Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

Re: Mill tests

[Subject Prev][Subject Next][Thread Prev][Thread Next]
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.

This is what I do.  Does anyone have other input or ideas?


Lester Rhinehart, P.E., S.E.
VITOK Engineers, Inc.
Louisville, KY  40299

----- Original Message -----
From: "Sherman, William" <ShermanWC(--nospam--at)>
To: <seaint(--nospam--at)>
Sent: Tuesday, December 12, 2000 9:59 AM
Subject: RE: Mill tests

> Although I have always required 1-1/2-inch "nominal diameter" pipe (1.900"
> OD) for pipe railings, an NAAMM publication claims that OSHA requirements
> have been clarified to mean "that the outside diameter shall not be less
> than 1-1/2-inches - thus a 1-1/4-inch IPS pipe having an actual outside
> diameter of 1.66-inches meets this requirement." And the ASTM standard for
> metal railing systems (ASTM E985) states that the hand-grip "shall not be
> less than 1-1/4-inches nor more than 2-inches in outside diameter". Thus
> appears that 1-1/4-inch diameter pipe is accepted in the industry despite
> its apparent inconsistency with a literal reading of the wording in OSHA.
> Mark  Jones wrote:
> In the case of handrails, this is moot because OSHA requires 1 1/2" nom.
> railings.
> "29 CFR 1910.23(e)(3)(ii)
> (e)(3)(ii)
> For pipe railings, posts and top and intermediate railings shall be at
> 1 1/2 inches nominal diameter with posts spaced not