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RE: Bar Joists

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Title: RE: Bar Joists

SJI's "50-Year Steel Joist Digest" shows 18H5 spanning 30'-0" to have a capacity of TL=241 plf and LL=157 plf for 1/360 deflection.  Resisting moment = 325,000 in-lb.  Maximum end reaction = 4500 lbs.  Weight of joist = 8.0 plf.

-------------------------
Joel Adair, EIT
Halff Associates, Inc.
E-mail: jadair(--nospam--at)halff.com
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-----Original Message-----
From: Todd Hill [mailto:thill(--nospam--at)tkarch.com]
Sent: Friday, September 15, 2000 10:40 AM
To: SEAINT (E-mail)
Subject: Bar Joists


I have structural drawings dated 1978 for a project in Oklahoma.
The drawings call out a 18H5 joist on 5'-0" centers, spanning 30'-0".
Anyone know what the capacity for this joist would be?
Anyone know what the history of this lettering for steel joists?
Most recent catalogs I have, list K series joists.
I also have older information on J series joists.
What do the letters actually mean?

Todd Hill
TK Architects, Inc.
816-842-7552 ext. 233


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