Aluminum U-Channel 6063 Aluminum 6063 T52 U-Channel U-Channel Profile Type Architectural 8 ft Overall Length Length Tolerance +/-1.000 in 2 in Outside Leg Length Outside Leg Length Tolerance +/-0.024 in 4 9/16 in Inside Base Width Inside Base Width Tolerance +/-0.034 in 1.25 in Inside Height Leg Thickness 0.188 in Leg Thickness Tolerance +/-0.007 in Leg Inside Corner Shape Square Heat Treatment Tempered Heat Treatable Yes Mechanical Finish Mill Yield Strength 21 000 psi