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

Click on a bulletin to view details.

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 - 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...

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  • 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...

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  • 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...

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  • 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...

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  • 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...

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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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