Technical Booklet E Fire Safety·Page 110·4.27
Pipes for oil or gas and ventilation ducts in protected shafts
Protected shafts containing stairs or lifts must not contain oil pipes (except in hydraulic lift mechanisms) or ventilation ducts (except for shaft pressurization or stairway ventilation). Gas pipes must be adequately ventilated and of specific materials.
Where a protected shaft contains –
(a) a stairway and/or a lift it should not contain –
(i) a pipe conveying oil, other than in the mechanism of a hydraulic lift; or
(ii) a ventilation duct, other than a duct provided for the purposes of pressurizing the shaft to keep it free from smoke in the event of fire or a duct provided solely for ventilating the stairway; and
(b) a pipe conveying flammable gas it should be adequately ventilated directly to external air by ventilation openings at both high and low levels in the shaft. Any pipe conveying natural gas or LPG should be of screwed steel or of all welded steel construction.
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