Clarifying Handrail Bracket Clearance

The required clearance between a handrail and other building elements continues to confound and confuse. Here’s a quick review of where present codes now stand.

The 1992 Americans With Disabilities Act Accessibility Guidelines (ADAAG) stated that there was to be an absolute dimension of 1-1/2″ between a handrail and a wall. This was actually a “grab bar” dimension which was part of an old version of ANSI A117.1. Its purpose was to avoid someone from getting caught between the wall and the handrail. ANSI changed the notation to 1-1/2″ minimum in 1990.

This was not the case with ADAAG which took 20 years to be updated. The 2010 ADA Standards for Accessible Design now requires a 1-1/2″ minimum, as does the IBC, IRC and ANSI A117.1.

The National Fire Protection Association (NFPA) however is not on the same page with their requirements. Originally created as part of their building code — NFPA 5000 — but now included in NFPA 101 — Life Safety Code, the NFPA requires a 2-1/4″ clearance between the wall and the handrail. This may result in a railing that will be passed by the building inspector but not accepted by the fire inspector. Please note that as of Jan. 20, 2017, the Occupational Safety and Health Administration (OSHA) now requires a 2-1/4″ minimum clearance as well.

Codes also generally require that there be a 1-1/2″ clearance between the underside of the handrail and any obstruction — including the horizontal bracket arm. There is an allowance however for variations in the handrail size — for every 1/2″ of additional perimeter dimension over 4″, you may subtract 1/8″ from the clearance requirement. For example:

OD Perimeter Subtract from
1-1/2″ Requirement
Clearance From
Underside of Railing
1.25″ 3.92″ 1-1/2″
1.50″ 4.71″ -1/8″ 1-3/8″
1.66″ 5.21″ -1/4″ 1-1/4″
1.90″ 5.97″ -1/2″ 1″
2.00″ 6.28″ -1/2″ 1″

As always, we strongly recommend that you confirm all code issues with your local officials prior to specifying.

Contact us for assistance with your project.

Building on a 165-year legacy, Wagner is the go-to resource for metal fabricating and architectural railing expertise. More than just a manufacturer and worldwide supplier, our niche focus and local market knowledge enable us to innovate so we can better adapt to customer needs.

Accommodating to work with, Wagner lives to collaborate. Our customers rely on us to provide the best possible solution for any installation. Responsive to answering calls and quick to solve problems, we remain an active partner throughout projects and in building long-lasting relationships. As proud and knowledgeable metal workers, we’re passionate about helping our customers find a better, faster, and higher overall value solution. As the experts in code requirements, we work with you to help ensure your specifications and installations meet or exceed them, worldwide.

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