AHJ’s

Belmayne Timber Frame Construction – Cometh An Inferno ?

2013-07-11:  Further to the Posts about the ongoing Fire Safety Fiasco at Priory Hall in Dublin, beginning on 2011-10-18 … and my recent reply to Ms. Saffron Willetts, dated 2013-06-09, which can be found at the top right-hand corner of this Page …

A house with a timber-framed party wall, whether the wall projects above the roof covering or not … in a terrace, or semi-detached … and constructed in 2004 (approaching the height of the Celtic Tiger frenzy in Ireland) ??   Not even torture in Guantánamo Bay (Cuba) would persuade me to buy … or rent !

One last word of caution … carefully examine any ‘Opinion on Compliance’ covering this property.

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On Sunday evening last, 7 July 2013, I received an e-mail notification from Mr. Del Tillyer about a Belmayne ‘Fire Safety’ Press Conference to be held in his home … 19 Churchwell Place, Belmayne, Dublin 13 … on Tuesday, 9 July 2013, at 11.00 hrs.  I was pleased to attend.

Belmayne, Dublin 13 - Fire Hazard (1)

Photograph taken by CJ Walsh. 2013-07-09. Click to enlarge.

Back in ye good olde days of the Celtic Tiger … the price paid for this 2 Storey Timber-Framed Dwelling Unit was a staggering € 530,000 !   However, following occupation of their new home, it was noticed by the family that there were BIG problems concerning nuisance sound transmission from neighbouring units.  And that’s when their long shabby saga of ‘Fire Safety at Belmayne’ began … or, more correctly, it should be called the tortuous saga of a ‘Serious Lack of Fire Safety at Belmayne’ !!

Belmayne, Dublin 13 - Fire Hazard (2)

Photograph taken by CJ Walsh. 2013-07-09. Click to enlarge.

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In order to satisfy the Legal Requirements of Part D: ‘Materials and Workmanship’, Second Schedule to the Irish Building Regulations … this form of construction was covered by an Irish Agrément Board Certificate …

Front Page of IAB Certificate No.04/0198 (rev.2007) - Kingspan Century Medium Rise Timber Frame Construction SystemKingspan Century Medium Rise Timber Frame Construction System – IAB Certificate No.04/0198 (rev.2007)

Click the Link Above to read and/or download PDF File (1.43 MB)

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Unfortunately … any connection between IAB Certificate 04/0198 and the bitter, cold reality of how 19 Churchwell Place was actually constructed … is, at best, extremely tenuous … as the following photographs clearly show …

Belmayne, Dublin 13 - Fire Hazard (3)

Photograph taken by CJ Walsh. 2013-07-09. Click to enlarge.

Belmayne, Dublin 13 - Fire Hazard (4)

Photograph taken by CJ Walsh. 2013-07-09. Click to enlarge.

[ It was difficult … but I resisted the temptation to add an elaborate caption to each image which would describe the original Shoddy, Careless, Incompetent Site Workmanship !   And please bear in mind that the opening-up shown was limited … more problems cannot be seen, or will only become apparent in the future, e.g. the inevitable settlement of low-density thermal insulation !! ]

Belmayne, Dublin 13 - Fire Hazard (5)

Photograph taken by CJ Walsh. 2013-07-09. Click to enlarge.

Belmayne, Dublin 13 - Fire Hazard (6)

Photograph taken by CJ Walsh. 2013-07-09. Click to enlarge.

[ This is the other unreported and completely hidden Irish National Debt … over 20 years of ‘Lite’ National Regulation of the Construction Sector and an Entirely Inadequate and Ineffective National System of Local Authority Building Control / Independent Site Technical Control have resulted in a New National Building Stock which will require an enormous amount of difficult and costly repairs during the next decades … which will have to be paid for by the citizen !   Those responsible … National Authorities Having Jurisdiction (AHJ’s), Professional Institutes and Societies, Property Developers, Construction Product Manufacturers, and Politicians … have all quietly slipped away from the crime scene !! ]

Belmayne, Dublin 13 - Fire Hazard (7)

Photograph taken by CJ Walsh. 2013-07-09. Click to enlarge.

Belmayne, Dublin 13 - Fire Hazard (8)

Photograph taken by CJ Walsh. 2013-07-09. Click to enlarge.

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The Fire Consultant on this Project is Mr. Noel C. Manning.

