A floor or roof deck that acts like a horizontal beam to spread wind and earthquake forces to the building's walls and frames.
A horizontal structural element, typically a floor or roof deck, that distributes lateral forces to vertical load-resisting elements such as shear walls or braced frames. Diaphragms act as horizontal beams, collecting wind or seismic loads from the building facade and delivering them to the lateral system. Their rigidity classification—rigid or flexible—affects how loads are distributed.
The steel deck roof diaphragm collects wind loads from the north wall and transfers them to the shear walls at each end of the building.
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