Patent ID: 7571580

Claim:
Flooring comprising: a first elongate decking having a single upwardly facing channel defined by a base extending laterally between a first sidewall and a second sidewall, the channel extending longitudinally between two ends of the decking; a first flange extending laterally outward from a top of the first sidewall and a second flange extending laterally outward from a top of the second sidewall; and longitudinal stiffening ribs formed by bends in the base, first sidewall, second sidewall, first flange, and second flange; wherein: said first flange has a longitudinal edge which includes an interlocking formation mutually engaged with a complementary interlocking formation of an adjacent second said decking in a side-by-side disposition with said first decking; said second flange has a longitudinal edge which includes an interlocking formation mutually engaged with a complementary interlocking formation of an adjacent third said decking in a side-by-side disposition with said first decking; each of said first, second and third deckings are affixed at each of their ends below a top web of a girder which extends transversely to the deckings; the flooring comprises biased connecting means for engaging the flanges of said first and second adjacent and connected deckings and said first and third adjacent and connected deckings thereby to bias the first and second deckings and the first and third deckings into mutual engagement; and the flooring further comprises a concrete floor disposed on top of said side-by-side disposed first, second and third deckings and each channel of said first, second and third deckings is associated with a lining that defines a void within the concrete and thereby reduces the weight of the floor.