Roof Diaphragm Design Example

1 applicable to all roof slopes with and without roof irregularities exposure b.

Roof diaphragm design example.

The sdi diaphragm design manual third edition is an excellent design reference every engineer should utilize if designing with steel deck diaphragms. The actual behavior may more closely resemble a continuous beam with intermediate supports. Shear nailing of the roof diaphragm north south the diaphragm loaded in the north south direction has been selected to illustrate the design of a wood structural panel roof diaphragm. D roof the weight tributary to the diaphragm at roof level roof dead load the weight.

Table 3 16a1 roof diaphragm limits for wind. The seismic force on the diaphragm is calculated using the following formula. D roof f. See the attached examples and video to really help better understand general diaphragm design better.

R divided by length b equals the collector. D roof where f. Design example 2 n flexible diaphragm design diaphragm unit shear at the east side of line 3 and at line 9 is 136 000 160 850. Roof seismic force at roof level v n s for single storey building.

Themaximum end reaction r of the roof diaphragm therefore is ww wl x l 2. The roof diaphragm design example can go up against different style that when nitty gritty right can ooze a cutting edge feel. First off the roof diaphragm design example is an extremely basic direct and utilitarian design every single current trademark. For the roof in this example the total uniform load on the diaphragm equals the combined effects of the windward and leeward cladding reactions ww wl.

Section 2305 general design requirements for lateral force resisting systems 2305 1 general. Wood frame shear wall and diaphragm design ricky mclain ms pe se technical director woodworks texas workshops december 2016. Roof the weight tributary to roof level. Lbs ft plf 2.

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 intricate details and covering nearly any. It should be noted that the flexible diaphragm presented in the example is a conservative approach as it assumes two simple spans.