Orange, electrically non-conductive side rails, heavy gauge aluminum extrude top, thick side plates. Shoulder bolt and lock nut on top hinge; 4 solid aluminum rivets attach top to each rail. Back-up aluminum plates reinforce all top connectors. Extra heavy duty internal spreaders. Slip-resistant traction-tred steps are double riveted and knee-braced. Aluminum external rail shields help protect against abrasion damage. Rubber step bumpers to resist damage. The edge bracing system helps to decrease damage to rail. Shoe pads riveted to the edge structure. Every rivet backed up by metal part or washer to protect rails. Dimensions: Top 8-1/4" x 14-1/2", step 3" wide. Rails 3-1/8" wide, flange 1-3/16" wide.