Now let s work on an example.
Steel roof diaphragm design example.
A roof design gives the chance to extra floor space in the roof volume similar to a space or upper room space.
The roof deck is supported by joists that are thick and spaced at 5 ft.
The sdi diaphragm design manual third edition is an excellent design reference every engineer should utilize if designing with steel deck diaphragms.
Design rigidity means relative rigidity.
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.
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.
And a width b 300 ft.
The roof diaphragm design example can go up against different style that when nitty gritty right can ooze a cutting edge feel.
Design a roof deck for a length of l 500 ft.
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.
Themaximum end reaction r of the roof diaphragm therefore is ww wl x l 2.
Design criteria and specifications a.
Design the diaphragm for wind loading using allowable stress design method.
See the attached examples and video to really help better understand general diaphragm design better.
Main features roof diaphragm design example.
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.
Timber beam design seismic forces wind forces floor shearwall diagram lateral loads roof diaphragm design shearwall design continuous footing design.
The actual behavior may more closely resemble a continuous beam with intermediate supports.
It should be noted that the flexible diaphragm presented in the example is a conservative approach as it assumes two simple spans.
2003 international building code.
Astm a36 fy 36 ksi for structural steel astm a615 gr 40 for 3 4 gr 60 for 5 and larger rebar.
The roof deck is a wr wide rib type panel with a panel width of 36.
The sdi diaphragm design manual third edition is an excellent design reference every engineer should utilize if designing with steel deck diaphragms.
