221 Main Street

Location: San Francisco, CA
Completion Date: 2010
Basic Equipment List: Rail Track, Davit Carriages, and Platform

221 Main St. is a 16 story office building located in San Francisco.  The building was constructed with a track system that had outlived its usefulness.  Sky Rider was chosen to replace the entire system including rail track, davit carriages and platform.  The rail track follows the contour of the building face including three inside corners.  The facade has several spans necessitating numerous platform lengths.  Consequently, a modular platform along with independent davit carriages was utilized.  The davit carriages were linked electrically to allow use of the various platform lengths and to allow the platform to swing easily between inboard and outboard positions.