A universal structural support member that includes multiple holes formed therethrough is provided to attach to multiple sized horizontal beams of a storage rack, built strong enough to support multiple pallets of goods. Pre-formed holes through the structural member and/or horizontal beam can be formed in the shape of a polygon, e.g., a square hole. A bolt to attach the structural support to the horizontal beam can be formed with a key structure to interlock with the hole and prevent rotation of the nut and/or structural member. The member can be configured with multiple holes in multiple arrangements to allow the structural support member to be used with differently sized storage racks.