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 - Halocarbon Agents - Part 12

    In LWF’s fire engineering blog series for architects and others in the building design business, we have been looking at Fire Suppression and most recently, gaseous systems. In part 11, we looked at the effect of gases on the environment and in part 12, we’ll discuss halocarbon agents and inert agents before touching on water mist systems.Halocarbon agentsHalocarbon agents were developed as a viable alternative to halons after the substance was banned for...

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  • Fire Safety for Healthcare Premises - Thermoplastic Materials - Part 31

    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 30, we discussed the potential for internal fire spread and in part 31, we take a look at the use of thermoplastic materials in roof lights and lighting diffusers.In part 30, the national and European classifications for linings within spaces contained in healthcare buildings were detailed. The...

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  • Facilities Management & Fire Safety - Taking action upon finding a fire - Part 5

    In LWF’s 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 procedures; who they are written for and how they should be written.  Parts 3 and 4 of this series looked at summoning the fire service to a fire and in part 5, we look at what other action should be taken upon fire discovery.The issue of...

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  • Fire Safety for Healthcare Premises - Internal Fire Spread - Part 30

    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 29 of this series, we looked at plant areas and how they should be designed with safe evacuation in mind. In part 30, we discuss the potential for fire to spread through internal walls and how this...

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  • Fire Engineering Design and Risk Assessment - Agents used in Gaseous Systems - Part 11

    In LWF’s Fire Engineering and Risk Assessment blog series for architects and others in the building design business, we have been looking at gaseous systems as a method of fire suppression. In part 10 of this series, the required configuration of gaseous systems was outlined and in part 11, the agents used in such systems will be discussed from the point of view of safety and the environment.After the banning of halon 1301 for...

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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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