Importance

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Abstract

A duct assembly made from multiple duct sections for transporting pressurized fluid therethrough which can be formed simply by laborers at a building site or elsewhere and has a strong joint resistant to leakage. The joint rigidizes each duct section and the duct assembly, permitting duct assemblies including a greater number of joined duct sections to be put together and lifted into place The joint is formed by passing fasteners through a corner flange connection member associated with one duct section, through integral flanges of the one duct section and other duct section arranged in end-to-end relation with the one duct section, and through a corner flange connection member associated with the other duct section. The act of installing the fastener tightly pulls together the integral flanges and makes and integral connection between them. Additional sealing may be provided applying a flowable sealant between the flanges before the fasteners are tightened to bring the integral flanges of the duct sections into clamping relationship. The joint can be formed using conventional corner pieces which are modified to accept fasteners simultaneously through the corner pieces and integral flanges of the duct section. A method of assembly and a corner flange connection member are also disclosed.

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First Claim