Cantilevered Roof Diaphragm

A diaphragm structure results when a series of such vertical and horizontal diaphragms are properly tied together to form a structural unit.

Cantilevered roof diaphragm.

Of the roof diaphragm therefore is ww wl x l 2. Offset roof planes roof framing must keep diaphragm in plane load on diaphragms may be different due to different heights. R divided by length b equals the collector load or maximum uniform shear force in the diaphragm. A shear wall however is a vertical cantilevered diaphragm.

The economy of the gerber system is obtained from simple repetitive framing in stabilized relatively uniformly loaded structures. Semi rigid diaphragm diaphragm flexibility asce 7 sec. What is the deflection equation for open front cantilever diaphragms. The following steps can be followed.

What are the available methods of distributing torsional forces into the diaphragm. Diaphragm design manual third edition appendix viii addendum august 2013 hilti pin x hsn 24. 12 3 1 unless it can be idealized as flexible or. Shear wall a vertical structure which acts as a cantilevered diaphragm chord the edge member of a diaphragm peter von buelow university of michigan tcaup slide 5 of 28.

Type specifies whether the diaphragm is rigid membrane or flexible for a beam supported floor or rigid membrane or semi rigid for concrete floor slab. How is diaphragm flexibility defined for open front cantilever diaphragms vs. A diaphragm is a flat structural unit acting like a deep thin beam. The term diaphragm is usually applied to roofs and floors.

Proportion load rationally. Introduction the structural steel roof framing described in this publication and commonly called the cantilever girder or gerber system has been used successfully for many years throughout north america. Asce 7 16 figure 12 3 1. The maximum roof diaphragm moment m equals ww wl x l2 8.

If a diaphragm has been defined as flexible within risafloor it can be toggled between rigid and flexible in risa 3d. This label is used for the naming of diaphragm regions. The corresponding diaphragm chord forces are therefore equal to.