.]
Affected Standard: ICC/ANSI A117-1. Model Building and Fire Codes: The standard should be adopted in model building and fire codes by mandatory reference to, or incorporation of, the latest edition of the standard. Affected Organizations: NFPA, NIBS, NCSBCS, BOMA, and CTBUH.
NIST WTC Recommendation 17.
NIST recommends that tall buildings be designed to accommodate timely full building evacuation of occupants when required in building-specific or large-scale emergencies such as widespread power outages, major earthquakes, tornadoes, hurricanes without sufficient advance warning, fires, explosions, and terrorist attack. Building size, population, function, and iconic status should be taken into account in designing the egress system. Stairwell capacity and stair discharge door opening width* should be adequate to accommodate contraflow due to emergency access by responders.
[ * F-38 Egress capacity should be based on an all-hazards approach that considers the number and width of stairs (and door openings) as well as the possible use of scissor stairs credited as a single stair.]
a. Improved egress analysis models, design methodology, and supporting data should be developed to achieve a target evacuation performance (e.g. time for full building evacuation*) for the design building population by considering the building and egress system designs, and human factors such as occupant size, mobility status, stairwell tenability conditions, visibility, and congestion.
[ * F-39 Use of egress models is required to estimate the egress capacity for a range of different evacuation strategies, including full building evacuation. NIST found that the average surviving occupant in the WTC towers descended stairwells at about half the slowest speed previously measured for non-emergency evacuations.]
b. To the degree possible, mobility impaired occupants should be provided a means for self-evacuation in the event of a building emergency. Current strategies (and law) generally require the mobility impaired to shelter in place. New procedures, which provide redundancy in the event that the floor warden system or co-worker assistance (i.e. a buddy system) fails, should consider full building evacuation, and may include use of fire-protected and structurally hardened elevators,* motorized evacuation technology (e.g. a battery-operated evacuation chair), and/or dedicated communication technologies for the mobility impaired.
[ * F-40 Elevators should be explicitly designed to provide protection against large, but conventional, building fires. Fire-protected elevators also should be structurally hardened to withstand the range of foreseeable building-specific or large-scale emergencies. While progress has been made in developing the requirements and technologies for fire-protected elevators, similar criteria and designs for structurally hardened elevators remain to be developed.]
c. If protected/hardened elevators are provided for emergency responders but become unusable during an emergency, due to a malfunction or a conventional threat whose magnitude exceeds the magnitude considered in design, sufficient stairwell capacity should be provided to ensure timely emergency responder access to buildings that are undergoing full evacuation. Such capacity could be provided either via dedicated stairways for fire service use or by building sufficient stairway capacity (i.e. number and width of stairways and/or use of scissor stairs credited as a single stair) to accommodate the evacuation of building occupants while allowing access to emergency responders with minimal hindrance from occupant contraflow.
d. The egress allowance in assembly use spaces should be limited in state and local laws and regulations to no more than a doubling of the stairway capacity for the provision of a horizontal exit on a floor, as is the case now in the national model codes.* The use of a horizontal exit creates an area of refuge with a 2 hour fire rated separation, at least one stair on each side, and sufficient space for the expected occupant load.
[ * F-41 The New York City Building Code permits a doubling of allowed stair capacity when one area of refuge is provided on a floor, and a tripling of stair capacity for two or more areas of refuge on a floor. In the world after 11 September 2001, it is difficult to predict: (1) if, and for how long, occupants will be willing to wait in a refuge area before entering an egress stairway; and (2) what the impact would be of such a large group of people moving down the stairs on the orderly evacuation of lower floors.]
Affected Standards: NFPA 101, ASME A 17. Model Building and Fire Codes: The standards should be adopted in model building and fire codes by mandatory reference to, or incorporation of, the latest edition of the standard.
NIST WTC Recommendation 18.
NIST recommends that egress systems be designed: (1) to maximize remoteness of egress components (i.e. stairs, elevators, exits) without negatively impacting on average travel distances; (2) to maintain their functional integrity and survivability under foreseeable building-specific or large-scale emergencies; and (3) with consistent layouts, standard signage, and guidance so that systems become intuitive and obvious to building occupants during evacuations.
a. Within a safety-based design hierarchy that should be developed, highest priority should be assigned to maintain the functional integrity, survivability, and remoteness of egress components and active fire protection systems (sprinklers, standpipes, associated water supply, fire alarms, and smoke management systems). The design hierarchy should consider the many systems (e.g. stairs, elevators, active fire protection, mechanical, electrical, plumbing, and structural) and system components, as well as functional integrity, tenant access, emergency responder access, building configuration, security, and structural design.
b. The design, functional integrity, and survivability of the egress and other life safety systems (e.g. stairwell and elevator shafts, and active fire protection systems) should be enhanced by considering accidental structural loads such as those induced by overpressures (e.g. gas explosions), impacts, or major hurricanes and earthquakes, in addition to fire separation requirements. In selected buildings, structural loads due to other risks such as those due to terrorism may need to be considered. While NIST does not believe that buildings should be designed for aircraft impact, as the last line of defence for life safety, the stairwells and elevator shafts individually, or the core if these egress components are contained within the core, should have adequate structural integrity to withstand accidental structural loads and anticipated risks.
c. Stairwell remoteness requirements should be met by a physical separation of the stairwells that provide a barrier to both fire and accidental structural loads. Maximizing stairwell remoteness, without negatively impacting on average travel distances, would allow a stairwell to maintain its structural integrity independent of any other stairwell that is subject to accidental loads, even if the stairwells are located within the same structural barrier such as the core. The current ‘walking path’ measurement allows stairwells to be physically next to each other, separated only by a fire barrier. Reducing the clustering of stairways that also contain standpipe water systems provides the fire service with increased options for formulating firefighting strategies. This should not preclude the use of scissor stairs* as a means of increasing stair capacity – provided the scissor stair is only credited as a single stair.
[ * F-42 Two separate stairways within the same enclosure and separated by a fire rated partition.]
d. Egress systems should have consistent layouts with standard signage and guidance so that the systems become intuitive and obvious to all building occupants, including visitors, during evacuations. Particular consideration should be given to unexpected deviations in the stairwells (e.g. floors with transfer hallways).
Affected Standard: NFPA 101. Model Building and Fire Codes: The standard should be adopted in model building and fire codes by mandatory reference to, or incorporation of, the latest edition of the standard.
NIST WTC Recommendation 19.
