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- To: <seaint(--nospam--at)seaint.org>
- Subject: Pipe sizes
- From: "Roger Davis" <sds(--nospam--at)sdsarch.com>
- Date: Wed, 28 Oct 1998 07:07:32 -0600
From: Robert Rollo I have had a curiosity question for quite some time. Sure, I know of the existance of "schedule #'s" for pipe sizing (SCH 10, 20 , 40 , 80, 120), but what does that really mean? What is the history of these numbers? Whose "schedule" is it? Despite repeated reminders, I can not seem to get my architects to quit indicating 1 1/2 " SCH40 handrails, whick exceed maximum allowable OD. Does anyone out there specify round tube per A500B like 1 1/2 x 1/8 for handrails? I often see 1 1/2" SCH10 for rails, which are compliant. IN RESPONSE The Office of Technical and Information Services, U.S. Architectural and Transportation Barriers Compliance Board, telephone (202)272-5434, has issued a rare written interpretation of ADAAG paragraph 4.26.2 stating "standard IPS handrail sections designated as nominal 1-1/4 inch and 1-1/2 inch diameter are considered to fall within conventional building industry tolerances for the purposes of this provision." Roger Davis SDS Architects, Inc.
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