HUD Code 3280 and 3285(2) require 1-1/4" X .035" or larger steel strapping conforming to ASTM D3953-97- standard specifications for strapping- flat steel and seals. Type 1- Grade 1- Finish B- with a minimum total capacity of 4-725 lbs. and a working capacity of 3-150 lbs. marked every 5 ft. The straps must be provided with protections against weather deterioration and corrosion at least equivalent to that provided by a coating of zinc on steel of not less than .30 oz./ft. of surface coated. Slit or cut edges of coated strapping need not be zinc coated.