The allowable load tables for common slab conditions may be found in SDI’s FDDM (Floor deck Design Manual) and can be purchased on this website.  The allowable load may also be found on the Deck Manufacturer’s catalogs. For composite floor deck, the load is often shown as a “Superimposed” load which is the allowable load of the hardened concrete slab on metal deck. For roof deck, the load is given for the bare metal deck. For form deck, both conditions may be shown.  LRFD, ASD or LSD methodology may be used in these tables.