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Explanatory Note:

In the event of a fire incident at this dwelling unit … why are the construction failures shown in the photographs above so risky, so hazardous, so dangerous for its occupants (more precisely – their health, safety and welfare) ??

Even within the Construction Sector, it is not well understood that the Fire Safety Objectives of Building Regulations, generally and not just in Ireland, are limited in scope to the protection of people who use and/or occupy buildings from fire (i.e. heat, smoke and flame).  These Fire Safety Objectives only ‘extend’ to the protection of property (i.e. the building fabric) … insofar as the protection of that property is relevant to the protection, including the safe evacuation, of people in the building.

The biggest original construction failure shown above is that there is an extensive warren of continuous, hidden cavities within the walls, floors, service duct and ceilings of the house … which facilitates the unseen spread of fire, including toxic smoke, very rapidly throughout the building and to adjoining dwelling units.  This type of insidious fire spread cannot be detected by smoke alarms located in the area of a staircase.

The serious ‘cavity’ failure is compounded by another serious construction failure … the weak and inadequate protection from fire (i.e. heat, smoke and flame) to the staircase itself … which is the only means of evacuation from the house for the occupants.

The limited Fire Safety Objectives of Building Regulations must be clearly distinguished from Project-Specific Fire Engineering Design Objectives which have a much wider scope.  For an elaboration of this issue … go to:  https://cjwalsh.ie/2012/12/sustainable-fire-engineering-for-all-sdis-professional-service/ 

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Urgent ! … Next Generation Architectural Design Concepts

2013-05-30:  Further to the recent post here, dated 2013-04-02 … and this Page on our Corporate WebSite …

Pausing … and stepping back … to consider conventional architectural practice, how architects are educated, and whether or not the professional institutes are helping, or handicapping, the forward progress of Architecture for a Better, More Sustainable World … I am deeply concerned about the future …

1.  Should it be ‘Multi-Disciplinary’ or ‘Trans-Disciplinary’ ?

The word ‘trans-disciplinary’ is confusing to a lot of people … surprisingly, to many at senior levels in construction-related industries, research sectors, and academia … not just in Ireland, but internationally.  The more senior the level, it seems the higher are the walls of that proverbial ‘box’.  But, let me reassure you, thinking outside the ‘box’ is not confined to people in their early 20’s !!

Looking over just the initial list of Consultant Specialists in a complex architectural project … it is the task of the Architect to transform a widely ‘multi-disciplinary’ input into a coherent ‘trans-disciplinary’ output.  These two concepts are very different.

Next Generation Architectural Processes and Procedures are urgently required …

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2.  EU Climate & Energy Policies – Key Driving Forces for Sustainability !

Recently, the European Commission issued this Green Paper … (which, by the way, has absolutely nothing to say about Climate Change Adaptation !) …

European Commission - COM(2013) 169 final Cover

Click to enlarge.

European Commission COM(2013) 169 final – Brussels, 2013-03-27

EU Green Paper – A 2030 Framework for Climate and Energy Policies

Click the Link Above to read and/or download PDF File (104 Kb)

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Concerning this Green Paper … Two Important Points …

(i)    Current European Union (EU) Climate and Energy Policies are not just a passing fad … they are here to stay.  With certainty, we also know that they will become more and more stringent … and that higher levels of performance will be mandated … not just on paper or a computer printout … but in reality, for example, in buildings which are constructed and actually occupied by ‘real’ building users.  Refer also to recent findings, in Europe, about the large and growing discrepancy between car fuel efficiencies claimed after testing in a laboratory, and when later monitored under ‘real’ driving conditions.

(ii)   It has now become obvious that the European Commission has lost the plot … big time !   Policies and Actions in closely related fields have been permitted to become fragmented, disjointed, and even counter-productive.  Written into the EU treaties is the term ‘sustainable development’ … an intricate, open, dynamic and continuously evolving concept.  However, senior levels (both political and bureaucratic) in the different Directorates-General of the European Commission have long ago forgotten, mislaid and/or lost the proper meaning of ‘sustainability’ … and the essential interdependency of its many aspects.

