Roof structure

Claim 1

A ROOF STRUCTURE COMPRISING RAFTERS EACH HAVING AN UPPER SURFACE PROVIDED WITH LONGITUDINAL EXTENDING ELASTIC PACKING STRIPS AND A DOWNWARDLY FACING LONGITUDINAL CHANNEL, PREFABRICATED PLATE-SHAPED ROOF ELEMENTS SUPPORTED BY SAID RAFTERS AND DISPOSED IN EDGE-OPPOSED RELATIONSHIP WITH EDGE PORTIONS OF SAID ROOF ELEMENTS DISPOSED OVER SAID RAFTERS AND RESTING ON SAID PACKING STRIPS, RIGID TIGHTENING STRIPS DISPOSED PARALLEL TO SAID RAFTERS AND OVERLYING SAID EDGE PORTIONS OF SAID ROOF ELEMENTS, SPACED CLAMPING BOLTS EXTENDING DOWNWARDLY FROM SAID TIGHTENING STRIPS AND THROUGH HOLES IN SAID RAFTERS OPENINGS INTO SAID CHANNELS, SAID BOLTS HAVING SHANK PORTIONS PASSING BETWEEN THE EDGE PORTIONS OF SAID ROOF ELEMENTS AND HAVING HEADS DISPOSED IN SAID CHANNEL AND PROVIDING SHOULDERS, AND A CLAMPING STRIP RECEIVED IN SAID CHANNLE OF EACH RAFTER AND EXTENDING SUBSTANTIALLY THROUGHOUT THE LENGTH OF THE RAFTER, EACH CLAMPING STRIP HAVING ELONGATED KEY-HOLE SHAPED HOLES WITH A ENLARGED PORTION AT ONE END OF EACH HOLE TO RECEIVE THE HEAD OF THE RESPECTIVE BOLT AND AN ELONGATED NARROWER PORTION RECEIVING THE SHANK PORTION OF SAID BOLT AND CAM PORTIONS OF GRADUALLY INCREASING HEIGHT BORDERING SAID ELONNGATED NARROWER PORTION OF THE HOLE AND ENGAGEABLE WITH SAID SHOULDER PROVIDED BY THE BOLT HEAD, EACH CLAMPING STRIP BEING MOVABLE LONGITUDINALLY IN SAID CHANNEL FROM A POSITION IN WHICH SAID ENLARGED PORTIONS OF THE HOLES IN SAID STRIP REGISTER WITH SAID HOLES IN THE RESPECTIVE RAFTER TO RECEIVE THE HEADS OF SAID BOLTS TO A CLAMPING POSITION IN WHICH CAM PORTIONS OF THE CLAMPING STRIP ENGAGE AND SHOULDERS OF SAID BOLTS HEAD AND PROGRESSIVELY DRAW SAID BOLTS AND TIGHTENING STRIP DOWNWARDLY TO CLAMP SAID ROOF ELEMENTS BETWEEN SAID TIGHTENING STRIP AND REAFTER.