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RE: 3D model with metal deck diaphragm

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Metal roof decks are typically not considered as rigid diaphragms and are more commonly modeled as flexible.


D. Matthew Stuart, P.E., S.E., F.ASCE, SECB

Senior Project Manager

Structural Department


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-----Original Message-----
From: SE California [mailto:se.california(--nospam--at)]
Sent: Tuesday, October 16, 2007 11:49 AM
To: seaint(--nospam--at)
Subject: RE: 3D model with metal deck diaphragm




From: Alex C. Nacionales [mailto:anacionales(--nospam--at)]
Sent: Tuesday, October 09, 2007 6:10 PM
To: seaint(--nospam--at)
Subject: Re: 3D model with metal deck diaphragm




    It should be modeled as a rigid diaphragm.Depending on dimesions of the roof framing, corrugated metal roofing on steel trusses could also be modeled as ridig diaphragm.



----- Original Message -----

From: William.Sherman(--nospam--at)

To: seaint(--nospam--at)

Sent: Tuesday, October 09, 2007 3:27 AM

Subject: 3D model with metal deck diaphragm


When performing a 3-D structural analysis of a complex steel building with metal deck roof, how is the metal deck typically modeled (i.e., stiffness, load distribution, attachment to trusses, etc)?


(I tried searching the archives but couldn't find much other than "why do you want to model a flexible diaphragm?")



William Sherman - CH2M HILL / Denver

Structural Technology Discipline Leader (TeD)

Engineering Design Group - Civil / Federal Engineering (EDG-CFE)



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