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… which brings me to the urgent necessity for Next Generation Architectural Design Concepts

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In Europe … the 1990’s and early 2000’s, taken together, was a period of construction experimentation and research.  We thought we could afford the resources and the lazy times … to try this, that and the other.  Little emphasis was placed on practical implementation in ‘real’ buildings.  However, the scale and immediacy of today’s Sustainable Development Challenges in the Built Environment have, within a few short years and much more quickly than expected, become unprecedented.

The Yanks (Gringos) are very strong on marketing … much stronger than Europe … so let’s examine a small model building … and see if its Architectural Design Concept is both coherent and comprehensive …

Mr. Amory Lovins, of the Rocky Mountain Institute in the USA ( www.rmi.org ) … has produced a very snazzy Visitor’s Guide to the sprawling complex that is ‘his home, bioshelter and office’ in Snowmass, Colorado … a Guide intended for wide public circulation.

Concerning this Building … Three Points of Interest(?) …

(i)    For a fleeting moment … let us imagine that a percentage – not even all – of the vast populations living in Africa, India and China wanted the same sort of lifestyle, including the house, that Amory Lovins possesses.  What would be the resource implications for this planet ??

RMI / Amory Lovins House, Colorado, USA - Exterior - Roof Photovoltaic (PV) Panels

Click to enlarge.

(ii)   In a first construction ‘try’ … separate solar and/or photovoltaic panels fixed in place on a roof … attached to the building, almost as an afterthought … were the norm.  Now, however, these building systems are no longer innovative … they must be properly shown to be ‘fit for their intended use’ (to comply with building regulations and codes) … and they should now be fully integrated into the architectural design concept for the building … which is not the case in the photograph above.  [ Car manufacturers face a similar design challenge today … how to successfully integrate new technologies, e.g. satellite navigation screens, smartphone docking stations, usb sockets, bluetooth, etc., etc., into the front dashboard.]

RMI / Amory Lovins House, Colorado, USA - Exterior - Tracking Photovoltaic (PV) Panel

Anyway … how reproducible is this model building in urban and suburban contexts … in the USA … or elsewhere in the world ??   How many people would have access to sufficient land outside a building to ‘plant’ one, or a series of photovoltaic panels ?   Tracking photovoltaic panels, as shown above ??   And as seen in Italy, with those ridiculous photovoltaic fields (in a post, dated 2011-11-07 ) … good agricultural lands should not be used for this purpose … not now, not ever, never !

RMI / Amory Lovins House, Colorado, USA - Interior - Building Services

Photograph taken by Judy Hill Lovins. Click to enlarge.

(iii)  Sustainable Buildings are ‘high-tech’ … and a very large amount and variety of electronic and mechanical equipment is necessary in order to reliably monitor and tightly control their performance … in other words, to operate a building in accordance with its design specification.  Again … these services should be fully integrated into the architectural design concept for what is, no longer, just a simple dwelling.  Do similar houses without basements, for example, now need a central well-ventilated service room, complete with compact workstation ?

RMI / Amory Lovins House, Colorado, USA - Interior - Battery Array

Photograph taken by Judy Hill Lovins. Click to enlarge.

In my opinion … the Architectural Design Concept for this building is not coherent.  The overall architectural impression is one of a large sprawling house, on a very large plot of land … with many different ‘environmental/energy’-related appendages, or add-ons.  Can you see any coherence ?

It is the task of the Architect to consider all facets of building performance at the earliest stages of design … whether a small building, or a very large complex building … and to integrate those many diverse, but interdependent, facets into a coherent architectural statement … having a conceptual single crystalline shape … while also bearing in mind ‘person-centredness’‘flexibility’, ‘adaptability’, ‘accessibility for all’, and a ‘long and useful life cycle’.

[ An aside … closer to home … we are now witnessing the rise of the ‘Passive House Designer’.  This person, who is able to use a specific computer software package … no less, and no more … need not necessarily be an architect, or have any architectural education/training.  Is it possible to refer to the realized output from this software as ‘architecture’ … or are they merely drab, boring boxes ?? ]

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3.  Sustainable Buildings, Fire Safety & Fire Engineering ?

In the elaborate Amory Lovins Visitor’s Guide above … there is only one mention of fire hazard in the building … and that is in relation to a Passive Clothes Dryer (Page 40).  End of story with regard to the Fire Safety Issues for its Users … and the Fire Engineering Implications arising from a chosen architectural design and chosen construction materials and methods.

