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Re: Open Web Joists/Girders
- To: <seaint(--nospam--at)seaint.org>
- Subject: Re: Open Web Joists/Girders
- From: "Richard M. Beldyk, PE, CPEng, NSPE, CWEng, CPE" <rich(--nospam--at)usbridge.com>
- Date: Tue, 15 Oct 2002 14:20:31 -0400
Read this story about open web joist. " it appears that
undisputed evidence was produced which indicated that the open web bar joists
involved in the collapse had been poorly manufactured and the defective welds
involved simply failed to sustain the loads transmitted thereon."
----- Original Message -----
Sent: Tuesday, October 15, 2002 1:17
Subject: RE: Open Web
have never received stamped shop drawings, but receiving signed and sealed
calculations is pretty common.
I have a project with several buildings that utilize open web joists
and girders and one of the joist/girder suppliers who is bidding the work is
having a lot of heartburn with one of our notes that requires the
joist/girder supplier to submit stamped shop drawings and calculations.
Our drawings have very detailed notes providing all the loading
required for design. These include DL, LL, Adloads, sprinklers, Em,
and roof mounted equipment weights in addition to member spans and spacing.
We have shown typical joist sizes on the drawings but our intention is
that these sizes are only indicative depths for other disciplines to plan
their work. I told the joist/girder supplier he could consider our
sizes as minimums if this made him feel more comfortable and size up if
their calculations so dictate.
This very well known joist/girder supplier said they do not do roof
design, do not provide detailed shop drawings, and do not stamp drawings.
I told this person that he is not designing the roof, only the
joist/girders for the loadings I have specified. I also said I did not
necessarily need DETAILED shop drawings of every joist/girder but could live
with the placement drawings including typical installations details and a
set of calculations that was some how tied in to the placement drawing
joist/girder numbering scheme. He still balked at this and said he
would not bid.
What are others
experiencing with getting stamped drawings and calculations from