Fire resistance tests for service installations - Smoke extraction ducts Ingestion-build-83346 BS EN 21089 lays down

BS EN 21089 lays down the taper dimensions and tolerances of electrode taper fits for spot welding electrode caps

Note1: When the determination of the linear density is carried out on sized multifilament tow

Special consideration has been given to the needs of SMEs

— SA - AS 1735: Lifts 1997

Fire resistance tests for service installations - Smoke extraction ducts Ingestion-build-83346 BS EN 21089 lays down1 Scope This Part of this document specifies a test method for determining the fire resistance of smoke extraction ducts. It is applicable only to smoke extraction ducts that pass through another fire compartment from the fire compartment to be extracted in case of fire. It represents fire exposure of a fully developed fire. This method of test is only applicable to fire resisting ducts that have passed the test for the appropriate period to EN 13661