Roof Deck Diaphragm Design Example

R divided by length b equals the collector.

Roof deck diaphragm design example.

Features for creating steel deck diaphragm design example. Design the steel deck sheets used for roofs and floors provide support for gravity loads between the joists and or beams. Example sg adjustment factors adjustment for framing g species combination specific. Shear transfer from roof diaphragm to shearwall.

And a net uplift of 30 psf. Of importance is the in plane rigidity of the diaphragm relative to the walls or frame elements that transmit the lateral forces to the ground figure 4 29. The roof deck is supported by joists that are thick and spaced at 5 ft. The basic rule is.

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. 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. After you have summed all the expenses add 10 from above since the rule is that the final cost of the project is always higher than the original one. Roof framing force transfer from diaphragm to shearwall.

The price depends on the selected materials as well as on the complexity of steel deck diaphragm design example. Themaximum end reaction r of the roof diaphragm therefore is ww wl x l 2. Association csa and recommended by the steel deck institute sdi. The roof deck is a wr wide rib type panel with a panel width of 36.

Design the diaphragm for wind loading using allowable stress design method. Once installed these sheets can also be used as a horizontal brace and therefore the steel deck acts as a diaphragm. Lbs ft plf 2. A similar design is required in the other orthogonal direction east west.

Wood sw and diaphragm design design capacity increase wind sdpws tables 4 2a 4 2b 4 2c 4 2d. 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. Design rigidity means relative rigidity. A concrete floor is relatively rigid compared to steel moment frames whereas a metal deck roof is relatively flexible compared to concrete or.