Drop-in Couplings Drop-in couplings allow stage and riser sections to be joined together at the same level when set up as a stage, or to be joined at different levels when set up in a riser arrangement.
		Heavy Duty Construction Stage and riser decks are constructed with solid plywood, laminated with tempered hardboard on top and bottom. Decks are surrounded and supported by 16" gauge formed steel channels for maximum carrying capacity.