Staircase jig.

摘要

The staircase jig comprises a rack (12) provided with a resting surface (14) that lies on the front edge (15) of the lip of the first step,an element (18) with a vertical projection (19) for engaging the adjacent upper riser (4) and a rest (22) for engaging the underside of the lip of the next upper step together with a regulable stop (23) for the front of the lip of the next upper step. Two such racks (12) can be provided, joined by a telescoping longitudinal bar (13). The purpose of the jig is to ensure that each tread and riser combination has the same depth of tread, height of riser and lip projection. <IMAGE>