When I was referring to a centrally located service room in # 2(iii) above … that room should also be structurally hardened, and fire and smoke ‘separated’ from other spaces in the house.  Or … if the service equipment is located in a roof space, there are implications for roof structural reliability in a fire situation, and the fire resistance of the ceiling construction beneath.  Or … if the equipment is located in a basement, a simple intermediate timber floor construction overhead is inadequate.

Furthermore … an intelligent fire detection and warning system … and a suitable domestic fire suppression system … are no longer luxuries or optional extras, but essential requirements !   Who would want to lose such a valuable investment ??

And insofar as fire safety issues are not being considered … it seems, at all … in the case of most ‘high-tech’, sustainable buildings … and certainly not in the case of the Lovins House … the Architectural Design Concepts for these buildings ‘suffer’ from a gaping hole … an enormous void … they are incomplete and, therefore, entirely inadequate.

Fire Engineering involves much, much more than mere compliance with building regulations and codes … whose fire safety objectives are limited, and whose performance requirements are sometimes inadequate and always minimal.

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Unfortunately … there is a fundamental conflict between Sustainable Building Design Strategies and the current state-of-the-art in Fire Engineering Design.  As an example … for cooling, heating and/or ventilation purposes in a sustainable building, it is necessary to take advantage of natural patterns of air movement in that building.  On the other hand, fire consultants in private practice, and fire prevention officers in Authorities Having Jurisdiction (AHJ’s), will demand that building spaces be strictly compartmented in order to limit the spread of fire and smoke … thereby dramatically interfering with those natural patterns of air movement.

In everyday practice, there is a vast chasm in understanding and communication between these two very different design disciplines.  As a result, serious compromises are being enforced on Sustainability Performance.  If, on the other hand, adequate independent technical control is absent on the site of a Sustainable Building … it is the fire safety and protection which is being seriously compromised.

A range of critical fire safety issues (fatal, in the case of firefighters) are also arising from the Innovative Building Products and Systems being installed in Sustainable Buildings.

And because the emphasis is on pre-construction design ‘intent’ rather than the ‘real’ performance of the completed and occupied building … all of these problems are being conveniently sidestepped or ignored … and they remain hidden from everybody’s view.

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Sustainable Fire Engineering Design, on the other hand, is the creative response to Sustainable Design … and the powerful drivers of Climate Change Adaptation, and Energy Conservation/Efficiency in Buildings.

Sustainable Fire Engineering Design Solutions are …

  • Adapted to Local Conditions … Geography, Climate (change, variability and severity swings), Social Need, Culture, and Economy, etc., etc ;
  • ‘Reliability-Based’ … the design process is based on competence, practical experience, and an examination of ‘real’ extreme events, e.g. 2001 WTC 9-11 & 2008 Mumbai Attacks, and 2011 Fukushima Nuclear Incident … rather than on theory alone ;
  • ‘Person-Centred’ … ‘real’ people are placed at the centre of creative endeavours and proper consideration is given to their responsible needs … and their health, safety and welfare … and security … in the Human Environment.

Sustainability continues to fundamentally transform our Fire Engineering, Architectural and Consultancy Practice at Sustainable Design International Ltd (SDI) !

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SDI Practice Announcement – New 32 Storey Hotel in China

2013-04-02:  Sustainable Design International Ltd. (SDI) is pleased to announce that its Managing Director, C.J. Walsh, has been invited to be ‘Project Design Architect’ / ‘Design Professional in Responsible Charge’ for a New 32 Storey Hotel in Yunnan Province, People’s Republic of China (PRC).

He will have responsibility for the Project’s Architectural Concept Design and General Schematic Design … including the overall architectural character and profile of primary exterior surfaces.

Project Approximate Value = € 65 Million (Euros) … excluding interior design, finishes and furnishing (which could end up doubling, or even tripling, the overall project value).

Sustainable Design International Ltd.  maintains a strict practice policy of Client Confidentiality.

[ If this Type of Professional Design Service Appeals to You, or Your Organization – Contact Us Immediately ! ]

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2012 ‘Understanding China’ Policy Briefing Friends of Europe & EuroChambres

An estimated One Billion People will be living in China’s cities by 2030.  This large-scale and very rapid urbanization demands that a sustainable transformation of their urban built, social, economic and institutional environments commences Today – not at some notional point in a far distant future.

