FIRE-RATED MODULAR DUCT ASSEMBLY SUITABLE FOR EXHAUSTING FLAMMABLE OR HAZARDOUS GASES, VAPOURS AND OTHER MATERIALS

摘要

A fire-rated exhaust duct system comprising a modular configuration or structure. The fire-rated exhaust duct system comprises a plurality of exhaust duct sections. Each of the exhaust duct sections is configured to be joined or connected with other exhaust duct sections in the field or at an installation site, e.g. in building housing a kitchen facility or a laboratory facility to form longer sections or runs for exhaust duct system.