Robertson Section 3 Roof Deck Diaphragm Shear Capacity
Robertson Section 3 Roof Deck Diaphragm Shear Capacity
(OP)
I am reviewing a set of old drawings (September 1973) and wanted to see if anyone has any information to determine the allowable diaphragm shear capacity for a 1 ½” Robertson “Q” No. 3 metal deck with welds per the attached; metal deck spans 7.5 feet maximum. I have a 1975 Robertson catalog but it refers to a Robertson representative for the diaphragm capacity.
Any input is appreciated.
Thanks.
Any input is appreciated.
Thanks.






RE: Robertson Section 3 Roof Deck Diaphragm Shear Capacity
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RE: Robertson Section 3 Roof Deck Diaphragm Shear Capacity
RE: Robertson Section 3 Roof Deck Diaphragm Shear Capacity
I kinda dig detail H as a deck edge collector/chord strategy. No field welding and no seat roll over. Maybe I'll try and bring that back.
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Robertson Section 3 Roof Deck Diaphragm Shear Capacity
I like to avoid extensive calculations due to budget constraints.
RE: Robertson Section 3 Roof Deck Diaphragm Shear Capacity
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Robertson Section 3 Roof Deck Diaphragm Shear Capacity
Mike McCann, PE, SE (WA)
RE: Robertson Section 3 Roof Deck Diaphragm Shear Capacity
At KootK - I haven't had to revert to providing the calc's you suggested; had always been able to rely on the published values from the catalogs. I am curious now as to how they obtain the shear capacity values they published in their catalogs. I know someone who works for ASC and will contact him for additional recommendations.
RE: Robertson Section 3 Roof Deck Diaphragm Shear Capacity
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Robertson Section 3 Roof Deck Diaphragm Shear Capacity
RE: Robertson Section 3 Roof Deck Diaphragm Shear Capacity
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RE: Robertson Section 3 Roof Deck Diaphragm Shear Capacity
The alternative on the drawings is Inland B deck. Previously, JedClampett uploaded an Inland-Ryerson ICBO ER that includes the B-Deck shear capacity. See JedClampett's post here: http://www.eng-tips.com/viewthread.cfm?qid=281493
RE: Robertson Section 3 Roof Deck Diaphragm Shear Capacity
wannabeSE - At a glance, I think this may be what I am looking for. Thanks!!!