Furthermore … replicating a European approach to sustainable design and construction in other regions of the world is doomed to failure.  Urban Transformation in China must be adapted to Local Geography, Climate, Climate Change, Social Needs, Cultures, Economy, and Local Severe Events (e.g. earthquakes, flooding).  With European support and collaboration … China must, and will, find its own way.

Greening China's Cities of Tomorrow (2012) - Report CoverGreening China’s Cities of Tomorrow (Spring 2012)

Click the Link Above to read and/or download a PDF File (4.42 Mb)

Report on a One-Day China Advisory Council Roundtable, co-organized by Friends of Europe and EuroChambres, which was held in Brussels on 8 March 2012.  This event was part of an ‘Understanding China’ Programme (mid-2009 to mid-2012), co-funded by the European Commission.

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2013 Asian Development Bank (ADB) Guidebook: ‘Increasing Climate Change Resilience of Urban Water Infrastructure’ 

This Guide describes a practical approach to bridge the gap between theoretical analyses of climate change impacts and the planning decisions that need to be made by city authorities and utility managers to increase climate change resilience of the water sector in the city of  Wuhan, Hubei Province, People’s Republic of China (PRC).  It focuses on answering the questions currently being asked by city planners and managers all over the world, as follows:

  • What changes might be caused by climate change ?
  • How will these changes affect services and utilities ?
  • What can we do now to prepare for them ?

The long lead time required to plan, finance, build, and commission city infrastructure facilities means that decision makers cannot wait for more detailed data on the effects of future climate change, especially those relating to local circumstances, but must make investment decisions based on what is known now and what can be readily predicted.  An important principle in this kind of ‘robust’ decision-making is provided by the  Intergovernmental Panel on Climate Change (IPCC)  tenet that adaptation investments, which move a city’s infrastructure toward sustainable development (such as providing safe drinking water and better sanitary conditions), are justifiable even without climate change.

This Guide is arranged in clear steps to provide direction and information for similar exercises in other areas.  Having grown out of a specific locality and its needs, the principles and solutions developed in this guide are founded on real world situations and problems …

ADB Guidebook: 'Increasing Climate Change Resilience of Urban Water Infrastructure' (2013) - Cover PageIncreasing Climate Change Resilience of Urban Water Infrastructure (ADB, 2013)

Click the Link Above to read and/or download a PDF File (2.31 Mb)

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***  THIS TALL BUILDING IN YUNNAN PROVINCE  &  SIMILAR COMPLEX ARCHITECTURAL PROJECTS  ***

Working within the professional constraints of ‘client confidentiality’ … it is possible to have a general discussion about current building design, construction and operation issues in an international sector which is operating, more and more, beyond national borders … without adequate, or very often any, national and local regulation.  By ‘regulation’, I mean a flexible system of building-related legislation which is operated in conjunction with mandatory and effective technical control.

In order to cope with today’s complex built environment and the enormous variation in the size and scale of construction projects … a ‘flexible’ mix of functional, performance and prescriptive legal requirements is the sharpest and most appropriate instrument.

And you can forget the hype about performance-based building codes coming out of the USA … hot air, and much ado about little !

Of course, the biggest issue of all is the competence of those individuals who work in Authorities Having Jurisdiction (AHJ’s), i.e. technical controllers.  Even in the most developed economies of the world … there are many occasions when the level of individual incompetence in an AHJ is astounding … and institutional arrangements within the AHJ itself are a mess, i.e. the AHJ is not fit for purpose.

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1.  Sustainable Design – Design Process Efficiency & Proper Preparation for Construction

A tremendous amount of waste is associated with and generated by the processes of conventional building design, construction and operation.  There is a more up-to-date and efficient way of doing things … an essential way for Sustainable Design … and it’s called Building Information Modelling (BIM) !

