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R330.8.3.1 Fixed position grab bars.Fixed position grab bars shall be a minimum of 36 inches in length and start 12 inches from the rear wall. R330.8.3.2 Swing-up grab bars.Swing-up grab bars shall be a minimum of 28 inches in length from the rear wall. R330.8.4 Grab bars at bathtubs. Horizontal and vertical grab bars shall meet the requirements of R330.8. R330.8.4.1 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 within the bath tub.The bottom end of the bar shall start between 36 inches and 42 inches above floor grade. EXCEPTION: The required vertical grab bar can be substituted with a floor to ceiling grab bar meeting the requirements of R330.8 at the control end and head end entry points. R330.8.4.2 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 wall grab bar shall be 36 inches minimum in length. R330.8.5 Grab bars at shower stalls.Where shower stalls are provided to meet the requirements for bathing facilities,grab bars shall meet the requirements of R330.8. EXCEPTION: Shower stalls with permanent built-in seats are not required to have vertical or horizontal grab bars at the seat end wall.A vertical 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. R330.8.5.1 Vertical grab bars.Vertical grab bars shall be 18 inches minimum in length and installed at the control end wall and head end wall.Vertical bars shall be mounted within 4 inches of the exterior of the shower stall or within 4 inches inside the shower stall.The bottom end of vertical bars mount between 36 inches and 42 inches above floor grade. R330.8.5.2 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 with shower control valves. R330.9 Ramps.All interior and exterior ramps,when provided,shall be constructed in accordance with Section R311.8 with a maximum slope of 1 vertical to 12 horizontal.The exception to R311.8.1 is not allowed for adult family homes.Handrails shall be installed in accordance with R330.9.1. R330.9.1 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 with R311.8.3.1 through R311.8.3.3. R330.10 Stair treads and risers.Stair treads and risers shall be constructed in accordance with R311.7.5.Handrails shall be installed in accordance with R330.10.1. R330.10.1 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 with R311.7.8.1 through R311.7.8.4 R330.11 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,filed 2/1/13,effective 7/MI Statutory Authority:Chapter 19.27 RCW. 10-18-036,§51-51-0325,filed 8/25/10,effective 9/25110.Statutory Authority:RCW 19,27.190,19.27.020,and chapters 19.27 and 34,05 RCW.09-04-023,§51-51-0325,filed 1127109,effective 7/1I10.Statutory Authority:RCW 79.27.074,i9.27 020,and chapters 19.27 and 34.05 RCW.07-01-090,§51-51-0325,filed 12119/06.effective 7/1/07.Statutory Authority:RCW 19.27.031 and 19.27.074.04- 01-109,§51-51-0325,fled 12/17103,effective 7/1/04.1[Statutory Authority:RCW 19,27.031 and 19,27.074.WSR 20-03- 223,§51-51-0330,filed 116120,effective 7/1/20.1 E E i I Implementation Date: 2021 February 01 Updated:2021 February i