Bracket Material: ASTM A36, Made of three different thickness of plates.Cap Plate: ASTM A572 Grade 50.Bracket Hardware: (2)-3/4”X16”Long Grade B7 All thread Rod with Nuts.All welding to be in accordance with AWS D1.1.Brackets and Caps are all available as either plain steel or Hot-dipped galvanized in accordance with ASTM A153.Bracket Hardware is provided as Electro-zinc plated in accordance with ASTM B633.