Lawrence Webster Forrest (LWF), Fire Engineering and Fire Risk Management Consultants
Lawrence Webster Forrest (LWF), Fire Engineering and Fire Risk Management Consultants



Navigation

Client login
Forgotten password
Follow us on Twitter Follow us on Facebook Subscribe to our blog

Freephone: 0800 410 1130
E-mail: fire@lwf.co.uk

Fire Safety for Healthcare Premises - Cavity Barriers - Part 42

Posted by LWF: 04/10/2018 13:17

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 41 of this series, we looked at the use of ventilation systems in healthcare venues and how this differs in a fire situation to most other types of building. In part 42, we will discuss cavity barriers and fire safety.

Fire and smoke can spread without interruption through concealed spaces or cavities in the construction of a building. Fire can travel to areas far remote from the seat of fire origin through concealed spaces, with the potential to cause a site-wide fire incident and so it is essential that fire-resistant barriers are put in place to restrict the size of any concealed spaces and a fire’s ability to spread through the space.

In healthcare venues, the requirements for subdivision due to hazard protection, sub-compartmentation and compartmentation are such that often additional subdivision of ceiling voids for cavity barriers is not necessary. There are exceptions, however, and one is where sub-compartment walls and walls to fire hazard rooms are constructed with 30-minute fire-resisting ceilings.

Regardless of the requirements for subdivision, it is a necessary requirement to prevent the interconnection of horizontal and vertical cavities. 

HTM 05-02: Firecode – Appendix E: Construction and fixing of cavity barriers (PDF) provides guidance on the construction and fixing of cavity barriers in healthcare venues and should be referred to at the building design stage.

30-minute fire-resisting barriers should be installed to provide a subdivision of concealed roof or ceiling voids. The result should be that an uninterrupted roof or ceiling void should not exceed 20 m. Where it is possible to do so, cavity barriers should be positioned to coincide with fire-resisting walls, in order to reinforce compartment boundaries. One exception to this is the ceiling void above operating departments.

30-minute fire-resisting cavity barriers should also be provided to prevent the interconnection of vertical and horizontal cavities, at each intersection of fire-resisting construction and elements containing a concealed space and within the void behind the external face of rain-screen cladding, at every floor level and on the line of compartment walls which abut the external wall.

In part 43 of this series, LWF will continue to discuss the use of cavity barriers in healthcare venues, before beginning to look at the use of sprinkler systems. In the meantime, if you have any questions about this blog, or wish to discuss your own project with one of our fire engineers, please contact us.

Lawrence Webster Forrest has been working with their clients for over 25 years to produce innovative and exciting building projects. If you would like further information on how LWF and fire strategies could assist you, please contact Peter Gyere on 020 8668 8663.

While care has been taken to ensure that information contained in LWF's publications is true and correct at the time of publication, changes in circumstances after the time of publication may impact on the accuracy of this information.

Leave a reply

  *

  *

 


CAPTCHA Image

[ Change the image ]


*Required

Subscribe to our fire safety blogs

Bulletins
Email Format
* indicates required

FIRE SAFETY BLOGS

  • Fire Engineering Design and Risk Assessment - External Access for the Fire Service - Part 42

    In LWF's Fire Engineering blogs for Architects and others in the building design business, we have been looking at the subject of firefighting. In part 41 of this series, we discussed where to fit landing valves in rising mains, taking into account travel distance for the firefighters to the place of fire origin. In part 42, we look at what external access to the premises for the Fire Service should be provided.In England and...

    Read more...

  • Fire Safety for Healthcare Premises - Fire Prevention & Waste Management - Part 76

    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 75, LWF discussed good housekeeping measures which should be implemented in a healthcare venue to avoid instances of fire. In part 76, we begin to discuss waste management from a fire prevention point of view. The effective management of waste on an ongoing basis is one of the...

    Read more...

  • Facilities Management & Fire Safety - Community Fire Safety - Part 2

    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 community fire safety. In part 1, it was established that while there was scarce regulation on fire safety standards in residential buildings, such dictates would have little effect on owner/occupier domiciles. Fire safety education, however, has proved more successful and the informal beginnings of this lay with the...

    Read more...

  • Fire Safety for Healthcare Premises - Fire Prevention - Part 75

    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 74, LWF discussed good housekeeping measures which should be implemented in a healthcare venue to avoid instances of fire. In part 75, we will continue from that point. Rubbish can accumulate in certain spaces which are out of the way and ignored, such as lift wells, behind radiators,...

    Read more...

  • Facilities Management & Fire Safety - Community Fire Safety - Part 1

    In LWF’s blog series for those who work in Facilities Management, or who have an interest in or responsibility for fire safety, our aim is to give information on best practice and fire engineering. In part 1 of this series, we will take a look at Community Fire Safety, a term which, while it relates in the main to domestic fire safety, can also be applied to business environments. Community Fire Safety (CFS) could be...

    Read more...

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...

Read more..

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...

Read more..

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..

Site map | Web development Croydon