Slotted floor slab for the two-stage construction of level concrete plates

A monolithic floor structure having a plurality of floor slabs and a poured concrete deck over said floor slabs, each of said floor slabs comprising:

• a thin rectangular concrete body,
• said rectangular body having an upper face, a lower face, and side walls,
• end walls engaged between said upper face and said lower face,
• a plurality of more than two parallel longitudinal tubular passages passing through a full length of said body and opening on said end walls,
• a periphery of each of said plurality of more than two parallel longitudinal tubular passages spaced internally from said upper face, said lower face said side walls over said full length of said body,
• said passages located below said upper face of said body,
• each of at least two passages of said plurality of longitudinal tubular passages having a plurality of slots communicating with said upper face of said body, and
• each of said plurality of slots being spaced apart from said end walls and each other over a length of said body,
• the remainder of said plurality of parallel longitudinal tubular passages extending said full length of said body without communicating with said upper face of said body,
• wherein said poured concrete deck of said monolithic structure is bonded to said plurality of said slabs when a selected amount of concrete is poured on said plurality of said slabs through said plurality of slots into an entire length of each of said at least two of said plurality of more than two parallel longitudinal tubular passages and over said upper face of each of said plurality of said slabs.