derrick crane การใช้

• Further construction then proceeded in cantilever in smaller sections, using derrick cranes stationed on the deck level.
• The assembly of the steel-frame was subcontracted to Dawnay Ltd . and was built using several Scotch derrick cranes.
• It also had a small goods yard with a facilities for coal, timber and general freight, the station being home to a wooden derrick crane.
• In 1973 a timber shed still existed around the boiler, along with a small shed over the Walkers steam winch, and the derrick crane was still extant.
• About 7.6 m south-west of the boiler, to the west of the blowdown tank, is a Walkers Ltd ( Maryborough ) steam winch, which was used to power a stiff leg derrick crane for moving logs.
• A photograph from shows that the surviving equipment was already in place : the Marshall steam engine and boiler were under separate open-sided sheds, the boiler's brickwork was painted white, and the Walkers steam winch was operating a stiff leg derrick crane.
• Its design took advantage of the development of the overhead traveling bridge crane, which could be used to move heavy granite blocks within a rectangular facility . ( The previous horseshoe-shaped facility was serviced by a centrally-placed derrick crane with a boom, which moved the blocks from arriving railroad cars to areas of the building within range of the boom . ) The building continued to be used for granite processing ( after 1976 by a succession of different owners ) until 2009 . It now houses ReSOURCE, a local non-profit that repurposes donated building materials and provides job training and other programs.