LIFTING APPARATUS FOR HEAVY FOLDING DOORS

摘要

A single, telescopic tubular steel pole is supported by an elongated steel channel base having rubber wheels on each end. The pole is leaned and supported against the top of a door opening in a building by means of a removable top frame having a longitudinal angle steel member reinforced by diagonal struts on other angle iron members which form a longitudinal channel welded to the top of the pole. A winch system employs a cable which passes around two pulleys on the top member to support a heavy steel, folding door.