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# Re: Mill tests

• To: <seaint(--nospam--at)seaint.org>
• Subject: Re: Mill tests
• From: "Les Rhinehart" <l_n_rhinehart(--nospam--at)email.com>
• Date: Tue, 12 Dec 2000 10:31:07 -0500

```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?

Thanks,

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

----- Original Message -----
From: "Sherman, William" <ShermanWC(--nospam--at)cdm.com>
To: <seaint(--nospam--at)seaint.org>
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
it
> 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
least
> 1 1/2 inches nominal diameter with posts spaced not
>
>
>

```