This guide explains how to make 90° bends, vertical bends, tees, and offsets in wire mesh cable trays safely and professionally. Horizontal 90° Bend (Flat Bend) 2. Cross Bend (4-Way. This video shows you how easy it is to form and bend an open cable tray from SILTEC - suitable for cables and pipes. For more details and info, visit www. Unlike perforated trays, bends can be created directly at site without expensive fittings. Since the jaws of the bolt cutter drags a layer of zinc across the cut end and forms a protective layer. Construction of a flat 90° bend (A) The amount of tray lip to be removed is equal to 2, 3/4 the width of the tray, half of this measurement will be removed on either side of the centre line.