Section 604.5/Grab Bar Requirements at Water Closets
ANSI A117.1 Section 604.5 specifies grab bar size, location, and installation requirements at accessible water closets.
A side wall grab bar at least 42 inches long must be installed on the wall closest to the water closet. It must extend at least 54 inches from the rear wall and be located 12 inches maximum from the rear wall. A rear wall grab bar at least 36 inches long must be installed behind the water closet, extending at least 12 inches from the centerline on the side wall side and 24 inches on the open side. Grab bars must be mounted between 33 and 36 inches above the finished floor and must withstand 250 pounds of force.
Why this section exists
Grab bars are the primary support mechanism for wheelchair users transferring to and from the toilet. The side bar allows the user to pull themselves from the wheelchair onto the toilet and push themselves back. The rear bar provides stability and prevents falling backward. The specific dimensions are based on ergonomic studies of wheelchair transfer techniques and ensure the bars are positioned within reach during the transfer motion.
What plan reviewers look for
Plan reviewers check the enlarged restroom plan and elevation for grab bar lengths, positions, and mounting heights. They verify the side bar extends to 54 inches from the rear wall, the rear bar extends 24 inches past the centerline on the open side, and both are between 33 and 36 inches above the floor. They also check that the wall backing can support the 250-pound structural load.
Common violations
Related requirements
ADA Section 604.5 has equivalent grab bar requirements. Section 604.2 covers the clear floor space at water closets. Section 604.4 covers toilet seat height. Section 609 covers grab bar design and installation details including diameter and clearance from the wall.