Type A Roof Deck with Stiffening Rib
A DECK WITH STIFFENING RIB(NARROW RIB)
STEEL ROOF DECKING DIMENSIONS & INFO
Type A roof deck is the “original” term for this deck profile, though recently the Steel Deck Institute has promoted the more descriptive name, “Narrow Rib Roof Deck”, or “Type NR”.
Type A roof deck with stiffening rib is most readily available with material thicknesses defined by the even gauges 20 and 22 These correspond to design thicknesses of 0.0359” and 0.0299″ respectively.
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