SUPAW – SUPAW accessory to lay wood decking on wooden joistsSUPAW SUPAW accessory to lay wood decking on wooden joists The Uptec SUPAW accessory is ideal for laying wood on a wooden joist. The special slots located along the flap allow rapid fixing to the joist with standard screws. The hooks located under the base of the flap allow easy attachment to the pedestal and possible removal from it. This accessory is to be used in combination with SUPAL and SUPAS pedestals.