PREFABRICATED, MODULAR, FIRE RESISTANCE AND NON-FIRE RESISTANCE RATED VENTILATION DUCT ASSEMBLY WITH INTEGRAL SUBDUCTS

摘要

A prefabricated, modular, duct assembly comprising a main duct having an outer wall, an inner wall, a first end and a second end. A horizontal duct assembly extending through the main duct between the first end and the second end. A vertical duct assembly extending along the inner wall from the horizontal duct assembly to the first end.