Cold Spring Enterprises stocks and sells metal decking.
Metal decking (a.k.a. concrete decking, form deck, or pan decking) is commonly used in construction when pouring a concrete porch floor. The decking is suspended around the perimeter (and possibly more depending on the span) then filled with concrete. The metal decking covers 3′ in width and is 24′ long, but we will cut to any length needed or it can easily be field-cut with a saw. It is 22ga. painted metal with 1 1/2″ ribs. See below for a cross-section drawing and span chart.