Pallet rack

Claim 1

A METAL STORAGE RACK COMPRISING A PLURALITY OF PAIRS OF SPACED END UNITS EACH INCLUDING A PAIR OF SPACED VERTICAL POSTS, A PAIR OF SPACED HORIZONTAL SHELF BEAMS MOUNTED BETWEEN CORRESPONDING POSTS OF SAID UNITS, SAID BEAMS HAVING A VERTICAL MEMBER AND AN UPPER HORIZONTAL MEMBER EXTENDING FROM THE UPPER EDGE OF SAID VERTICAL MEMBER, A PLURALITY OF CORBELS PRESSED OUTWARDLY FROM SAID VERTICAL SURFACE IN A DIRECTION OPPOSITE FROM SAID HORIZONTAL MEMBER, EACH SAID CORBEL HAVING A VERTICAL PORTION PARALLEL TO BUT SPACED FROM SAID VERTICAL MEMBER AND JOINED AT EACH END TO SAID VERTICAL MEMBER BY SLOPING PORTIONS, SAID CORBEL DEFINING AN OPEN VERTICAL SLOT, THE UPPER SURFACE OF SAID CORBEL BEING SPACED BELOW SAID HORIZONTAL BEAM MEMBER, THE PORTION OF THE BEAM FROM WHICH EACH CORBEL IS PRESSED DEFINING AN APERTURE AFFORDING ACCESS TO THE CORBEL THROUGH THE BEAM, TIE RODS EXTENDING DIAGONALLY OF SAID RACK BETWEEN OPPOSITE ENDS OF SAID SPACED BEAMS, AND A TIGHTENING MEMBER ON EACH END OF THE TIE RODS ADJUSTABLY SECURING SAID TIE RODS TO OPPOSED SLOPING PORTIONS OF CORBELS ADJACENT THE RESPECTIVE ENDS OF SAID BEAMS, SAID MEMBERS BEING ACCESSIBLE FOR ADJUSTMENT THROUGH SAID ACCESS APERTURES IN THE BEAMS.