Shelf support

Claim 1

A SHELF SUPPORT, COMPRISING, A VERTICAL MOUNTING CHANNEL PIECE INCLUDING A WEB HAVING AT LEAST ONE HOLE AND BEING FORMED WITH INWARDLY OPPOSING FLANGES DISPOSED OPPOSITE SAID WEB AND FACING EACH OTHER ACROSS A SLOT DEFINED THEREBETWEEN, AN ELONGATED BRACING MEMBER ADAPTED TO SUPPORT A SHELF, A CROSS-PIECE MOUNTED ON SAID BRACING MEMBER AND INCLUDING A CENTRAL CONICAL STUD OPERABLE TO FIT INTO SAID HOLE IN THE WEB, SAID CROSS-PIECE AND STUD EXTENDING FROM THE BRACING MEMBER IN THE LONGITUDINAL DIRECTION THEREOF, SAID CROSS-PIECE BEING INSERTABLE INTO THE CHANNEL PIECE INTERIOR BY FIRST ALIGNING IT WITH SAID SLOT AND FITTING THE STUD INTO THE HOLE AND THEN TURNING THE CROSS-PIECE ABOUT AN AXIS SUBSTANTIALLY COINCIDING WITH SAID LONGITUDINAL DIRECTION INTO A NON-ALIGNED POSITION WHEREIN IT IS RETAINED IN THE CHANNEL PIECE INTERIOR BY SAID FLANGES, SAID BRACING MEMBER DEFINING AN APERTURE AT A POINT SPACED BELOW SAID CROSS-PIECE, AND CONNECTING MEANS COMPRISING A SUPPORT MEMBER POSITIONABLE ON SAID CHANNEL AND INCLUDING A THREADED BOLT EXTENDING THROUGH SAID APERTURE, ONE OF SAID MEMBERS HAVING A THREAD ENGAGED BY SAID BOLT, SAID BOLT BEING TURNABLE RELATIVE TO SAID THREAD THEREBY TO POSITION SAID BRACING MEMBER RELATIVE TO SAID CHANNEL PIECE, WHEREIN SAID SUPPORT MEMBER INCLUDES A U-SHAPED ABUTMENT PIECE HAVING A PORTION FITTING INTO SAID SLOT, AND SAID BOLT BEING ROTATABLY JOURNALLED RELATIVE TO SAID ABUTMENT PIECE, SAID THREAD BEING FORMED IN SAID APERTURE OF SAID BRACING MEMBER, WHEREBY TURNING OF SAID BOLT WILL RAISE AND RESPECTIVELY LOWER SAID BRACING MEMBER ANGULARLY ABOUT SAID CHANNEL PIECE.