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RE: catwalk railing

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OSHA requires that we design to the strength of the materials for the loads below with no mention of AISC. We tested a 1.25" std post to failure. The post deflected at 400-lb and failed at over 750-lb. We would have required 1.5" std per AISC ASD.  Based on our test, I would suggest either using the actual material strength from mill certs or using ~0.9Fy for bending stress. OSHA also has deflection limits. They may actually control the design.
-----Original Message-----
From: Lutz, James [mailto:James.Lutz(--nospam--at)]
Sent: Friday, April 01, 2005 9:04 AM
To: 'seaint(--nospam--at)'
Subject: RE: catwalk railing

I sure wouldn't want to walk on one that was designed for less. You should check your state's OSHA type regulations as well as the building code. Sometimes the OSHA requirements govern.
-----Original Message-----
From: Bruce Holcomb [mailto:bholcomb(--nospam--at)]
Sent: Friday, April 01, 2005 8:44 AM
To: seaint(--nospam--at)
Subject: catwalk railing

We are designing a catwalk and are wanting to spread out the railing posts as far as possible.  Do we have to follow the code prescribed 200 lb concentrated load or 50 plf uniform load... or are there any different requirements for catwalks?



Bruce D. Holcomb, PE, SE

Structural Engineer & Vice President

Butler, Rosenbury & Partners

319 North Main, Suite 200

Springfield, MO 65806




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