Metal roof decking is a structural metal decking that's not designed to have concrete poured on top of it. It's a smooth panel without embossments. The two main types of roof decking are B Deck and N Deck.
It's a non-composite structural metal decking that functions as the structural substrate during roof construction. Roof deck is installed on top of the steel beams or joists. Rigid board insulation is applied to the top of the decking and a built up roof is installed over the insulation.
Metal roof deck can also be used for canopies, gates, fences, mezzanines, metal siding, and platform seating in movie theatres.