NIST recommends that building owners, managers, and emergency responders develop a joint plan and take steps to ensure that accurate emergency information is communicated in a timely manner to enhance the situational awareness of building occupants and emergency responders affected by an event. This should be accomplished through better co-ordination of information among different emergency responder groups, efficient sharing of that information among building occupants and emergency responders, more robust design of emergency public address systems, improved emergency responder communication systems, and use of the Emergency Broadcast System (now known as the Integrated Public Alert and Warning System) and Community Emergency Alert Networks.
a. Situational awareness of building occupants and emergency responders in the form of information and event knowledge should be improved through better co-ordination of such information among emergency responder groups (9-1-1 dispatch, fire department or police department dispatch, emergency management dispatch, site security, and appropriate federal agencies), efficient sharing and communication of information between building occupants and emergency responders, and improved emergency responder communication systems (i.e. including effective communication within steel and reinforced concrete buildings, capacity commensurate with the scale of operations, and interoperability among different communication systems.
b. The emergency communications systems in buildings should be designed with sufficient robustness and redundancy to continue providing public address announcements or instructions in foreseeable building-specific or large-scale emergencies, including widespread power outage, major earthquakes, tornadoes, hurricanes, fires, and accidental explosions. Consideration should be given to placement of building announcement speakers in stairways in addition to other standard locations.
c. The Integrated Public Alert and Warning System (IPAWS) should be activated and used, especially during large-scale emergencies, as a means to rapidly and widely communicate information to building occupants and emergency responders to enhance their situational awareness and assist with evacuation.
d. Local jurisdictions (cities and counties or boroughs) should seriously consider establishing a Community Emergency Alert Network (CEAN), within the framework of IPAWS, and make it available to the citizens and emergency responders of their jurisdictions to enhance situational awareness in emergencies.* The network should deliver important emergency alerts, information and real time updates to all electronic communication systems or devices registered with the CEAN. These devices may include e-mail accounts, cell/mobile phones, text pagers, satellite phones, and wireless PDA’s.
[ * F-43 Types of emergency communications could include life safety information, severe weather warnings, disaster notifications (including information on terrorist attacks), directions for self-protection, locations of nearest available shelters, precautionary evacuation information, identification of available evacuation routes, and accidents or obstructions associated with roadways and utilities.]
Affected Standard: NFPA 101, and/or a new standard. Model Building and Fire Codes: The standard should be adopted in model building and fire codes by mandatory reference to, or incorporation of, the latest edition of the standard to the extent it is within the scope of building and fire codes.
NIST WTC Recommendation 20.
NIST recommends that the full range of current and next generation evacuation technologies should be evaluated for future use, including protected/hardened elevators, exterior escape devices, and stairwell descent devices, which may allow all occupants an equal opportunity for evacuation and facilitate emergency response access. Affected Standards: NFPA 101, ASME A 17, ASTM E 06, ANSI A117.1. Model Building and Fire Codes: The standards should be adopted in model building and fire codes by mandatory reference to, or incorporation of, the latest edition of the standard.
2011-11-28: Further to my post, dated 20 October 2010 …
A valuable and essential facility in the grounds of Kanazawa Castle, Japan … entered directly from the exterior … is this Accessible Toilet Room / WC / Bathroom / Hygiene Room / Rest Room / Sanitary Room (whichever term you are familiar with) provided for public use. There is no attendant permanently present, and no camera surveillance of the external entrance area. However, it is regularly cleaned and properly maintained during the Castle’s opening hours.
The following photographs show a far more ‘developed’, ‘civilized’ and ‘person-centred’ approach to the design and fit-out of these public facilities (quite common in Japan) … than here in Europe.
Real Accessibility-for-All in action … with no messing around …
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: SOME PRELIMINARY COMMENTS …
1. Reliability has always been an issue with Active Fire Protection Systems … but, it is neither acknowledged, nor fully understood, that … Reliability Is Equally An Issue With Passive Fire Protection Measures !
Furthermore, the following should always be taken into account when considering the Safety Factors to be applied in calculating the level of satisfactory fire safety and protection which is provided in a specific project … one of the design objectives in Ethical Fire Engineering.
For example, if Category C below is indicative of the design and construction quality on a particular building site … just think of the Priory Hall Apartment Development in Dublin (!) … the Safety Factors to be applied in the design should be high … and with regard to actual construction, it should be expected that the Reliability of both Active Fire Protection Systems and Passive Fire Protection Measures will be initially low … with Life Cycle Reliability being entirely non-existent.
Quality of Fire Engineering Design & Related Construction
(a) Design of the works is exercised by an independent, appropriately qualified and experienced architect/engineer/fire engineer, with design competence relating to fire safety and protection in buildings … and, most importantly, that he/she interacts directly with the Project Design Professional in Responsible Charge ;
(b) Installation/fitting of related construction products/systems is exercised by appropriately qualified and experienced personnel, with construction competence relating to fire safety and protection in buildings ;
(c) Supervision of the works is exercised by appropriately qualified and experienced personnel from the principal construction organization ;
(d) Regular inspections, by appropriately qualified and experienced personnel familiar with the design, and independent of the construction organization(s), are carried out to verify that the works are being executed in accordance with the fire engineering design.
(a) Design of the works is exercised by an independent, appropriately qualified and experienced architect/engineer/fire engineer ;
(b) Installation/fitting of fire-related construction products/systems is exercised by appropriately qualified and experienced personnel ;
(c) Supervision of the works is exercised by appropriately qualified and experienced personnel from the principal construction organization.
This level of design and construction execution is assumed when the requirements for Category A or Category B are not met.
2. With regard to Recommendations 12 & 13 below … in an earlier post in this series, and elsewhere, I have defined Disproportionate Damage … and differentiated that structural concept from the related concept of Fire-Induced Progressive Collapse.
A significant number of countries include a requirement on Resistance to Disproportionate Damage in their national building codes. Often, it is only necessary to consider this requirement in the case of buildings having 5 Storeys, or more … a completely arbitrary height threshold. I would consider that adequately tying together the horizontal and vertical structural elements of a building … any building … is a fundamental principle of good structural engineering !!
Putting it simply … for the purpose of showing compliance with this structural requirement … it is necessary to demonstrate that a building will remain structurally stable if a portion of the building’s structure is removed … always remembering that every building comprises both structure and fabric, i.e. non-structure.
In reality this may happen, and quite often does happen, when, for example, a large truck runs into the side of a building, which can happen anywhere … or there is a gas explosion in some part of the building, which happened in Dublin’s Raglan House back in 1987, and many times in other countries … or a plane hits a high-rise building, which happened to Milan’s iconic Pirelli Tower in 2002, and to New York’s Empire State Building way back in 1945 … etc., etc. Raglan House collapsed … the Pirelli Tower and the Empire State Building did not.
[ The World Trade Center Towers were originally designed to absorb the impact of a large plane and to remain structurally stable afterwards ... in ambient conditions. However, what was not considered in the ambient structural design was 'fire', i.e. the fuel tanks were empty and no fire in the building would be initiated as a result of the mechanical damage caused by the plane impact ... which, on 11 September 2001, proved to be a ridiculous basis for any structural design ! This is why 9-11 should be regarded, at its core, as being a very serious 'real' fire incident.]
What I am leading up to is this … the concept of removing a portion of a building, and it remaining structurally stable afterwards … should now – logically and rationally – also be incorporated into the fire engineering design of Active Fire Protection Systems. In other words, if a portion of a building is removed, will any particular Active Fire Protection System continue to operate effectively in the rest of the building ? This has implications for the location and adequate protection of critical system components in a building … and for the necessary redundancy, zoning and back-up alternative routeing which must be designed into the system from the beginning !
2005 NIST WTC RECOMMENDATIONS
GROUP 4. Improved Active Fire Protection
Active fire protection systems (i.e. sprinklers, standpipes/hoses, fire alarms, and smoke management systems) should be enhanced through improvements to the design, performance, reliability, and redundancy of such systems.
