Nonwelded metal grating

Claim 1

A metal grating comprising a plurality of parallel horizontal beams provided with laterally projecting flanges, each beam having a plurality of longitudinally spaced vertical slots extending transversely therethrough, the lower wall of each slot being formed by the top of the free end portion of a tongue struck out of the beam, parallel cross bars of greater height than said slots extending through the slots and resting on the tongues and having notches extending downwardly from the tops of the bars receiving the portions of said beams above said slots with said portions substantially engaging the bottoms of the notches, the height of said tongues being great enough to permit the bars during assembly to be inserted in said slots while the tongues are bent laterally out of the beams, whereupon the bars can be raised in the slots and the tongues bent back beneath the bars to support them, pans resting on said beam flanges and spanning the spaces between the beams, and concrete resting on said pans and filling all of the space between said beams and bars to embed them in the concrete with the top of the concrete substantially flush with the tops of the beams.