Page 20 - Caswell Firesafe Manual 2018
P. 20
TECHNICAL MANUAL
FFRDL / TM / BS / 01 / 2018
As every site can differ and service penetrations can be utilised by multiple services it may be necessary to
either find an alternative route for the fire resisting ductwork or obtain an assessment for an alternative method
of sealing the compartment penetration.
In any situation where the tested or assessed methods cannot be used it is mandatory to obtain the advice
and expert opinion of a specialist in the field. This should be followed up by a written assessment report which
would include full details of the alternative method to be used.
The local authority / building control should also be made aware of any non-standard methods as, ultimately,
it is their responsibility to 'sign off' the building for fire safety.
The positioning of supports in relation to the wall / floor penetration is also critical to minimise the stress
imposed on the penetration seal. Typically supports should be fitted within 250mm (max) from either side of
the penetration.
The CASWELL FIRESAFE ® system has two alternative methods of dealing with penetrations through
compartment walls / floors as detailed below:
3141/109 Rev B
20 www.firesafeductwork.co.uk