NIST WTC Recommendation 12.
NIST recommends that the performance and possibly the redundancy of active fire protection systems (sprinklers, standpipes/hoses, fire alarms, and smoke management systems) in buildings be enhanced to accommodate the greater risks associated with increasing building height and population, increased use of open spaces, high-risk building activities, fire department response limits, transient fuel loads, and higher threat profile. The performance attributes should deal realistically with the system design basis, reliability of automatic/manual operations, redundancy, and reduction of vulnerabilities due to single point failures. Affected Standards: NFPA 13, NFPA 14, NFPA 20, NFPA 72, NFPA 90A, NFPA 92A, NFPA 92B, and NFPA 101. Model Building Codes: The performance standards should be adopted in model building codes by mandatory reference to, or incorporation of, the latest edition of the standard.
NIST WTC Recommendation 13.
NIST recommends that fire alarm and communications systems in buildings be developed to provide continuous, reliable, and accurate information on the status of life safety conditions at a level of detail sufficient to manage the evacuation process in building fire emergencies; all communication and control paths in buildings need to be designed and installed to have the same resistance to failure and increased survivability above that specified in present standards. This should include means to maintain communications with evacuating occupants that can both reassure them and redirect them if conditions change. Pre-installed fire warden telephone systems can serve a useful purpose and may be installed in buildings and, if so, they should be made available for use by emergency responders. All communication and control paths in buildings need to be designed and installed to have the same resistance to failure and increased survivability above that specified in present standards. Affected Standards: NFPA 1, NFPA 72, and NFPA 101. Model Building and Fire Codes: The performance standards should be adopted in model building and fire codes by mandatory reference to, or incorporation of, the latest edition of the standard.
NIST WTC Recommendation 14.
NIST recommends that control panels at fire/emergency command stations in buildings be adapted to accept and interpret a larger quantity of more reliable information from the active fire protection systems that provide tactical decision aids to fire ground commanders, including water flow rates from pressure and flow measurement devices, and that standards for their performance be developed. Affected Standards: NFPA 1, NFPA 72, and NFPA 101. Model Building and Fire Codes: The performance standards should be adopted in model building and fire codes by mandatory reference to, or incorporation of, the latest edition of the standard.
NIST WTC Recommendation 15.
NIST recommends that systems be developed and implemented for: (1) real time off-site secure transmission of valuable information from fire alarm and other monitored building systems for use by emergency responders, at any location, to enhance situational awareness and response decisions, and maintain safe and efficient operation;* and (2) preservation of that information either off-site, or in a black box that will survive a fire or other building failure, for purposes of subsequent investigations and analysis. Standards for the performance of such systems should be developed, and their use should be required. Affected Standards: NFPA 1, NFPA 72, and NFPA 101. Model Building and Fire Codes: The performance standards should be adopted in model building and fire codes by mandatory reference to, or incorporation of, the latest edition of the standard.
[ * F-35 The alarm systems in the WTC towers were only capable of determining and displaying: (a) areas that had at some time reached alarm point conditions; and (b) areas that had not. The quality and reliability of information available to emergency responders at the Fire Command Station was not sufficient to understand the fire conditions. The only information transmitted outside the buildings was the fact that the buildings had gone into alarm. Further, the fire alarm system in WTC Building 7, which was transmitted to a monitoring service, was on 'test mode' during the morning of 11 September 2001, because routine maintenance was being performed. Under test mode conditions: (1) the system is typically disabled for the entire building, not just for the area where work is being performed; and (2) alarm signals typically do not show up on an operator console.]
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: SOME PRELIMINARY COMMENTS …
1. The first of two NIST Publications being referenced in this Series of Posts is as follows …
NIST (National Institute of Standards and Technology). September 2005. Federal Building and Fire Safety Investigation of the World Trade Center Disaster: Final Report on the Collapse of the World Trade Center Towers. NIST NCSTAR 1. Gaithersburg, MD, USA.
The 2005 NIST Report concludes, in Chapter 9, with a list of 30 Recommendations for Action, grouped together under the following 8 Subject Headings …
i) Increased structural integrity ;
ii) Enhanced fire endurance of structures ;
iii) New methods for fire resisting design of structures ;
iv) Enhanced active fire protection ;
v) Improved building evacuation ;
vi) Improved emergency response ;
vii) Improved procedures and practices ; and
viii) Education and training.
NIST has clearly stated that “the numerical ordering (of the Recommendations) does not reflect any priority”.
From my point of view, the 2005 NIST Report is especially noteworthy for the emphasis placed on:
(a) The 3 R’s … Reality – Reliability – Redundancy ;
(b) Evacuation Way Finding … should be ‘intuitive and obvious’ … a major challenge for building designers, since buildings are still typically designed for ‘access’ only. In order to find the evacuation routes in a building, it is usually necessary to have a compass, a map, a magnifying glass, a torch … and a prayer book !!! More about this in later posts …
2. However, following on from NIST’s emphasis on Reality … and just between you, me and the World Wide Web … there is a lot of misunderstanding in the International Fire Science and Engineering Community about what exactly is the Realistic End Condition. But, here it goes …
Realistic End Condition: A ‘real’ fire in a ‘real’ building, which is used by ‘real’ people with varying abilities in relation to self-protection, independent evacuation to a ‘place of safety’, and participation in the Fire Defence Plan for the building.
It is strange, therefore … and quite unacceptable … to have to point out that the Realistic End Condition IS NOT … a test fire or an experimental fire in a laboratory … or a design fire in a computer model, even IF it is properly validated !
3. With regard to Recommendation 8 below … NIST’s contention that “Current methods for determining the fire resistance of structural assemblies do not explicitly specify a performance objective” is not strictly the case.
If we examine Technical Guidance Document B (Ireland) and Approved Document B (England & Wales) once again, as examples close to home … Part B: ‘Fire Safety’ in both jurisdictions should be read in conjunction with its associated Part A: ‘Structure’, which contains a requirement on Disproportionate Damage.
In everyday practice, however, this never happens. Instead, people dealing with Part B in both jurisdictions enter a sort of bubble … a twilight zone … and, if there is anything to do with structural performance in fire, they immediately refer to the Appendices at the back of both Guidance Documents (ignoring Part A altogether) … where we find a ‘single element’ approach to design, no consideration of connections, etc., etc., etc.
And … this fundamental error is further reinforced in Ireland because, under the national system of Fire Safety Certification for buildings, it is only Part B which is relevant.
At European Level, I would make the same point … under EU Regulation 305/2011 on Construction Products … Basic Requirement for Construction Works 2: ‘Safety in Case of Fire’ must be read in conjunction with Basic Requirement 1: ‘Mechanical Resistance & Stability’ … where we will again find a direct reference to Disproportionate Damage … and an indirect, but explicit, reference to Serviceability Limit States under normal conditions of use … including fire !
A major gap … the missing link at international level … is the failure, still, to elaborate and flesh out the structural concept of Fire-Induced Progressive Collapse. More about this in later posts …
4. With regard to Recommendation 10 below … and amplifying my earlier comments concerning Recommendation 6 … the manufacturers of all Lightweight Structural Fire Protection Systems … not just the Sprayed Systems … have a lot to answer for.
