The process of measuring and adjusting guide rail gauge, plumb, and joint step to achieve the tolerances specified in EN 81-20 and the rail manufacturer's erection instructions.
Full Definition
Rail alignment encompasses three distinct measurements: (1) gauge — the face-to-face distance between the two car rails or counterweight rails, measured at each bracket level; (2) plumb — the vertical straightness of each rail in both planes (front-to-back and side-to-side); and (3) joint step — the step or gap at rail splice joints, limited to 0.5 mm maximum step and 1.0 mm gap per EN 81-20 and ГОСТ Р 55964. Tools used include a laser alignment frame, dial gauges, and digital inclinometers. Alignment is performed during initial installation, after building settlement, and following any structural modification to the shaft. Correct rail alignment directly affects ride quality, guide shoe wear rate, and safety gear performance. The alignment record must be documented and retained as part of the installation file.
