Interlocking concrete decking

Claim 1

A CONCRETE DECKING CONSTRUCTION COMPRISING A PLURALITY OF MONOLITHIC, PRECAST AND PRESTRESSED REINFORCED CONCRETE CHANNEL MEMBERS, EACH MEMBER INCLUDING AN ELONGATED WEB WITH MARGINAL SIDE WALLS, SAID MEMBERS BEING DISPOSED IN UPPER AND LOWER SETS OF LATERLALY SPACED MEMBERS, THE MEMBERS OF THE UPPER SET STAGGERED AND INVERTED AND IN OVERLYING RELATION TO THOSE OF THE LOWER SET, THE SIDE WALLS OF EACH UPPER SET MEMBER EMBRACINGLY ENGAGING IN SIDE-BY-SIDE RELATION THE ADJACENT SIDE WALLS OF A PAIR OF ADJACENT LOWER SET MEMBERS THEREBY PROVIDING A CONTINUOUS DECKING, THE SIDE WALLS OF EACH UPPER SET MEMBER HAVING A BASE PORTION RESTING UPON THE ELONGATED WEBS OF TWO ADJACENT LOWER SETS MEMBERS AND THE SIDE WALLS OF THE LOWER SET BEING OF LESS HEIGHT THAN THOSE OF THE UPPER SET WHEREBY THE ENTIRE WEIGHT OF THE UPPER SET MEMBERS WILL BE DIRECTLY CARRIED BY THE WEBS OF THE LOWER SET MEMBERS, A LAYER OF LIGHTWEIGHT THERMALLY INSULATING CEMENT BONDED TO THE FACE OF EACH WEB BETWEEN ITS SIDE WALLS, SAID LAYER TERMINATING IN SPACE RELATION TO SAID SIDE WALLS AND PROVIDING SPACES THEREBETWEEN RECEIVING THE SIDE WALLS OF THE ASSOCIATE CHANNEL MEMBERS OF THE OTHER SET, SAID LAYER RETAINING SAID ENGAGING SIDE WALLS AGAINSG LATERAL DISPLACEMENT.