Major question marks concerning Life Cycle Durability, and Resistance to Mechanical Damage at any stage in a building’s life cycle, hang over all of these systems.
Fire testing, alone, does not show that a Lightweight Structural Fire Protection System is ‘fit for its intended use’ ! And manufacturers well know this !!!
And as for the Installation of Lightweight Structural Fire Protection Systems on site … it’s a hornets’ nest that nobody wants to touch !
Vested interests … vested interests … vested interests !!!
2005 NIST WTC RECOMMENDATIONS
GROUP 3. New Methods for Fire Resisting Design of Structures
The procedures and practices used in the fire resisting design of structures should be enhanced by requiring an objective that uncontrolled fires result in burnout without partial or global (total) collapse. Performance-based methods are an alternative to prescriptive design methods. This effort should include the development and evaluation of new fire resisting coating materials and technologies, and evaluation of the fire performance of conventional and high-performance structural materials.
NIST WTC Recommendation 8.
NIST recommends that the fire resistance of structures be enhanced by requiring a performance objective that uncontrolled building fires result in burnout without partial or global (total) collapse. Such a provision should recognize that sprinklers could be compromised, non-operational, or non-existent. Current methods for determining the fire resistance of structural assemblies do not explicitly specify a performance objective. The rating resulting from current test methods indicates that the assembly (component or sub-system) continued to support its superimposed load (simulating a maximum load condition) during the test exposure without collapse. Model Building Codes: This Recommendation should be included in the national model building codes as an objective, and adopted as an integral pert of the fire resistance design for structures. The issue of non-operational sprinklers could be addressed using the existing concept of Design Scenario 8 of NFPA 5000, where such compromise is assumed and the result is required to be acceptable to the Authority Having Jurisdiction (AHJ). Affected Standards: ASCE-7, AISC Specifications, ACI 318, and ASCE/SFPE 29.
NIST WTC Recommendation 9.
NIST recommends the development of: (1) performance-based standards and code provisions, as an alternative to current prescriptive design methods, to enable the design and retrofit of structures to resist real building fire conditions, including their ability to achieve the performance objective of burnout without structural or local fire collapse; and (2) the tools, guidelines, and test methods necessary to evaluate the fire performance of the structure as a whole system. Standards development organizations, including the American Institute of Steel Construction, have already begun developing performance-based provisions to consider the effects of fire in structural design.
This performance-based capability should include the development of, but not be limited to:
a. Standard methodology, supported by performance criteria, analytical design tools, and practical design guidance; related building standards and codes for fire resistance design and retrofit of structures, working through the consensus process for nationwide adoption; comprehensive design rules and guidelines; methodology for evaluating thermo-structural performance of structures; and computational models and analysis procedures for use in routine design practice.
b. Standard methodology for specifying multi-compartment, multi-floor fire scenarios for use in the design and analysis of structures to resist fires, accounting for building-specific conditions such as geometry, compartmentation, fuel load (e.g. building contents and any flammable fuels such as oil and gas), fire spread, and ventilation; and methodology for rating the fire resistance of structural systems and barriers under realistic design-basis fire scenarios.
c. Publicly available computational software to predict the effects of fires in buildings – developed, validated, and maintained through a national effort – for use in the design of fire protection systems and the analysis of building response to fires. Improvements should include the fire behaviour and contribution of real combustibles; the performance of openings, including door openings and window breakage, that controls the amount of oxygen available to support the growth and spread of fires and whether the fire is fuel-controlled or ventilation-controlled; the floor-to-floor flame spread; the temperature rise in both insulated and un-insulated structural members and fire barriers; and the structural response of components, sub-systems, and the total building system due to the fire.
d. Temperature-dependent thermal and mechanical property data for conventional and innovative construction materials.
e. New test methods, together with associated conformance assessment criteria, to support the performance-based methods for fire resistance design and retrofit of structures. The performance objective of burnout without collapse will require the development of standard fire exposures that differ from those currently used.
Affected National and International Standards: ASCE-7, AISC Specifications, ACI 318, and ASCE/SFPE 29 for fire resistance design and retrofit of structures; NFPA, SFPE, ASCE, and ISO TC92 SC4 for building-specific multi-compartment, multi-floor design basis fire scenarios; and ASTM, NFPA, UL, and ISO for new test methods. Model Building Codes: The performance standards should be adopted as an alternative method in model building codes by mandatory reference to, or incorporation of, the latest edition of the standard.
NIST WTC Recommendation 10.
NIST recommends the development and evaluation of new fire resisting coating materials, systems, and technologies with significantly enhanced performance and durability to provide protection following major events. This could include, for example, technologies with improved adhesion, double-layered materials, intumescent coatings, and more energy absorbing SFRM’s.* Consideration should be given to pre-treatment of structural steel members with some type of mill-applied fire protection to minimize the uncertainties associated with field application and in-use damage. If such an approach were feasible, only connections and any fire protection damaged during construction and fit-out would need to be field-treated. Affected Standards: Technical barriers, if any, to the introduction of new structural fire resisting materials, systems and technologies should be identified and eliminated in the AIA MasterSpec, AWCI Standard 12 and ASTM standards for field inspection, conformance criteria, and test methods. Model Building Codes: Technical barriers, if any, to the introduction of new structural fire resisting materials, systems, and technologies should be eliminated from the model building codes.
[ * F-34 Other possibilities include encapsulation of SFRM by highly elastic energy absorbing membranes or commodity grade carbon fibre or other wraps. The membrane would remain intact under shock, vibration, and impact but may be compromised in a fire, yet allowing the SFRM to perform its thermal insulation function. The carbon wrap would remain intact under shock, vibration, and impact, and possibly under fire conditions as well.]
NIST WTC Recommendation 11.
NIST recommends that the performance and suitability of advanced structural steels, reinforced and pre-stressed concrete, and other high-performance material systems be evaluated for use under conditions expected in building fires. This evaluation should consider both presently available and new types of steels, concrete, and high-performance materials to establish the properties (e.g. yield and ultimate strength, modulus, creep behaviour, and failure) that are important for fire resistance, establish needed test protocols and acceptance criteria for such materials and systems, compare the performance of newer systems to conventional systems, and the cost-effectiveness of alternative approaches. Technical and standards barriers to the introduction and use of such advanced steels, concrete, and other high-performance material systems should be identified and eliminated, or at least minimized, if they are found to exist. Affected Standards: AISC Specifications and ACI 318. Technical barriers, if any, to the introduction of these advanced systems should be eliminated in ASTM E 119, NFPA 251, UL 263, ISO 834. Model Building Codes: Technical barriers, if any, to the introduction of these advanced systems should be eliminated from the model building codes.
2011-11-21: The International Labour Office (ILO), in Geneva, and the European Union’s Centre for the Development of Vocational Training (CEDEFOP) … have recently published a Joint Report: ‘Skills for Green Jobs – A Global View’ …
The vision is positive … its advice is practical … and the writers actually sound as if they know what they are talking about. And it is evident that the word ‘green’ is used, in this Report, as a simple means of communicating the far more complex concept of ‘sustainable human and social development’, with all of its many different aspects. Judge for yourself by reading the extract from the Executive Summary below.
