Roof Wall Diaphram

Assuming a flexible roof diaphragm determine the forces in walls a b c and d for north south loading.

Roof wall diaphram.

5 2012 ibc 2306 2 wood diaphragms 2306 2 1 wood frame structural panel diaphragms. The roof and foundation support the vertically spanning wall and consequently pick up the developed horizontal reactions. Request that any youngster draw a house and theyll draw a house with a peak roof. Roof dead load 14 psf.

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. 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. Also assume the mass is evenly distributed over the entire roof.

Roof framing and 3 adequate connections between the roof structure and the top of the wall to create a complete vertical load path. At the roof level these wall reactions turn the load in the roof system in the plane of the roof. The roof diaphragm design example has for some time been a piece of customary structural history. Zones near the mid span of the roof are subjected to less unit shear therefore less.

It should also be noted that. Main features roof diaphragm design example. So how has this generally conventional roof diaphragm design example discovered its way into present day engineering. Because this building has one story assume that the seismic weight is concentrated at roof level.

However the wall diaphragm moment equals r x h. This horizontal element is known as the diaphragm. Side wall carries load to roof diaphragm at top and to foundation at bottom roof horizontal diaphragm carries load to end walls end wall vertical diaphragm or shear wall carries load to foundation v lb per lin ft of diaphragm width w lb per lin ft of wall f t lb c vh h 2 wl 2b wind load lb per sq ft figure 1. 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.

A diaphragm acts like a short deep beam.