Subject: Re: Pre-Engineered Metal Building-New Thread
Date: Fri, 18 May 2001 12:07:46 -0600
Good for you, Ron! I can't wait to see the results, assuming you will
publish them on the list server that is.
I would like to suggest a modification to your item 7. You might
consider adding loads to COLUMNS as well as to roof members. I just
helped a client add jib cranes to the columns of of a PEMB and it turned
out to be more work than I anticipated. To give you an idea of how
closely the building was designed, the building met code when designed
(1.7 kPa snow loading) but did not meet present code (1.8 kPa snow
loading). For those not on metric, 1 kPa = 20.7 p.s.f.
Good luck on your project.
H. Daryl Richardson
Calgary, Alberta, Canada
> Based on the previous Pre-engineered building threads I have read, it seems
> there is a lot of skepticism in general with the usage of them and what we as
> engineers should do when working with PEMB on a project. As I have stated
> before, I worked for several years for a PEMB supplier and for the last 11
> years have dealt with PEMB many times as both a foundation designer and
> assisting Clients in purchasing/constructing one. I do not have any problems
> with their design or concepts provided they come from reputable companies.
> There are many companies out there that manufacture them. I live in the
> Southeast, and I believe this area has the largest number of suppliers than
> any other geograhical region due to our small magnitude of design loads.
> Snow and Earthquake?..what are those? Due to this, we also have the largest
> number of extremely "low-end" metal building suppliers that do not even have
> a PE on staff.
> I thought I would write a brief outline/guideline of what engineers should
> look for or think about specifying when dealing with a PEMB. Hopefully, this
> would give you some peace-of-mind when dealing with them. I thought the
> document would be better-presented if I addressed the subject based on what
> role you were playing in the design process. Below is a quick list I came up
> but I was wanting to know if anyone could think of other roles. I am not
> sure I can come up with any good advice on all topics, but these are the
> roles I have experienced already:
> Role #1--Foundation designer ONLY
> Role #2-Assisting a Client in specifying a PEMB for purchase ONLY
> Role #3-Specifying, Evaluating Bids, Foundation Design, and Monitoring
> Construction (basically everything except actually designing the PEMB)
> Role #4-Investigation/retrofitting of existing PEMB for additional loading
> Role #5-Expert Testimony into an existing PEMB
> Role #6-Evaluating PEMB after a Natural Disaster (Tornado, or that Shaking
> ground thing I always see this List Server discussing)
> Role #7-Attaching concentrated loads to a cold-formed Roof System that was
> designed based on a "pound per square foot" loading.
> Your input would be greatly appreciated.
> Ron Martin
> Martin Stuctural Services, Inc.
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