The side rails, rungs and cage straps are manufactured from pultruded fibreglass reinforced components which can be found in Treadwell’s RailEX® componentry. The side rails are either 50mm round or square tube with a wall thickness of 4mm or greater. The rungs shall be pultruded 32mm across the FRP fluted tube.

Cage hoops are constructed by the open mould hand layup process with a width of 76mm and thickness of 6mm minimum at the top and bottom and 50mm x 6mm at the intermediate hoops. The cage shall be interconnected with 50mm x 4.8mm pultruded straps spaced 230mm on centre around the hoop.