Abstract
ABSTRACT Aseries of diaphragm designs had been developed to meet the wind-bracing requirements of typical wood stud framed farm buildings. These designs were based on conventional beam theory and were validated by laboratory tests. Ceilings of typical Canadian farm buildings are sheathed with butt-joined plywood fastened with large-head galvanized roofing nails, or with lap-joined galvanized steel fastened with power-driven self-drilling roofing screws. Advantages of lap-joined, screw-fastened sheet steel are discussed. Design procedures are given for the inter-panel and diaphragm-to-wall connections required to resist shear and bending stresses in the ceiling and walls, as determined from design wind loads according to the National Building Code of Canada (1980). Other wind-resisting diaphragm applications are introduced, such as plywood floor diaphragms in multi-story barns, and roof-wall diaphragms in uninsulated steel-clad storage sheds.
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