Roof Diaphragm Design Example

Roof seismic force at roof level v n s for single storey building.

Roof diaphragm design example.

Main features roof diaphragm design example. Section 2305 general design requirements for lateral force resisting systems 2305 1 general. The roof diaphragm design example can go up against different style that when nitty gritty right can ooze a cutting edge feel. The actual behavior may more closely resemble a continuous beam with intermediate supports.

Themaximum end reaction r of the roof diaphragm therefore is ww wl x l 2. See the attached examples and video to really help better understand general diaphragm design better. 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. 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.

R divided by length b equals the collector. Structures using wood frame shear walls or wood frame diaphragms to resist wind seismic or other lateral loads shall be designed and constructed in accordance with af pa sdpws and the applicable provisions of sections 2305 2306 and 2307. D roof the weight tributary to the diaphragm at roof level roof dead load the weight. The sdi diaphragm design manual third edition is an excellent design reference every engineer should utilize if designing with steel deck diaphragms.

Roof the weight tributary to roof level. Wood frame shear wall and diaphragm design ricky mclain ms pe se technical director woodworks texas workshops december 2016. It should be noted that the flexible diaphragm presented in the example is a conservative approach as it assumes two simple spans. D roof f.

Lbs ft plf 2. First off the roof diaphragm design example is an extremely basic direct and utilitarian design every single current trademark. Table 3 16a1 roof diaphragm limits for wind. 1 applicable to all roof slopes with and without roof irregularities exposure b.

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. The seismic force on the diaphragm is calculated using the following formula.