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RE: Mill tests - handrail and post criteria[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: "'seaint(--nospam--at)seaint.org'" <seaint(--nospam--at)seaint.org>
- Subject: RE: Mill tests - handrail and post criteria
- From: "Scott, William N." <William.Scott(--nospam--at)veco.com>
- Date: Tue, 12 Dec 2000 10:59:22 -0900
Jason We ran into this several years ago while performing a Walking-Working surface survey for an industrial client. The post were ASTM A53, 1.25" pipe. I was looking at major replacement work. We designed a full scale test of the post and loaded it to failure. There was no yielding at 500 pounds. Nor was there significant deflection. We left all the 1.25" pipe post/handrails inplace and use 1.25" pipe for standard post and handrails. Bill Scott, P.E., S.E. Principal Engineer VECO Alaska, Inc. 949 E. 36th Street Anchorage, AK 99508 Phone 907-762-1655, FAX 907-762-1734 -----Original Message----- From: Jason Kilgore [mailto:jkilgore(--nospam--at)leok.com] Sent: Tuesday, December 12, 2000 6:58 AM To: seaint(--nospam--at)seaint.org Subject: Re: Mill tests > This is a question I've have dealt with for years and have resolved using > the following simple logic. > If you check the stress level of a cantilevered 1-1/4" std. pipe for a > railing post using the 200# lateral force at the top using a 42" height, you > will overstress the pipe (fb=35.74 ksi). A 1-1/2" std. pipe fb=25.77 ksi > which is 73.6% of yield (Fy=35 ksi). I use 1-1/2" pipe to avoid yielding > the pipe. That's what our office normally does, and is what started the whole thread. The fabricator on a project, however, wanted to use A500 HSS 1.660"x 0.140 . He provided a mill test certification indicating a yield of 63,000 psi for the actual pipe to be used (minimum yield is 42,000 psi). The HSS 1.660"x0.140 will work as far as stress is concerned. ---- Jason W. Kilgore Leigh & O'Kane, L.L.C. jkilgore(--nospam--at)leok.com (816) 444-3144
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