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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E-mail: fire@lwf.co.uk

Arc27 Smoke Control Strategies in Building Design - Part 2

Right click to download this fileArc27.pdf
Fires have sufficient power to force smoke through the small gaps around doors into protected areas such as stairs and lobbies. But this movement of smoke can be controlled by mechanically altering the forces that cause it. The principles of this method are: * airflow can control smoke movement if its average velocity is high enough * a pressure difference across a barrier can control the movement of smoke These principles are linked, but in engineering terms it is easier to consider them separately. We use velocity in the case of large gaps (open doors) and pressure differences when looking at gaps around closed doors.

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FIRE SAFETY BLOGS

  • Fire Safety for Healthcare Premises - Fire Safety Training for Staff - Part 84

    In LWFs blog series for healthcare professionals, our aim is to give information on best practice of fire safety in hospitals and other healthcare premises. In part 83, LWF began look at those roles in a healthcare environment which might have special responsibilities in case of a fire and while it is not possible to provide an exhaustive list which applies to all, those staff who will be expected to assist in patient evacuation were...

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  • Fire Safety for Facilities Management Personnel - Fire Safety Legislation - Part 2

    Lawrence Webster Forrest (LWF) is a specialist fire engineering and fire risk management consultancy whose aim is to give information on best practice in fire safety for facilities management personnel through this blog series. In part 1, we began an overview of the history of fire safety legislation, which we continue in part 2.In the last blog, it was ascertained that following a fire disaster, it is common to see changes in legislation with...

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  • Fire Engineering Design and Risk Assessment - Provision of Firefighting Shafts - Part 50

    In LWF’s Fire Engineering blog series for Architects and others in the building design business, we have been discussing firefighting and what provisions must be made for firefighting activities in a building. In part 49, we examined some of the criteria given in different guidance documents and in particular, how it is recommended that a firefighting lobby should be used as access to the accommodation from a firefighting lift or stair as a single fire...

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  • Fire Safety for Healthcare Premises - Fire Safety Training for Staff - Part 83

    In LWFs blog series for healthcare professionals, our aim is to give information on best practice of fire safety in hospitals and other healthcare premises. In part 82, LWF looked at what elements make up an effective fire safety training policy. In part 83, we begin by discussing the use of e-learning as a tool in fire safety training, before looking at training for staff with special responsibilities.E-learning, or learning which is undertaken on...

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  • Fire Safety for Facilities Management Personnel - Fire Safety Legislation - Part 1

    Lawrence Webster Forrest (LWF) is a specialist fire engineering and fire risk management consultancy whose aim is to give information on best practice of fire safety for facilities management personnel through this blog series. In part 1, we begin with an overview of the history of fire safety legislation.While it is true that most fire safety legislation is written with the aim of averting fires, it is also the case that much of it...

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Case Studies

Brentwood Town Hall Redevelopment
The redevelopment of Brentwood Town Hall included renovating the existing five storey property to provide police and council offices, a community hub and lettable office space across the basement, gro...

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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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