313.9 Materials.

313.9.1 Plumber’s tape hanger iron may be used to secure pipe not greater than 2 inches (50.8 mm) in diameter.

313.9.2 Hanger iron shall be galvanized and not thinner than 22 gauge, 1/32-inch thick (0.8 mm) and 3/4-inch (19.05 mm) wide, securely nailed or screwed to the structure. When the strap-iron is formed around the pipe, it shall be secured with a 1/4-inch (6.35 mm) stove bolt.

Chapter 4 PLUMBING FIXTURES AND FIXTURE FITTINGS