Construction : a journal for the architectural engineering and contracting interests of Canada (1913)
Macdonald, Ivan S, McLean, Robert Craik, Reed, Frederick, Keith, Fraser Sanderson, 1878-, Toutloff, M. B · Toronto : Consolidated Press · leaf 485
ed from the flat cars the twobooms are gradually brought in, always maintainingthe balance until the load is centred over the trackin front of the derrick car, when it is carried alongthe line to some desired spot where the load can beboomed out and lowered out of the way. The.onger girders are… … Nil. I. — FAS;]:\i^ • KI.K TO LIFT TIIK ! 1 i until it IS centred over the track in front of the derrick.Then the derrick is backed up and the rear end ofthe girder swung over, after which the derrick isbrought forward and both booms hooked to thecentre of the girder by means of a balance beam tobe…
Building · Architecture
Internet Archive · Thomas Fisher Rare Book Library · Public Domain Mark 1.0. Free to use for anything.
