Page 14 - food store model (with basement accomodation)

Reference Guide Fire Strategy

Pipes of aluminium alloy, fibre cement or UPVC with a maximum internal diameter of 160mm

may be sleeved with a non-combustible material for a distance of not less than 1,000mm
either side of the fire resisting element.

1.5.21 Fire and smoke dampers

Fire dampers are to be provided within any ductwork at the point which it penetrates a fire

separating element. All fire dampers and their frames should be tested to BS EN 1366-2 and
be classified to BS EN 13501-3. They should have an E classification equal to or greater

than the wall/floor through which they pass.

Fire dampers activated only by fusible links are not suitable for protecting escape routes. In
such instances an ES classified fire and smoke damper which is activated by a fire and

smoke detector shall be used. All other dampers should be fire rated E60.

In this instance ES 60 classified fire and smoke dampers activated by smoke detection are
required in all ductwork passing through a protected lobby and/or protected stair. It is

however noted services are not permitted to run through or be accessed from the fire fighting
stair.

Detailed requirements are specified in Section 6 of BS 9991, where the M& E consultant/
contractor is unsure of the requirements of the proposed fire and/or smoke dampers, it is
recommended a workshop is arranged with a qualified fire engineer to review the provisions.

It should be ensured that unobstructed access is provided to all dampers via an access
hatch located on the appropriate side of the damper to allow routine maintenance.

1.6 B4 – External Fire Spread

Approved Document B provides guidance on separation between buildings and boundaries.
The intent of this guidance is to reduce the potential for fire spread between buildings via

both direct flame impingement and radiant heat.

External fire spread conditions should be assessed on a case-by-case basis as these
depend on a number of factors including, though not limited to, the presence of adjacent

buildings and the site boundary.

Document Classification Final Document Ref: 3.1-RCS-RHSE-(110)-263 Version 1.1
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