This Report’s contents also complement, very neatly, what has been said here in many posts … concerning the institutional infrastructure necessary, in societies, to properly implement an effective response to policies of energy conservation and security, climate change and sustainable development.
WAYS FORWARD [ Pages xxiv to xxvi, Executive Summary, ILO - EU CEDEFOP Report: 'Skills for Green Jobs - A Global View' ]
It is important to remember that skills are not a poor servant of the economy, expected merely to react and adjust to any change. The availability of a suitably trained workforce capable of further learning inspires confidence that in turn encourages investment, technical innovation, economic diversification and job creation.
Policies Need to be Informed, Coherent and Co-Ordinated
When policies to green the economy and policies to develop skills are not well connected, skill bottlenecks will slow the green transformation, and potential new jobs will be lost. Strategic, leadership and management skills that enable policy-makers in governments, employers’ associations and trade unions to set the right incentives and create enabling conditions for cleaner production and services are an absolute priority.
Environmental awareness as an integral part of education and training at all levels, introduced as a core skill from early childhood education onwards, will eventually push consumer behaviour and preferences and the market itself.
Labour market information for anticipating and monitoring skill needs for green jobs is the critical starting point for effective policy cycles. This enables governments and businesses to anticipate changes in the labour market, identify the impact on skill requirements, incorporate changes into the system by revising training programmes and introducing new ones, and monitor the impact of training on the labour market.
The country studies that told the most successful stories prove the value of effective co-ordination among line ministries and social partners, achieved by creating task forces for human resource development for a greening economy, or by incorporating training and skills issues into a council for environmental development. It is important that the platform for this dialogue has decision-making authority, can establish clear commitments among all those partners involved and allocate human and financial resources to them, and has agreed responsibilities not only for planning but for implementation. A win–win situation can only be achieved if environment, jobs and skills are discussed, planned and implemented in conjunction with each other.
Decentralized approaches can actually promote policy co-ordination and coherence at sectoral and local levels. Direct dialogue between national and regional governments and social partners can be translated into action when commitments and resource allocation occur at a smaller scale and where immediate dividends are obvious for all partners involved. A good combination of top-down co-ordinated policy-making with bottom-up sectoral or local initiatives can support effective training-intensive green transitions.
Policies Need to be Targeted
The transformation to greener economies provides an opportunity to reduce social inequalities. Social justice dictates that training initiatives target those who lose jobs during the transition, especially those who are typically at a disadvantage in the labour market and may require special assistance. The growth dividend from greening the economy will be attained only if access to new training provided as part of green measures is made accessible to disadvantaged youth, persons with disabilities, rural communities and other vulnerable groups. Incentives to increase women’s participation in technical training programmes will not only increase their participation in technology-driven occupations but also help solve the skill shortage problem in this segment of the labour market.
Green Transitions Affect the Entire Training System
Taking into account all three types of skills change – that resulting from employment shifts within and across sectors as the consequence of green restructuring, that associated with new and emerging occupations, and the massive change in the content of established occupations – it becomes clear that the whole training system must be mobilized. Adjusting training programmes to green changes in the labour market is a transversal task across levels and types of education and training.
So far, compulsory level and tertiary education have been catching up rather well, whereas technical and vocational education and training has been lagging behind in adapting to the needs of the green economy. Improving adjustment here can give new impetus to employment-centred and fair green transitions and requires the following key challenges to be met:
- Putting basic skills high on the policy agenda, as a foundation of flexibility and employability throughout the life cycle ;
- Matching classroom and practical training through apprenticeships, internships, job placements, projects on the job etc ;
- Adjusting the length and breadth of training provision according to different types of skills change ;
- Equipping teachers and trainers with up-to-date knowledge on environmental issues and on green technologies – education and training which deals with preparation of teachers and trainers should be one of the first priorities in skills response strategies ;
- Enabling active labour market policy measures (ALMP’s) to take into account green structural change and to provide access to relevant training and other employment activation measures ; and
- Deploying public employment services (PES), as important players in job matching and training, to raise awareness about green business opportunities and related skill needs.
The linchpin of effective skills development for greening the economy is co-ordination. The degree of co ordination between public and private stakeholders and the degree of involvement of social partners are decisive. Concerted measures need to be undertaken by governments at different levels, including the community level, employers and workers, through institutional mechanisms of social dialogue, such as national or regional tripartite councils, sector or industry skills councils, public–private partnerships and the like.
Developing Countries Need Special Measures
Developing countries, and the workers and employers in them, have the least responsibility for climate change and environmental degradation but suffer their economic and social consequences disproportionately. Special measures that can speed their employment-centred green transformations include:
- capacity building for employers in the informal economy and micro- and small enterprises to enter green markets in localities where they are most needed ;
- entrepreneurship training and business coaching for young people and adults to start up green businesses in conjunction with micro-finance projects ;
- environmental awareness among decision-makers, business leaders and administrators as well as institutions of formal and non-formal training systems ;
- capacity building of tripartite constituents to strengthen social dialogue mechanisms and to apply these to dialogue about accessibility of training for green jobs ; and
- increased capacity of formal education and training systems and institutions to provide basic skills for all and to raise the skills base of the national workforce ; this includes improving apprenticeship systems and building synergies with NGO’s that provide education and training.
These measures can only be taken if resources are available. It is therefore recommended that not only national governments but also international partnerships in developing countries take these recommendations into account both in environment programmes and in skills development programmes.
‘GREENING’ IRELAND’s ECONOMY ?
Ireland was not one of the countries examined in the ILO / EU CEDEFOP Project. That should tell us a lot !
BUT … just pause for a moment … and meditate on the many skill-related issues arising from the debacle at the Priory Hall Apartment Development, in Dublin.
AND NOW … read the following extracts from recent Irish National Reports … ‘high notions’ from goats in the Kerry Mountains …
The Overarching Vision – Forfás Report: ‘Future Skills Needs of Enterprise within the Green Economy in Ireland’ (November 2010) …
” For Ireland to be the benchmark ‘smart green’ economy for population centres under 20 million by 2015 – and to have the skills base and talent to drive innovative and high value products and services and maximise future business and employment growth potential.”
Final Paragraphs, #7 Conclusions – Review of National Climate Policy (November 2011) …
” In the wider-international context, there are also encouraging signs of a new ‘green growth’ paradigm which emphasises resource efficiency, the protection of natural resources and competitiveness along with the creation of new jobs. A long-term view of how Ireland aligns its economic development with the demands of the growth engines of global commerce should be at the core of a low-carbon development vision. In order to create enabling conditions for selling into these markets, many of which are already gearing up for the green economy, it will be necessary to ensure that the domestic conditions are right to encourage innovation. This can be done by showing environmental ambition and using tools that allow the market to identify solutions. That will require a combination of taking the best of what is working in other countries as well as devising domestically appropriate policies that will place Ireland in the vanguard of countries making the most of the opportunities presented by the green economy.
In terms of a long-term national vision of a carbon-constrained world, Ireland is faced with both the challenge of addressing a unique greenhouse gas emissions profile and the opportunity to position itself as an enlightened society with an environmentally sustainable and competitive, low-carbon economy. Developing the policies to put Ireland on a clear and definite path to achieve that vision is the immediate priority.”
