CRL-U.S. Aluminum’s Corner-Loc technology ensures proper alignment of top and bottom rails with vertical stiles and exact positioning of shear block fasteners. Corner-Loc technology comes standard on all CRL-U.S. Aluminum narrow, medium, and wide stile doors in thermal and non-thermal configurations. Key components of standard door rail-to-stile corner construction were reengineered to minimize the damaging effects of forceful impacts and repetitive torquing action of automatic door operators.
