To: "'seaint(--nospam--at)seaint.org'" <seaint(--nospam--at)seaint.org>
Subject: RE: 1951 Steel Roof Trusses
From: Jeff Williams <jwilliams(--nospam--at)paradigmse.com>
Date: Wed, 17 Jan 2001 19:25:36 -0500
Thanks Roger for the info., this helps for one of the trusses.
On the web site (bethsteel.com) I was able to find a list of past catalogs dating as far back as 1920 that can be downloaded.
From: Roger Turk [SMTP:73527.1356(--nospam--at)compuserve.com]
Sent: Wednesday, January 17, 2001 2:52 PM
Subject: Re: 1951 Steel Roof Trusses
I have part of a Bethlehem joist catalog that was passed on to me by a
colleague that gives numbers similar to what you have, but I don't know what
year it might be. The part of the catalog that I have does have a type 248
joist, but doesn't have any of the other numbers. I have pages 31-34, so
there is an awful lot of the catalog that I don't have.
A telephone number (10-years old) that I have is, (215) 694-5720, but verify
the area code as a lot have changed in the past 10 years.
Here is some information on the #248 joist. If it matches, then you probably
do have a Bethlehem product; if it doesn't, well, you'll just have to keep
End panel length: 2'5-1/4"(min) to 4'0-3/4"(max)
Interior panels: 3'-3"
Top chord: (2) L3 X 3 X 1/4
Bottom chord: (2) L2-1/2 X 2-1/2 X 1/4
End vertical strut: (2) L2 X 2 X 3/16 <--At 1st int. panel pt.
Int. vert. struts: (2) L1-1/4 X 1-1/4 X 3/16
End diagonal: (2) L2 X 2 X 1/4
1st Int. diag: Bar 2-1/2 X 5/16
2nd Int. diag: Bar 2-1/2 X 1/4
Remaining diags: Bar 2 X 1/4
Sorry that I can't be of more help.
A. Roger Turk, P.E.(Structural)
Jeff Williams wrote:
This may have been asked before, but I have the following dilemma. We are
modernizing several buildings of a 1951 school in the San Francisco area
and the roof members are constructed with steel trusses. I have contacted
several manufactures about the truss properties, but I'm have no luck.
Therefore, if someone can direct me to a piece of literature or if someone
might have the properties associated with the followings truss
designations, it would be greatly appreciated.
The truss designations on the drawings are as follows:
Jeff Williams, S.E.<<