bill1952
SAWHORSE
Im trying to determine if the 4" sphere rule applies to infill under a handrail on an IRC spiral stair handrail. I think it does but find do many examples where it obviously does not.
-
Welcome to the new and improved Building Code Forum. We appreciate you being here and hope that you are getting the information that you need concerning all codes of the building trades. This is a free forum to the public due to the generosity of the Sawhorses, Corporate Supporters and Supporters who have upgraded their accounts. If you would like to have improved access to the forum please upgrade to Sawhorse by first logging in then clicking here: Upgrades
IRC spiral stair guards
- Thread starter bill1952
- Start date
tbz
Silver Member
Bill,
The infill on stairs within the IRC since 2003 is 4-3/8".
Spiral or straight or winders, they are all the same as that requirement is i the guard section.
The infill on stairs within the IRC since 2003 is 4-3/8".
Spiral or straight or winders, they are all the same as that requirement is i the guard section.
Mr. Inspector
SAWHORSE
2018 IRC
R312.1.3 Opening limitations. Required guards shall not
have openings from the walking surface to the required
guard height that allow passage of a sphere 4 inches (102
mm) in diameter.
Exceptions:
1. The triangular openings at the open side of stair,
formed by the riser, tread and bottom rail of a
guard, shall not allow passage of a sphere 6
inches (153 mm) in diameter.
2. Guards on the open side of stairs shall not have
openings that allow passage of a sphere 43/8
inches (111 mm) in diameter.
R312.1.3 Opening limitations. Required guards shall not
have openings from the walking surface to the required
guard height that allow passage of a sphere 4 inches (102
mm) in diameter.
Exceptions:
1. The triangular openings at the open side of stair,
formed by the riser, tread and bottom rail of a
guard, shall not allow passage of a sphere 6
inches (153 mm) in diameter.
2. Guards on the open side of stairs shall not have
openings that allow passage of a sphere 43/8
inches (111 mm) in diameter.
bill1952
SAWHORSE
Thank you. That was my conclusion but interesting how many don't seem to meet it.