Roof Wall Diaphram

Roof framing and 3 adequate connections between the roof structure and the top of the wall to create a complete vertical load path.

Roof wall diaphram.

At the roof level these wall reactions turn the load in the roof system in the plane of the roof. 134 2015 ibc seaoc structural seismic design manual vol. Zones near the mid span of the roof are subjected to less unit shear therefore less. A diaphragm acts like a short deep beam.

Wood frame structural panel diaphragms shall be designed and constructed in accordance with af pa sdpws where panels are. The roof and foundation support the vertically spanning wall and consequently pick up the developed horizontal reactions. However the wall diaphragm moment equals r x h. Request that any youngster draw a house and theyll draw a house with a peak roof.

The maximum average shear r b occurs at the ends of the roof diaphragm. The diaphragm forces tend to be transferred to the vertical resisting elements. Because this building has one story assume that the seismic weight is concentrated at roof level. Assuming a flexible roof diaphragm determine the forces in walls a b c and d for north south loading.

Also assume the mass is evenly distributed over the entire roof. The roof structure consisting of the roof framing roof decking sheathing and any internal bracing also functions as a horizontal diaphragm and transfers the horizontal loads. Main features roof diaphragm design example. 5 2012 ibc 2306 2 wood diaphragms 2306 2 1 wood frame structural panel diaphragms.

The roof diaphragm design example has for some time been a piece of customary structural history. It should also be noted that. So how has this generally conventional roof diaphragm design example discovered its way into present day engineering. 2 design example 2 n flexible diaphragm design the uniform loads w 1 and w 2 in the east west direction are computed using the diaphragm lengths and wall heights.

In structural engineering a diaphragm is a structural element that transmits lateral loads to the vertical resisting elements of a structure such as shear walls or frames diaphragms are typically horizontal but can be sloped such as in a gable roof on a wood structure or concrete ramp in a parking garage.