Lawrence Webster Forrest (LWF), Fire Engineering and Fire Risk Management Consultants
Lawrence Webster Forrest (LWF), Fire Engineering and Fire Risk Management Consultants


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Lawrence Webster Forrest
Legion House
Lower Road

Tel: +44 (0)20 8668 8663 Fax: +44 (0)20 8668 8583

Technical Bulletins

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BS9999:2008 - Code of practice for fire safety in the design, management and use of buildings

LWF PROFESSIONAL BULLETIN Introduction to the new Code of Practice for Fire Safety in the Design, Management, and Use of Buildings.

EB-15 Means of Escape Assessment - The Basics

LWF PROFESSIONAL BULLETIN How do I know people in my building can escape safely? How many people can I have at any one time in my premises? Where should I locate my fire exits? So many questions architects, designers and building managers cannot answer until a fire safety advisor / engineer is involved. The main objective of the Building Regulations, Approved Document B - Amended 2002 (ADB) - Fire Safety is Life Safety. This bulletin therefore concentrates on the various parameters that must be taken into account to ensure such a level of safety is achieved when designing or refurbishing means of escape in buildings.

EB-14 Fire Safety Engineering of Composite Steel-Framed Buildings

LWF PROFESSIONAL BULLETIN Fire Safety Engineering of Composite Steel-Framed Buildings. Since 1991 the requirements of the Building Regulations for England and Wales have been performance based rather than prescriptive.

EB-13 The role of the Fire Engineer

LWF PROFESSIONAL BULLETIN The Role of the Fire Engineer Fire engineering, in relative terms is a new discipline and is growing faster than ever before. The benefits that fire engineering can bring to projects is becoming increasingly understood and enjoyed by design teams and end clients.

EB-12 Fire Engineering Strategy

LWF PROFESSIONAL BULLETIN Fire Engineering Strategy - ‘What is its Purpose’ A fire strategy, in conjunction with scale drawings, should unambiguously detail the type of fire safety facilities that are to be incorporated within a building, along with their respective specifications. The method of operation of any system (i.e. cause and effect), whether active or passive, should also be clearly stated within the strategy. All buildings are different, although the individual types of buildings will fall into certain categories. The categories obviously vary but could include: industrial type buildings, which may lead to high-bay storage and abnormal fire loads or manufacturing/processing risks; healthcare or hospital establishments, leading to risks associated with human incapacitation and the implications associated with horizontal escape; or, office, shop, public or commercial premises, which may lead to risks associated with high population densities or building unfamiliarity.

EB-11 Approved document B - Proposed Revisions II

In July 2005 the Office of the Deputy Prime Minister (ODPM) issued a revision of the Approved Document B (ADB) for consultation. The amendment was considered necessary to adapt to the current standards and changes in construction practise, approaches to European terminology concerning fire rating and an integration of other technical references and associated legislation. As such the proposed new edition of ADB has been split into two parts - Volume 1 (Dwellings) and Volume 2 (Buildings other than Dwellings).

EB-10 Residential Sprinklers

A sprinkler system can be defined as a series of pipes and sprinkler heads that is intended to spray water over a fire with the objective of controlling and suppressing it. Residential sprinklers are a relatively new concept in the UK, although sprinkler systems in industrial and commercial premises have demonstrated their effectiveness and usefulness over a number of years. It is for this reason that they are now being considered for use in homes, and the Home Office and the fire service now recommend this technology for residential premises.

EB-9 Approved Document B - proposed revisions

There has been much speculation about the proposed changes to Approved Document B, since these were announced by the Government two years ago. December’s bulletin discusses the proposed revisions and the impact they will have on the design of buildings where people live (changes to buildings that are not dwellings will be covered in a future issue).

EB-8 Car Park Fires

According to Home Office statistics, there were 92,800 road vehicle fires in the UK during 2003. This is a 30 per cent rise since 1997, when there were 71,500 such fires. The increase is mainly due to arson.

EB-7 Fire safety and the disability discrimination act

The Disabled Discrimination Act (DDA - 1995) came into force on the 2nd of December 1996, and made requirements on employers and service providers relating to the provision of disabled access into and around buildings.

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  • Fire Engineering Design and Risk Assessment - Firefighting & The Fire Service - Part 18

    In LWF's Fire Engineering blog series for Architects and others involved in building design, we have been looking at firefighting. In part 17, we began to look at how firefighting is undertaken by the Fire Service and their objectives and modes of operation when arriving at a fire. In part 19, tactical firefighting is discussed.While the general objectives of tactical firefighting were given in the last blog, there are various methods used by firefighters...


  • Fire Safety for Healthcare Premises - Open-sided Car Parks - Part 52

    In LWFs blog series for healthcare professionals, the aim is to give information on best practice of fire safety in hospitals and other healthcare premises. In part 51 of this series, we were looking at the potential for fire spread from one area of a building to another through external surfaces, before moving on to begin to look at the necessary arrangements for car parks. In part 52, we continue on that theme by considering...


  • Facilities Management & Fire Safety - Calculating RSET - Part 9

    In LWFs blog series for those who work in Facilities Management or who have an interest in or responsibility for fire safety we have been looking at fire safety engineering. In part 8, we looked at how ASET (Available Safe Egress Time) is calculated and how this should always be more than the RSET (Required Safe Egress Time). While ASET involves a series of calculations relating to fire growth and the building itself, RSET, also...


  • Fire Engineering Design and Risk Assessment - Firefighting & The Fire Service - Part 17

    In LWF’s fire engineering blog series for Architects and others in the business of building design, we have been looking at firefighting. In part 16, we discussed first-aid firefighting by the occupancy and the use of hose reels to do so. In part 17, we will begin to look at firefighting from the point of view of the Fire Services.The particular objectives of the Fire Service in a given situation will be decided upon...


  • Fire Safety for Healthcare Premises - External Fire Spread - Part 51

    In LWF’s blog series for healthcare professionals, the aim is to give information on best practice of fire safety in hospitals and other healthcare premises. In part 50 of this series, we discussed the potential for external fire spread including calculating unprotected areas and consideration of the surfaces of external walls and roofs. In part 51, we continue looking at external fire spread, starting with junctions of different elements.At the junction of wall and...


Case Studies

The Wohl Neuroscience Institute - Fire Safety, Strategy & Engineering
Key Facts: Client: King’s Clinical Neuroscience Institute Project Manager: MACE Ltd Designers: Devereux Architects/Allies and Morrison Approximate Size: 7,400m2 Description of the Project:...

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General Bulletins

Fire - The External Risk
When we consider fire safety, our focus is normally from within, what can we do to prevent the occurrence of fire and how we can limit its damage.  Whilst this is the correct stance to take, we m...

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Technical Bulletins

Evacuation Modelling - Factor in Human Behaviour
Evacuation of buildings can be analyzed in different ways. Approved Document B (ADB) which provides guidance on meeting the requirements of the England and Wales Building Regulations with regard to fi...

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