Who Are These Moráns ?!? Will Somebody Please Get Real !?!
First Post in This Series …
2011-11-18: SOME PRELIMINARY COMMENTS …
1. Before launching into the next Group of NIST WTC Recommendations, it would be useful to distinguish between the following technical terms … which have been adapted from ISO/TR 10158: ‘Principles and Rationale Underlying Calculation Methods in Relation to Fire Resistance of Structural Elements’ …
Real Fire: A fire which develops in a building and which is influenced by such factors as the type of building and its occupancy; the combustible content (fire load); the ventilation, geometry and thermal properties of the fire compartment, or building space (should no fire compartmentation exist); the fire suppression systems in the building and the actions of the fire services.
Real Fires are complex phenomena. Consequently, in structural fire engineering, idealized versions of ‘real fires’ are employed.
Experimental Fire: A full or reduced scale fire with specified and controlled characteristics.
Design Fire: A fire with specified exposure data intended for use in connection with structural fire engineering calculations.
A Design Fire may either be representative of the thermal exposure described by the standard time-temperature-pressure relationship in an International/European/National Standard, or some non-standard exposure intended to simulate particular fire exposure conditions.
However, in SDI Technical Guidance Note 95/102: ‘Proper Evidence of a Fire Test Result within the European Economic Area (EEA)’, issued on 22 May 1995, I included the following caution …
#1.7 A Fire Test in a Fire Test Laboratory, involving exposure of a test specimen or prototype to ‘test fire’ conditions, gives only a limited indication of: (a) the likely performance of a particular product, material or component when exposed to ‘real fire’ conditions; and (b) the suitability of a product, material or component for a particular end use.
2. In conventional fire engineering, much confusion arises because of a failure to properly distinguish between these two concepts …
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.
The ability of a structural system to fulfil its design purpose, for a specified time, under the actual environmental conditions encountered in a building.
[ In structural fire engineering, the concern must be that the structure will fulfil its purpose, both during the fire - and for a minimum period afterwards, during the 'cooling phase'.]
3. Therefore, with regard to Recommendation 6 … it is more correct and precise to refer to ‘Steel Fire Protection Systems’, rather than to ‘steel fire resisting materials’ ! AND … the same questions must be asked about All Lightweight Steel Fire Protection Systems … not just the sprayed systems.
Lightweight Fire Protection Systems are also used to protect concrete in buildings and tunnels.
4. These 2005 NIST Recommendations will later be confirmed, and further reinforced, by the 2008 NIST Recommendations. Bringing Recommendation 7, below, closer to home … it is interesting to note that a very necessary discussion on the technical adequacy of the approach taken to structural performance in fire … in both Technical Guidance Document B (Ireland) and Approved Document B (England & Wales) … has yet not even commenced !
2005 NIST WTC RECOMMENDATIONS
GROUP 2. Enhanced Fire Endurance of Structures
The procedures and practices used to ensure the fire endurance of structures should be enhanced by improving the technical basis for construction classifications and fire resistance ratings, improving the technical basis for standard fire resistance testing methods, use of the ‘structural frame’ approach to fire resistance ratings, and developing in-service performance requirements and conformance criteria for sprayed fire resisting materials.
NIST WTC Recommendation 4.
NIST recommends evaluating, and where needed improving, the technical basis for determining appropriate construction classifications and fire rating requirements (especially for tall buildings) – and making related code changes now, as much as possible – by explicitly considering factors including: *
[ * F-23 The construction classification and fire rating requirements should be risk-consistent with respect to the design-basis hazards and the consequences of those hazards. The fire rating requirements, which were originally developed based on experience with buildings less than 20 storeys in height, have generally decreased over the past 80 years since historical fire data for buildings suggest considerable conservatism in those requirements. For tall buildings, the likely consequences of a given threat to an occupant on the upper floors are more severe than the consequences to an occupant on the first floor or the lower floors. For example, with non-functioning elevators, both of the time requirements are much greater for full building evacuation from upper floors and emergency responder access to those floors. It is not clear how the current height and areas tables in building codes consider the technical basis for the progressively increasing risk to an occupant on the upper floors of tall buildings that are much greater than 20 storeys in height.]
- timely access by emergency responders and full evacuation of occupants, or the time required for burnout without partial collapse ;
- the extent to which redundancy in active fire protection systems (sprinklers and standpipe, fire alarm, and smoke management) should be credited for occupant life safety ; *
[ * F-24 Occupant life safety, prevention of fire spread, and structural integrity are considered separate safety objectives.]
- the need for redundancy in fire protection systems that are critical to structural integrity ; *
[ * F-25 The passive fire protection system (including fire protection insulation, compartmentation, and fire stopping) and the active sprinkler system each provide redundancy for maintaining structural integrity in a building fire, should one of the systems fail to perform its intended function.]
- the ability of the structure and local floor systems to withstand a maximum credible fire scenario* without collapse, recognizing that sprinklers could be compromised, not operational, or non-existent ;
[ * F-26 A maximum credible fire scenario includes conditions that are severe, but reasonable to anticipate, conditions related to building construction, occupancy, fire loads, ignition sources, compartment geometry, fire control methods, etc., as well as adverse, but reasonable to anticipate operating conditions.]
- compartmentation requirements (e.g. 1,200 sq.m *) to protect the structure, including fire rated doorsets and automatic enclosures, and limiting air supply (e.g. thermally resisting window assemblies) to retard fire spread in buildings with large, open floor plans ;
[ * F-27 Or a more appropriate limit, which represents a reasonable area for active fire fighting operations.]
- the effect of spaces containing unusually large fuel concentrations for the expected occupancy of the building ; and
- the extent to which fire control systems, including suppression by automatic or manual means, should be credited as part of the prevention of fire spread.
Adoption of this Recommendation will allow building codes to distinguish the risks associated with different building heights, fuel concentrations, and fire protection systems. Research is needed to develop the data and evaluate alternative proposals for construction classifications and fire ratings. Model Building Codes: A comprehensive review of current construction classifications and fire rating requirements and the establishment of a uniform set of revised thresholds with a firm technical basis that considers the factors identified above should be undertaken.*
[ * F-28 The National Fire Protection Association (NFPA) 5000 model code and the International Building Code (IBC) both recognize the risks associated with different building heights and accepted changes in 2001 and 2004, respectively. Both model codes now require that buildings 126 metres and higher have a minimum 4 hour structural fire resistance rating. The previous requirement was 2 hours. The change provides increased fire resistance for the structural system leading to enhanced tenability of the structure and gives firefighters additional protection while fighting a fire. While NIST supports these changes as an interim step, NIST believes that it is essential to complete a comprehensive review that will establish a firm technical basis for construction classifications and fire rating requirements.]
NIST WTC Recommendation 5.
NIST recommends that the technical basis for the century-old standard for fire resistance testing of components, assemblies and systems be improved through a national effort. Necessary guidance also should be developed for extrapolating the results of tested assemblies to prototypical building systems. A key step in fulfilling this Recommendation is to establish a capability for studying and testing components, assemblies, and systems under realistic fire and load conditions.
