engineered and installed a unique winch to replace 49 mast sections on an Alimak Scando car hoist at Graincorp Gladstone.
Graincorp operates seven bulk grain export elevators in Eastern Australia, boasting a combined grain storage capacity of 20 million tonnes. Graincorp’s Gladstone facility makes use of an Alimak Scando 10/19 car hoist to access the seven landings of their 70m high grain stack for necessary servicing and maintenance. The lift also enables swift and safe access for emergency response if required.
Following an on-site service inspection, Alimak Hek identified irreparable corrosive damage on the base mast, base frame and a mast section located 25m up the grain stack. Both sections were damaged beyond repair and required the entire 70m mast and base frame to be dismantled and replaced.
Given the close proximity of power lines to the grain stack, Alimak Hek was unable to angle a crane close enough to dismantle the Scando’s mast. A temporary disconnection of the lines would result in a shutdown of Graincorp’s entire Queensland rail system.
Alimak Hek engineered and installed a unique winch, which would allow the mast to be dismantled and reassembled manually. Fixed to the Scando car hoist, the Alimak winch was able to hook each mast section individually and angle the section onto the hoist car roof area, from where it was delivered to the ground.
Alimak Hek employed this system to manually dismantle each of the 49 mast sections of the Gladstone grain stack, with the same process used in reverse to assemble the replacement mast.
The Alimak Scando 10/19’s replacement mast has been in operation at the Gladstone facility since May 2012, providing Graincorp operators with safe access to the seven levels of the grain stack.