Beef up the structural integrity of your 6 ft. x 5 ft. or 8 ft. x 6 ft. Arrow storage shed with this roof strengthening kit. The hot-dipped galvanized steel support beams offer extra strength for storage buildings in colder climates where snow and ice may accumulate. Increase your roof's load-bearing capacity by 50% with this easy-to-install rafter kit. Color: Grays.