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RE: 30" wide catwalk

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Section 3103.8 of IBC 2006 for Special Construction says unobstructed width not less than 36”.


24”, 30” and 36” seem to be the industry standard.


If this is a mine, I would check the CFR, company standards, or other texts for related information.  In my opinion, I like 36” and I don’t like going less.  It’s been a while since I did a design, so I would have to go digging in books that I don’t have with me right now.



David Maynard, PE

Wester-Wetstein & Associates, Inc.

201 Lakeway Rd. Suite 1000

Gillette, WY 82718

Phone: (307)686-1125

Fax: (307)686-1158

From: Micayas, Julius [mailto:jmicayas(--nospam--at)]
Sent: Monday, June 09, 2008 1:31 PM
To: seaint(--nospam--at)
Subject: 30" wide catwalk




Can anyone confirm that the minimum width of catwalk used in heavy industrial (i.e. for Bulk/Material handling conveyor system) has been changed from 24” to 30” wide? One of our independent checkers made comments regarding this change.


I checked with IBC 2000, 2003 and 2006 nothing mentioned about the change.






Engr. Julius Micayas

P.E. license no.32969

Project Manager/Sr Lead Structural Engineer

River Consulting LLC

111 Veterans Memorial Boulevard

               Suite 1600

Metairie, Louisiana 70005

Phone - 504-841-3014 (direct)

504 837-5275 (office)

Fax - 504-837-2986

E-mail: jmicayas(--nospam--at)