Elevator guide rail
 An elevator guide rail includes a central portion and a pair of lateral portions. The central portion has a U-shaped cross section and the lateral portions have an L-shaped cross section. The lateral portions are installed on both sides of central portion. The two flanges of the central portion include shaped edge sections. The lateral portions are received within edge sections. 
Otis Elevator Company
B
B66B
inventional
Kazuhiko Hideki
Motomura Ito