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
Kenley
Surrey
CR8 5NH

Tel: +44 (0)20 8668 8663 Fax: +44 (0)20 8668 8583
E-mail: fire@lwf.co.uk

Technical Bulletins

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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 fire safety, specifies width of exit routes such that the time required for occupants to flow out of a prescriptively designed enclosure, containing a maximum design population is 150s (2.5 minutes).


Mechanical Smoke Ventilation Systems (MSVS)

Until recently, prescriptive documents such as Approved Document B (ADB) and British Standards gave guidance on smoke control systems primarily by natural means (i.e. external automatic opening vents (AOV’s) and natural smoke shafts) and pressure differential systems (namely pressurisation systems).


Mechanical Smoke Ventilation Systems (MSVS)

Until recently, prescriptive documents such as Approved Document B (ADB) and British Standards gave guidance on smoke control systems primarily by natural means (i.e. external automatic opening vents (AOV’s) and natural smoke shafts) and pressure differential systems (namely pressurisation systems).


Property and Business Continuity Protection in the UK

Building Regulations are intended to ensure that a reasonable standard of life safety is provided, in case of fire, and do not impose any requirements on the property and business continuity protection of a building.


Fire Safety in the Design, Management and Use of Residential Buildings - Code of Practice

The new code of practice for fire safety in the design, management and use of residential buildings BS9991 is published by BSI and came into effect on 31 December 2011.


Qualitative Design Review (QDR)

Qualitative Design Review or QDR is defined in PD 7974: 2001 as the initial stage of any engineering design in which the basic design parameters for a project are established and the scope and objectives of the fire strategy can be defined.


Water Mist Fire Protection in the UK

The use of water mist systems in the UK has increased over the last decade due to a number of reasons, the advantages being:


Fire Resistant Ductwork and Dampers

An important part of the infrastructure of a building is the ducting network that runs throughout the premises, it is often invisible, but is a key element to the environmental operations in a building.


The Building Regulations 2010

The requirements of Regulation 38 of the Building Regulations 2010 are those formerly covered under Regulation 16b and relate to the fire safety information to be provided by the person carrying out work.


Rising to the Residential Challenge

The recent market downturn has affected the housing industry with many developments being put on hold. As the market begins to recover and demand for homes starts to rise again many developers are reviewing residential schemes with a desire to develop more innovative residential layouts. This bulletin discusses some of the fire safety challenges of residential developments are described and how the application of performance based design can deliver economic, safe and creative residential layouts.


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FIRE SAFETY BLOGS

  • Facilities Management & Fire Safety - Gaseous Systems - Part 21

    In this blog series for those who work in Facilities Management and who have an interest in or responsibility for fire safety, LWF has been looking at the different types of fixed fire-fighting systems. Such systems are placed in a building, or specific areas of a building, and might appear largely dormant (aside from appropriate maintenance and testing) until a fire is detected. The most commonly used fixed fire-fighting system is probably a sprinkler system,...

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  • Fire Engineering Design and Risk Assessment - Fire Suppression & Sprinklers - Part 8

    In this Fire Engineering Design and Risk Assessment blog series for Architects and others in the building design business, LWF has been looking at the various advantages of sprinklers as part of a building’s fire protection arsenal.  In Part 7, we looked at the concessions that may be made in cases where sprinklers are present. In Part 8, we discuss how an understanding of the ways sprinklers can be used as per the prescriptive...

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  • Fire Engineering Design and Risk Assessment - Fire Suppression & Sprinklers - Part 7

    In this fire engineering design and risk assessment blog series for architects and others in the building design industry, we have been looking at fire suppression and sprinkler systems and how their use as part of a building’s fire protection plan affects the whole. In Part 6, we began looking at the potential benefits of sprinkler system installation on a design and will continue that theme in part 7. A suitable and fully-maintained sprinkler system...

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  • Facilities Management & Fire Safety - Foam Systems - Part 20

    In this blog series for those who work in Facilities Management and have a responsibility for or interest in Fire Safety, we have been looking recently at Water Mist Systems and how they first came into use for the protection of ships and their cargo many years ago, through to the present day expansion in their use to residential buildings and the resulting British Standards that were recently produced. In Part 20, we’re going to...

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  • Fire Engineering Design and Risk Assessment - Fire Suppression & Sprinklers - Part 6

    In this recent fire engineering design and risk assessment blog series for architects and others in the building industry, we have been looking at fire suppression particularly in relation to sprinkler systems. In part 5, we compared sprinklers to passive fire protection measures in terms of reliability when in use, as it has been argued that sprinklers are not 100% effective, which implies other measures are – they were not, of course.In part 6,...

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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...

Read more..

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