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

  • Fire Engineering Design and Risk Assessment - Smoke Management System Components - Part 23

    In this Fire Engineering Design and Risk Assessment blog series for Architects and others involved in building design, we have been looking at fire and smoke ventilation. In the last blog, Part 22, we talked about the use of hot smoke tests in some parts of the world and how they can be carried out without damaging the premises in question.  In Part 23, we are going to look at the components of smoke management...

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  • Facilities Management & Fire Safety - Locating Sprinkler Heads - Part 13

    In this blog series for those who work in Facilities Management and who have an interest in or responsibility for fire safety, we have been looking at fixed fire-fighting systems. A sprinkler system design is usually as individual as the building which contains it. In part 13, we will look at how sprinkler heads should be located.In the vast majority of cases, if a sprinkler system is present in a building it should be...

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  • Facilities Management & Fire Safety - Sprinkler System Heads & Heat - Part 12

    In this blog series for those who work in Facilities Management and who have a responsibility for or interest in fire safety, we have been looking at how sprinklers operate in buildings and in Part 11, we began to look at sprinkler heads. In Part 12, we’re going to discuss the effect of temperature on the operation and design of sprinkler heads and how the choice of the most appropriate type of sprinkler head can...

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  • Fire Engineering Design and Risk Assessment - Hot Smoke Tests - Part 22

    In this blog series for Architects and others in the building design business, we have been looking at fire and smoke ventilation. In Part 21 of the series, we talked about the reliability and performance of a given design. In this blog we will give an overview of Hot Smoke Tests and how they are used.There is currently no requirement for hot smoke tests in the UK and although their use has been touched...

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  • Grenfell Tower fire

    LWF have received a number of enquiries from the media following this morning’s terrible fire at Grenfell Tower. There are a number of factors that may have contributed to the rapid fire spread witnessed in the early hours of this morning and potentially a number of combinations of these factors are possible. There is insufficient information available at this time from which to draw meaningful conclusions regarding the cause and development of this fire. Historically, major...

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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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