This effort should address the technical issues listed below: *
[ * F-29 The technical issues were identified from the series of four fire resistance tests of the WTC Floor system, and the review and analysis of relevant documents that were conducted as part of this Investigation.]
a. Criteria and test methods for determining:
- structural limit states, including failure, and means for measurement ;
- effect of scale of test assembly versus prototype application, especially for long-span structures that significantly exceed the size of test furnaces ;
- effect of restraining thermal expansion (end-restraint conditions) on test results, especially for long-span structures that have greater flexibility ;
- fire resistance of structural connections, especially the fire protection required for a loaded connection to achieve a specified rating ; *
[ * F-30 There is a lack of test data on the fire resistance ratings of loaded connections. The fire resistance of structural connections is not rated in current practice. Also, standards and codes do not provide guidance on fire protection requirements for structural connections when the connected members have different fire resistance ratings.]
- effect of the combination of loading and exposure (time-temperature profile) required to adequately represent expected conditions ;
- the repeatability and reproducibility of test results (typically, results from a single test are used to determine the rating for a component or assembly) ; and
- realistic ratings for structural assemblies made with materials that have improved elevated temperature properties (strength, modulus, creep behaviour).
b. Improved procedures and guidance to analyze and evaluate existing data from fire resistance tests of building components and assemblies for use in qualifying an untested building element.
c. Relationships between prescriptive ratings and performance of the assembly in real fires.
Affected National and International Standards: * ASTM E 119, NFPA 251, UL 263, and ISO 834. Model Building Codes: The standards should be adopted in model building codes by mandatory reference to, or incorporation of, the latest edition of the standard.
[ * F-31 While the NIST Recommendations are focused mainly on U.S. national standards, each U.S. standard has counterpart international standards. In a recent report (ISO/TMB AGS N 46), the International Organization for Standardization (ISO), through its Advisory Group for Security (AGS), has recommended that since many of the ISO standards for the design of buildings date back to the 1980's, they should be reviewed and updated to make use of the studies done by NIST on the World Trade Center disaster, the applicability of new technology for rescue from high buildings, natural disasters, etc. ISO's Technical Advisory Group 8 co-ordinates standards work for buildings.]
NIST WTC Recommendation 6.
NIST recommends the development of criteria, test methods, and standards: (1) for the in-service performance of Sprayed Fire Resisting Materials (SFRM, also commonly referred to as fire protection insulation) used to protect structural components; and (2) to ensure that these materials, as installed, conform to conditions in tests used to establish the fire resistance rating of components, assemblies, and systems.
This should include:
- Improved criteria and testing methodologies for the performance and durability of SFRM (e.g. adhesion, cohesion, abrasion, and impact resistance) under in-service exposure conditions (e.g. temperature, humidity, vibration, impact, with/without primer paint on steel*) for use in acceptance and quality control. The current test method to measure the bond strength, for example, does not distinguish the cohesive strength from the tensile and shear adhesive strengths. Nor does it consider the effect of primer paint on the steel surface. Test requirements that explicitly consider the effects of abrasion, vibration, shock, and impact under normal service conditions are limited or do not exist. Also, the effects of elevated temperatures on thermal properties and bond strength are not considered in evaluating the performance and durability of SFRM.
[ * F-32 NIST tests show that the adhesive strength of SFRM on steel coated with primer paint was a third to half of the adhesive strength on steel that had not been coated with primer paint. The SFRM products used in the WTC towers were applied to steel components coated with primer paint.]
- Inspection procedures, including measurement techniques and practical conformance criteria, for SFRM in both the building codes and fire codes for use after installation, renovation, or modification of all mechanical and electrical systems and by fire inspectors over the life of the building. Existing standards of practice (AIA MasterSpec and AWCI Standard 12), often required by codes for some buildings need to be broadly applied to both new and existing buildings. These standards may require improvements to address the issues identified in this Recommendation.
- Criteria for determining the effective uniform SFRM thickness – thermally equivalent to the variable thickness of the product as it is actually applied – that can be used to ensure that the product in the field conforms to the near uniform thickness conditions in the tests used to establish the fire resistance rating of the component, assembly, or system. Such criteria are needed to ensure that the SFRM, as installed, will provide the intended performance.
- Methods for predicting the effectiveness of SFRM insulation as a function of its properties, the application characteristics, and the duration and intensity of the fire.
- Methods for predicting service life performance of SFRM under in-service conditions.
Affected Standards: AIA MasterSpec and AWCI Standard 12 for field inspection and conformance criteria; ASTM standards for SFRM performance criteria and test methods. Model Building Codes: The standards should be adopted in model building codes by mandatory reference to, or incorporation of, the latest edition of the standard. (See Recommendation 10 for more on this issue.)
NIST WTC Recommendation 7.
NIST recommends the adoption and use of the ‘structural frame’ approach to fire resistance ratings. This approach requires that structural members – such as girders, beams, trusses, and spandrels having direct connection to the columns, and bracing members designed to carry gravity loads – be fire protected to the same fire resistance rating as columns. This approach is currently required by the International Building Code (IBC), one of the model codes, and is in the process of adoption by NFPA 5000, the other model code. This requirement ensures consistency in the fire protection provided to all of the structural elements that contribute to overall structural stability.* State and local jurisdictions should adopt and enforce this requirement.
[ * F-33 Had this requirement been adopted by the 1968 New York City building code, the WTC floor system, including its connections, would have had the 3 hour rating required for the columns since the floors braced the columns.]
2011-11-15: The European Commission, in Brussels, recently published a New European Union Policy Document on Corporate Social Responsibility (CSR) … COM(2011) 681 final – Brussels, 2011-10-25.
To access this document … just go down to the EUR-Lex Link on the right hand side of this Page.
The Updated EU CSR Strategy for 2011-2014 signals an important change of direction … more a re-balancing of emphasis … which enterprises, of all sizes, should immediately be aware of … and whether or not these enterprises are located within Europe … or outside, as far away as China, India, Japan, South Africa, the USA or Brazil, etc.
The Updated CSR Strategy also confirms how the merging of the different and interrelated aspects of Sustainable Human & Social Development, i.e. social, economic, environmental, institutional, political and legal … is progressing nicely, and gathering some momentum. We have discussed this issue here many times … and promoted it elsewhere in our work, particularly during the last decade. How time flies !
[ In this last regard, reference should also be made to the United Nations Development Programme (UNDP) 2011 Human Development Report: 'Sustainability and Equity - A Better Future for All', which was launched in Copenhagen on 2 November 2011.]
A New Definition for Corporate Social Responsibility (CSR) …
The European Commission puts forward a new definition of CSR as ‘the responsibility of enterprises for their impacts on society’.
Respect for applicable legislation and for collective agreements between social partners are prerequisites for meeting that responsibility. To fully meet their corporate social responsibility, enterprises should have in place a process to integrate social - environmental - ethical - human rights and consumer concerns into their business operations and core strategy in close collaboration with their stakeholders, with the aim of:
- maximising the creation of shared value for their owners/shareholders, and for their other stakeholders and society at large ;
- identifying, preventing and mitigating their possible adverse impacts.
