When bolting the sections of elevator together be sure the upper trough ends overlap the upper trough ahead, and each lower trough is underneath the trough ahead, so the chains will slide smoothly. Bolt the short tie plates to the underside of troughs at the embossed holes in the middle of trough. When bolting on the head section, have the end of scroll sheet underneath the upper trough section. The lower cross plate in the head section must bolt on top of the return trough.