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minimum and 30 inches maximum R325.8.3.1 Fixed position grab bars. Fixed position grab bars shall be a minimum of 36 inches in length and start 12 inches from the rear w all. R325.8.3.2 Swing-upgrab bars.Swing-up grab bars shall be a minimum of 28 inches in length fromthe rear wall. R325.8.4 Grab bars at bathtubs. Horizontal and vertical grab bars shall meet the requirements of R325.8. R325.8.4.4 Vertical grab bars. Vertical grab bars shall be a minimum of 18 inches long and installed at the control end wall and head end wall. Grab bars shall mount within 4 inches of the exterior of the bath tub edge or within 4 inches w ithinthe bath tub. The bottom end of the bar shall start between 36 inches and 42 inches above floor grade. EXCEPTION: The required vertical grab barcan be substitutedwith a floorto ceiling grab bar meeting the requirements of R325.8 at the control end and head end entry points. R325.8.4.2 Horizontal grab bars. Horizontal grab bars shall be provided at the control end, head end, and the back wall within the bathtub area. Grab bars shall be mounted between 33 inches and 36 inches above floor grade. Control end and head end grab bars shall be 24 inches minimum in length. Back wallgrab bar shall be 36 inches minimum in length. R325.8.5 Grab bars at showerstalls. Where showerstalls are provided to meet the requirements for bathing facilities, grab bars shall meet the requirements of R325.8. EXCEPTION: Shower stallswith permanent built-in seatsare not required to have vertical or horizontal grab bars at the seat end wall. Avertical floor to ceiling grab bar shall be installed within 4 inches of the exterior of the shower aligned with the nose of the built-in seat. R325.8.5.1 Vertical grab bars. Vertical grab bars shall be 18 inches minimum in length and installed at the control end w all and head end wall. Vertical bars shall be mounted w ithin 4 inches of the exterior of the shower stall or within 4 inches inside the show er stall. The bottom end of vertical bars mount between 36 inches and 42 inches above floor grade. R325.8.5.2 Horizontal grab bars. Horizontal grab bars shall be installed on all sides of the shower stall mounted between 33 inches and 36 inches above the floor grade. Horizontal grab bars shall be a maximum of 6 inches from adjacent walls. Horizontal grab bars shall not interfere w ith shower control valves. R325.9 Ram ps. All interior and exterior ramps, w hen provided, shall be constructed in accordance with Section R311.8 w ith a maximum slope of 1 vertical to 12 horizontal. The exception to R311.8.1 is not allowed foradult family homes. Handrails shall be installed in accordance with R325.9.1. R325.9.1 Handrails for ramps. Handrails shall be installed on both sides of ramps between the slope of 1 vertical to 12 horizontal and 1 vertical and 20 horizontal in accordance w ith R311.8.3.1 through R311.8.3.3. R325.10 Stair treads and risers. Stair treads and risers shall be constructed in accordance w ith R311.7.5. Handrails shall be installed in accordance w ith R325.10.1. R325.10.1 Handrails for treads and risers. Handrails shall be installed on both sides of treads and risers numbering from one riser to multiple risers. Handrails shall be installed in accordance w ith R311.7.8.1 through R311.7.8.4 R325.11 Shower stalls. Where provided to meet the requirements for bathing facilities, the minimum size of shower stalls for an adult family home shall be 30 inches deep by 48 inches long. [Statutory Authority: RCW 19,27,031 and chapters 19.27 and 34.05 RCW.13-04-068, § 51-51-0325, fi led 2/ 1 /13, effective 711113. Statutory Authority: Chapter 19.27 RCW. 10-18-036, § 51-51-0325, filed8/25110, effective9/25/10. Statutory Authority: RCW 19.27.190, 19,27.020, and chapters 19.27 and 34.05 RCW. 09-04-023, § 51-51-0325, filed 1 /27109, effective 711 MO.Statutory Authority: RCW 19.27, 074, 19.27.020, and chapters 19.27 and 34.05 RCW. 07-01-090, § 51-51-0325, filed 12/19/06, effective 7/1/07. StatutoryAuthority: RCW 19.27.031 and 19.27.074.04- 01-109, § 51-51-0325, filed 12117/03, effective 7/1104.] Effective: 2013 July 01 Updated: 2017 February