Roofing systems with supporting strap assemblies

Claim 1

A ROOF STRUCTURE, COMPRISING: (A) A PLURALITY OF PURLINS SPACED APART FROM EACH OTHER; (B) A PLURALITY OF BEAMS TRANSVERSELY SPANNING SAID PURLINS TO FORM POINTS OF INTERSECTION, SAID BEAMS SPACED APART PREDETERMINED DISTANCES ALONG SAID PURLINS; (C) MOUNTING MEANS SECURING SAID BEAMS TO SAID PURLINS, SAID MOUNTING MEANS PERMITTING SAID BEAMS TO MOVE RELATIVE TO SAID PURLINS AT CERTAIN OF SAID POINTS OF INTERSECTION; (D) A PLURALITY OF PANS BEING GENERALLY CURVILINEAR IN CONFIGURATION, SAID PANS TERMINATING IN LOCKING FLANGES; (E) MEANS SECURING SAID LOCKING FLANGES OF SAID PANS TO SELECTED ADJACENT BEAMS OF SAID PLURALITY OF BEAMS; (F) AT LEAST ONE CAP BEING GENERALLY FLAT IN CONFIGURATION AND SUSPENDED BETWEEN AND ATTACHED TO TWO ADJACENT BEAMS OF SAID PLURALITY OF BEAMS WHILE COVERING SAID LOCKING FLANGES OF SAID PANS WHICH ARE SECURED TO SAID TWO ADJACENT BEAMS; AND (G) CURVILINEAR STRIP ASSEMBLIES ATTACHED TO SELECTED ADJACENT BEAMS BELOW SAID LOCKING FLANGES OF SAID PANS ATTACHED THERETO, SAID STRAP ASSEMBLIES BEING SUSPENDED BETWEEN SAID ADJACENT BEAMS AND ALSO LOCATED BELOW SAID PANS AND SPACED THEREFROM PREDETERMINED DISTANCES SUCH THAT SAID STRAP ASSEMBLIES PROVIDE A BED FOR SUPPORTING SAID PANS INTERMEDIATE SAID SELECTED ADJACENT BEAMS DURING THERMAL EXPANSION.