Space decks

Claim 1

A SPACE DECK OF THE GRID TYPE HAVING MAIN JOISTS AND CROSS JOISTS MOUNTED IN MUTUALLY PERPENDICULAR PLANES, FOR USE IN THE CONSTRUCTION OF BUILDINGS AND LIKE STRUCTURES COMPRISING A RIGID LATTICE FRAMEWORK, SAID FRAMEWORK INCLUDING A PLURALITY OF LOWER SINGLE CHORD OPEN-WEB MAIN JOISTS ARRANGED IN PARALLEL SPACED RELATION AND HAVING THEIR OPEN-WEBS EXTENDING UPWARDLY FROM SAID LOWER SINGLE CHORDS, THE OPEN-WEBS OF SAID LOWER SINGLE CHORD JOISTS COMPRISING CONTINUOUS UNDULATING WEB BARS FORMING ALTERNATE UPPER AND LOWER PORTIONS, A PLURALITY OF CROSS JOISTS ARRANGED IN SPACED RELATION AND EXTENDING TRANSVERSELY ACROSS SAID LOWER SINGLE CHORD MAIN JOISTS TO THEREWITH FORM SAID LATTICE FRAMEWORK, SAID CROSS JOISTS POSITIONED WITHIN SAID LOWER PORTIONS OF SAID LOWER WEB BARS, AND A PLURALITY OF UPPER SINGLE CHORD OPEN-WEB MAIN JOISTS ARRANGED IN PARALLEL SPACED RELATION AND EXTENDING TRANSVERSELY ACROSS SAID PLURALITY OF CROSS JOISTS AND VERTICALLY ALIGNED OVER SAID PLURALITY OF LOWER SINGLE CHORD MAIN JOISTS, THE OPEN-WEBS OF SAID UPPER SINGLE CHORD MAIN JOISTS EXTENDING DOWNWARDLY FROM SAID UPPER SINGLE CHORDS AND COMPRISING CONTINUOUS UNDULATING WEB BARS FORMING ALTERNATE UPPER AND LOWER PORTIONS, SAID UPPER PORTIONS OF SAID UPPER WEB BARS POSITIONED OVER SAID LOWER PORTIONS OF SAID LOWER WEB BARS WITH SAID CROSS JOISTS PASSING THEREBETWEEN, SAID LOWER AND UPPER SINGLE CHORD MAIN JOISTS AND SAID CROSS JOISTS BEING FASTENED TOGETHER TO FORM SAID RIGID FRAMEWORK.