Roof Deck Diaphragm Design Example

Main features roof diaphragm design example.

Roof deck diaphragm design example.

This example illustrates the design of a large flexible diaphragm in a big box retail store subjected to lateral seismic loading. The roof deck is supported by joists that are thick and spaced at 5 ft. And a width b 300 ft. Design the diaphragm for wind loading using allowable stress design method.

The roof acting as a simple span horizontal girder of depth b distributes the wind line load as a shear reaction along the top of the end walls perpendicular to l. First off the roof diaphragm design example is an extremely basic direct and utilitarian design every single current trademark. Now let s work on an example. A line load reaction of this pressure is distributed to the top of the wall at the roof plane via the vertical spanning capacity of the cladding over height h.

In figure 1 wind pressure on the walls parallel to length l act on the building. The sdi diaphragm design manual third edition is an excellent design reference every engineer should utilize if designing with steel deck diaphragms. Figure 1 illustrates the basic concept for a roof and wall diaphragm. The roof deck is a wr wide rib type panel with a panel width of 36.

The manual includes pertinent design information considerations fastener information deck shear capacity tables and a plethora of highly relevant design examples stepping you through all the. A roof design gives the chance to extra floor space in the roof volume similar to a space or upper room space. The manual includes pertinent design information considerations fastener information deck shear capacity tables and a plethora of highly relevant design examples stepping you through all the. The roof structure consists of a panelized hybrid roof system which is very common in large diaphragm roofs in the seismically active western united states.