Furthermore … consider, for a moment, just the initial list of Specialist Consultants who will be engaged directly by the Chinese Client when the project’s conceptual design has reached a sufficiently developed stage.  How can all of these individuals and organizations – listed in the revised and agreed Project Design Agreement – obtain accurate and reliable ‘real time’ information about the rapidly evolving project from a central design library / information database … then feed their new work back into the centre without unnecessary delay ?   How, next, can everyone else who needs to know, be updated with the new design input … again, without delay ?   And perhaps, these consultants may also be based in different countries … working in very different time zones …

  • Building Information Modelling (BIM) Consultant
  • Local Design Institute (LDI) … a local architectural practice which will produce the project’s working drawings, handle local spatial planning and building code approvals, carry out site inspections, and deal directly with construction organization(s), etc., etc.
  • Interior Design Consultant
  • Traffic / Parking Analysis Consultant
  • Curtain Wall Consultant (Curtain Wall, Skylights & Special Roof Structures)
  • Retail Market Analysis Consultant
  • Landscape Design Consultant
  • Quantity Surveying & Cost Estimating Consultant
  • Furniture Design Consultant
  • Geotechnical, Civil Engineering & Structural Engineering Consultant (including structural performance under fire and earthquake conditions, resistance to fire-induced progressive damage and disproportionate damage … and also including climate resilience)
  • Acoustic & Audio-Visual Design Consultant
  • Mechanical, Electrical & Plumbing (MEP) Engineering Consultant
  • Integrated Building Automation & Management / Telecom / Security / Networking Consultant
  • Fire & Life-Safety Engineering Consultant
  • Water Feature Consultant
  • Wind Tunnel Test Consultant
  • Kitchen Equipment and Layout Design Consultant
  • Art, Artefact and Accessories Consultant & Procurement Services for Art, Artefacts, and Accessories
  • Tenant Storefront Design Consultant
  • Helicopter Landing Pad Design Consultant
  • Universal Design / Accessibility for All Consultant [including access to the building, electronic, information and communication technologies (EICT’s), and services offered at the hotel … and including fire safety, protection and evacuation for all]

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2.  The ‘Design Professional in Responsible Charge’ !

The Project Design Agreement requests that the Client receive advice on who might be the different Specialist Consultants listed above.  In addition, it will be necessary to demarcate the boundaries within which each Consultant will operate … and, where appropriate, to prescribe a design performance target (see below) for each speciality … which must be ‘realized’ in the completed and occupied building !

Recalling the many previous posts, here on this Technical Blog, concerning NIST’s 2005 & 2008 Recommendations on the 9-11 World Trade Centre Building Collapses in New York City‘somebody’ must ensure that the many individuals and organizations listed above – members of the Larger (2nd Stage) Design Team – use consistent design data and assumptions … must co-ordinate design documents and specifications to identify overlaps and eliminate gaps … must serve as ultimate liaison between the Client, the Local Design Institute, AHJ officials, and the Construction Organization(s) … and must ensure that everybody is on the same communication wavelength, and working towards the same objective in a trans-disciplinary manner.

That ‘Somebody’ … the Design Professional in Responsible Charge … must be the Project Design Architect !

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3.  Some Sustainable Design Performance Targets

Actual construction and building user performance shall be carefully (i.e. reliably and precisely) monitored … and independently verified …

A.   Basic Functional Requirements … the Building shall comply with the Basic Requirements for Construction Works – elaborated in Annex I of European Union (EU) Regulation No.305/2011 of the European Parliament and of the Council, of 9 March 2011, laying down Harmonized Conditions for the Marketing of Construction Products and Repealing Council Directive 89/106/EEC.

See my Post, dated 2011-09-13 … https://cjwalsh.ie/2011/09/new-eu-construction-product-regulation-3052011-halleluiah/

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B.   Good Indoor Air Quality (IAQ) … Two high-level performance indicators have been developed with the aim of protecting Human Health, and are both now referenced in International Standard ISO 21542: ‘Building Construction – Accessibility & Usability of the Built Environment’

      –   Radon Activity (incl. Rn-222, Rn-220, RnD) in a building should, on average, fall within the range of 10 Bq/m3 to 40 Bq/m3, but shall at no time exceed 60 Bq/m3 ;

      –   Carbon Dioxide (CO2) Concentrations in a building should not significantly exceed average external levels – typically within the range of 300 parts per million (ppm) to 500 ppm – and shall at no time exceed 800 ppm.

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C.   Energy Conservation & Efficiency + A ‘Positive Energy’ Return + Assured Building User Thermal Comfort

See my Post, dated 2013-09-10 … https://cjwalsh.ie/2013/09/passivhaus-standard-is-not-enough-in-new-building-projects/

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D.   Project-Specific Sustainable Fire Engineering Design Objectives

See my Post, dated 2014-04-20 … https://cjwalsh.ie/2014/04/sustainable-fire-engineering-design-targeting-mrv/

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