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Re: Diaphragm design

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Title: Diaphragm design

The collector element, splices, and the connection of the collector to the resisting element all require Omega level design. (UBC)
Since the diaphragm is your collector, the dowels will require Omega level capacity.
----- Original Message -----
Sent: Tuesday, February 15, 2005 1:44 PM
Subject: Diaphragm design

Good morning fellow engineers,

I will like to have your opinions on the following subject:

Building condition: We have an unfactored collector force of 500 kips to be developed in a 30’ long concrete shear wall. The slab is a concrete fill on composite metal deck. The corresponding Ω factor is 2.5. We are using rebars dowels to transfer the forces from the slab into the wall.

We have the following question regarding diaphragm design. Shall the Ω factor be applied to the 500 kips for design the dowels? We will like to hear from our fellow engineers your opinions on the application of the Ω factor.

Thank You in advance

Cairo O. Briceño, SE, PE, ASCE and SEAOC
Structural Engineer
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