1 Scope
This part of BS 7346 gives recommendations and guidance on functional and calculation methods for smoke and heat exhaust ventilation systems for steady-state design fires . It is intended for a variety of building types and applications, including single-storey
buildings, mezzanine floors , warehouses with palletized or racked storage, shopping malls, atria and complex
buildings, car parks, places of entertainment and public assembly and uncompartmented
space within multi-storey buildings.
This standard does not include any functional recommendations for design parameters
where the primary purpose of the SHEVS is to assist fire-fighting.
NOTE Such functional recommendations need to be agreed with the fire service responsible
for the building in question. The calculation procedures set out in the annexes of
this document can be used to design the SHEVS to meet whatever recommendations have
been agreed.
This standard does not cover the following:
— smoke clearance, where smoke is exhausted from a building after the fire has been
suppressed;
— cross-ventilation, where wind-induced or fan-induced air currents sweep smoke through
and out of the building, usually as part of fire-fighting operational procedures;