Bathroom Planning Guideline 11—Shower/Tub Control Valves
Code Requirement:
Shower and tub/shower control valves must be one of the following:

• pressure balanced
• thermostatic mixing
• combination pressure balance/thermostatic mixing valve types

Bathroom Planning Guideline 12—Shower Seat
Recommended: Plan a seat within the shower that is 17-19 inches above the shower floor and 15 inches deep.
Code Requirement:

• Shower seat must not infringe on the minimum interior size of the shower (900 square inches).

Bathroom Planning Guideline 13—Tub/Shower Surround
Recommended: The wall area above a tub or shower pan should be covered in a waterproof material extending at least 3 inches above the showerhead rough-in.

Bathroom Planning Guideline 14—Grab Bars
Recommended: Plan grab bars to facilitate access to and maneuvering within the tub and shower areas.

Tub and shower walls should be prepared (reinforced) at time of construction to allow for installation of grab bars to support a static load of 300 pounds.

Grab bars should be placed at least 33-36 inches above the floor.

Grab bars must be 1¼ to 1½ inches in diameter and extend 1½ inches from the wall.
 
Bathroom Planning Guideline 15—Glazing
Code Requirement:

• Glass used in tub or shower enclosures (i.e. tub or shower door) or partitions must be tempered or an approved equal and must be permanently marked as such.
• If the tub or shower surround has glass windows or walls, the glazing must be tempered glass or approved equal when the bottom edge of glazing is less than 60 inches above any standing or walking surface.
• Any glazing (i.e. windows or doors) whose bottom edge is less than 18 inches above the floor must be tempered glass or approved equal.