The complexity of that process will depend on factors such as the size of the enterprise and the nature of its operations. For most small and medium-sized enterprises, especially micro-enterprises, the CSR Process is likely to remain informal and intuitive.
To maximise the creation of shared value, enterprises are encouraged to adopt a long-term, strategic approach to CSR, and to explore the opportunities for developing innovative products, services and business models that contribute to Social Wellbeing and lead to higher quality and more productive jobs.
To identify, prevent and mitigate their possible adverse impacts, large enterprises, and enterprises at particular risk of having such impacts, are encouraged to carry out risk-based due diligence, including through their supply chains.
Certain types of enterprise, such as co-operatives, mutuals, and family-owned businesses, have ownership and governance structures that can be especially conducive to responsible business conduct.
The Updated EU CSR Strategy elaborates an Action Agenda for 2011-2014 …
1. Improving Company Disclosure of Social and Environmental Information: the new strategy confirms the European Commission’s intention to bring forward a new legislative proposal on this issue.
2. Enhancing Market Reward for CSR: this means leveraging EU Policies in the fields of consumption, investment and public procurement in order to promote market reward for responsible business conduct.
3. Enhancing the Visibility of CSR and Disseminating Good Practices: this includes the creation of a European award, and the establishment of sector-based platforms for enterprises and stakeholders to make commitments and jointly monitor progress.
4. Improving and Tracking Levels of Trust in Business: the European Commission will launch a public debate on the role and potential of enterprises, and organise surveys on citizen trust in business.
5. Better Aligning European and International Approaches to CSR: the European Commission highlights the following …
- OECD Guidelines for Multinational Enterprises ;
- 10 Principles of the UN Global Compact ;
- UN Guiding Principles on Business and Human Rights ;
- ILO Tri-Partite Declaration of Principles on Multinational Enterprises and Social Policy ;
- ISO 26000 Guidance Standard on Social Responsibility.
6. Further Integrating CSR into Education, Training and Research: the European Commission will provide further support for education and training in the field of CSR, and explore opportunities for funding more research.
7. Improving Self- and Co-Regulation Processes: the European Commission proposes to develop a short protocol to guide the development of future self- and co-regulation initiatives.
8. Emphasising the Importance of National and Sub-National CSR Policies: the European Commission invites EU Member States to present or update their own plans for the promotion of CSR by mid 2012.
European Commission COM(2011) 681 final – Brussels, 2011-10-25 (PDF File, 136 kb)
On Thursday evening, 1st December 2011, at 19.00 hrs … in the Dublin Institute of Technology … I will present an IABSE-Ireland Sponsored Lecture on the subject: ‘Sustainable Fire Engineering IS THE FUTURE !’.
This Presentation has been in continuous development across a snaking international path … Dubayy (UAE) in 2008 … Lund (Sweden) and Bengaluru (India) in 2009 … Dilli (India), Zurich (Switzerland) and Dublin (Ireland) in 2010 … Paris (France), the IFE’s International Fire Conference in Cardiff (Wales) and the ASFP-Ireland Fire Seminar in 2011 … and on 1 December next, in Dublin, I will be introducing some tough new realities for fire engineering generally … not just in Ireland …
IABSE Irish National Group Sponsored Lecture
Dublin Institute of Technology, Bolton Street – Michael O’Donnell Room (259)
Thursday, 1 December 2011 @ 19.00 hrs / 7.00 p.m.
CJ Walsh: Sustainable Fire Engineering IS THE FUTURE ! (Lecture Flyer, PDF File, 259 kb)
The aim of Sustainable Fire Engineering is to realize a safe and sustainable built environment.
Responding ethically, in built and/or wrought form, to the still evolving concept of sustainable human and social development … a principal objective of Sustainable Fire Engineering is to design for maximum credible fire and user scenarios … in order to maintain a proper and satisfactory level of fire safety and protection over the full life cycle of, for example, a building … and for a Sustainable Building, that life cycle is 100 years minimum.
Sustainable Fire Engineering must, therefore, be ‘reliability-based’ & ‘person-centred’.
This presentation will examine the authentic language and meaning of sustainability … and will then track how this impacts on the professional practice of fire engineering. Special mention will be made of Fire-Induced Progressive Collapse.
See you all there ! And I will be looking forward to a lot of challenging feedback on the night !!
2011-11-14: At the time of writing, this was the up-to-date position regarding the United Nations Convention on the Rights of Persons with Disabilities (CRPD) …
Convention … 153 Signatories … 106 Ratifications
Optional Protocol … 90 Signatories … 63 Ratifications
For reasons which can sometimes be complex … individuals and disability-related organizations are reluctant to make valid complaints … at local, regional or national levels in their countries.
This must stop ! If nobody complains … nothing will change !!
The following documents should now be used as a Proper Model for Making a Complaint … at any level. And should all domestic remedies be exhausted at national level in a State Party … you will have saved yourself a lot of time and energy, should you decide to take matters further … because the complaint will already be in the correct CRPD format …
Committee on the Rights of Persons with Disabilities – 15 June 2011
2011-11-07: Images from a recent business trip to the Region of Le Marche, in Italy … a region steeped in history, and rich in beautiful landscape, and good friends, food and wine … via Rome’s Ciampino Airport.
Without realizing it, the flight into Rome came just after a very serious storm had hit the north-west coastal Regions of Liguria & Toscana … even the central Region of Lazio received a lash. Devastatingly destructive flash floods had resulted. Many people were killed. The recent bad flooding in Dublin was just a tea party in comparison !
1. Anti-Sustainable ‘Photovoltaic Fields’
Not small greenhouses ! Instead, let me introduce you to the new concept of the Photovoltaic Field … where good agricultural land has been ‘planted’ with photovoltaic panels, incentivized by grants, tax breaks, or whatever (does it really matter ?!?) … how sustainable is this ? These fields are becoming quite a common sight in the Italian countryside …
2. Petrol/Gasoline Prices in Italy Now
This was a good average … depending on location, however, Petrol/Gasoline Prices could vary by as much as ± 3 to 4 cents …
3. Braille Maps at Building Entrances/Exits
A good example of a Braille Map, which should be located at the Entrances and Exits of All Buildings … essential for the blind - the visually impaired - those with frail sight … and very useful for travellers/visitors, generally, who are unfamiliar with their surroundings and need to rapidly access information about their location and orientation …
4. Corrado Levantesi – Montefortino, Le Marche
Finally and most importantly, I want to remember a good friend … Corrado Levantesi, who died one day after his 51st Birthday, on 15 September 2011, following a long illness. May he rest in peace …
SDI Practice Note: Due to administrative changes in the Provincial Boundaries of Le Marche … our Italian Address has been altered to …
Sustainable Design International Ltd., Via Doganelli 2, 63857 Amandola (FM), Italia.
- CJ Walsh on Recent Terenure Terraced Housing Fires – Party Wall Failures !!
- Saffron Willetts on Recent Terenure Terraced Housing Fires – Party Wall Failures !!
- MTC on Spectacular Dawn over Amandola (FM), in Italy – 28 April 2013 !
- Farrokh Rostami Kia on Health & Safety at a Construction Site in Osaka, Japan
- Brandi on ‘Sustainable Accessibility for All’ – An SDI Professional Service
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