Features Constructed of 5052H32 Aluminum rails 19″ EIA-310-D compliant 12-24 double-tapped rails Numbered rail markings Side ganging and accessory mounting holes Knockdown self-squaring design ships disassembled for easy handling and shipping protection Load rated to 1,500 lbs (680 kg) of equipment load capacity 30-pack of 12-24 mounting hardware included