20 gauge sheet steel and formed in an angle shape slip joint angles shall be 20 ... gauge sheet steel formed in an angle shape with a slot on one leg to form a ... provides adjustable mating with the angle filler attachment shall be by means of ... shall consist of 1 x 1 x 13 gauge angle posts punched for bolting shelves sway ... an attaching flange formed at right angles dividers are bolted to shelves padlock ... on lockers using security-type machine screws visual perforation 16 ga 18 ga ...