Min. Walkway or platform width

[SKJ25POL]

Hi
May I ask if anyone knows of any code statement or something from somehere that they give the limits for the width of an elevated walkway (outside of the building) parallel to building?

Location: United States.
Type of structure: Steel structure in an Industrial Facility/Plant

Don't know to use 2'-6" , 3'-00" or 4'-00"?
I appreciate if anyone that has designed platforms and walkways let me know where to get the min. width for an elevated platform/walkway?

Purporse: We have cut an openning in higher level of exterior of a building, the walkway is along building (metal siding).

Thank you

 

[BUGGAR]

I believe OSHA covers industrial facilities. Section 19??

 

[Once20036]

I got into this recently and used the NFPA standard:

NFPA 101 table 40.2.5.2.1 - Industrial equipment access dimensional criteria
Minimum horizontal dimension of any walkway, landing, or platform - 22" clear

 

[Rainbowtrout]

I usually do 36", which is the stairway width requirement by IBC. Most of the walkways have a stairway leading to it anyway.

http://publicecodes.cyberregs.com/icod/ibc/2009/icod_ibc_2009_10_sec009.htm

IBC 2012 has the code moved into another section, but I believe the general requirement hasn't changed.

 

[thaidavid40]

The 22" clear inside dimension is the minimum limit. However, if you've ever tried to walk one of these narrow walkways before - especially when you are up really high, and trying to carry a load of tools - it can be very uncomfortable. I try to never go less than 36" clear, if at all possible. What is code, and what is comfortable, are not always the same.

Thaidavid