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RE: Handrails...

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Although building codes do not specify a deflection limit, there is an
ASTM Standard that does - but this would only apply if the railing were
specified to conform to the ASTM standard. 
Refer to ASTM E 985, Std Spec for Permanent Metal Railing Systems and
Rails for Buildings, Section 7.2, Deflection Criteria. Horizontal
deflection at the post is limited to H/12 and mid-span of rail is
H/24+L/96 (H = post hgt; L = post spacing). (Also note that ASTM E894
and E935 cover test methods for railings.)

William C. Sherman, PE
(Bill Sherman)
CDM, Denver, CO
Phone: 303-298-1311
Fax: 303-293-8236
email: shermanwc(--nospam--at)


	From: David Fisher [mailto:dfisher(--nospam--at)] 
	Sent: Tuesday, January 11, 2005 1:27 PM
	To: seaint(--nospam--at)
	Subject: Handrails...

	List members:

	What is the allowable deflection for a handrail?
	I'm reviewing the misc metal guy's calcs and he's getting 1.75
	For a 42" high railing on a balcony 10" long (wide).

	Seems excessive to me
	Any thoughts?

	David L. Fisher SE PE
	Fisher + partners
	372 West Ontario
	Chicago 60610
	312.573.1726 fax
	312.622.0409 mobile 

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