Our standard grid pipe is 1.5" Schedule 80 Aluminum Pipe. It is available in Black Anodized Finish. Our pipe is made of 6061-T6 Aluminum alloy has a minimum yield strength of 37,000 pounds and a minimum ultimate tensile strength of 40,000 pounds per square inch. Aluminum pipe is approximately one third the weight of steel pipe, greatly reducing the structural load on your building.