The lift operation on the roof of the petrol station in Mannheim was carried out by a 300t GMK6300 with a 220t GMK6220-L and a 130t GMK5130-1 acting as support cranes.
The roof structure consisted of a 45m-long central section with two semi circles either side with a 40m radius. Such were the space issues on site, with just 6m of space between the roof’s 8m-tall supporting columns and the rear wall of the property, that when the GMK6300 was in position there was just 10cm of space between it and the rear wall.
Gräser Autokrane, which oversaw the lift, said it chose the three Grove cranes as it meant it was able to utilise Manitowoc’s Compu-Crane lift planning software to help manage the lift.
“Normally these lifts are everyday jobs but the dimensions of the roof were unlike any other gas station,” said Gräser Autokrane’s project manager Thomas Meier. “Plus, with the confined space we needed precise positioning and movement. Our 300t crane could handle the lift alone but to prevent tilting, and for added lift safety, we sent another two all terrain cranes to the job.
“We knew how confined the space was, so positioning was paramount. But the software enabled us to position all three cranes precisely and to simulate the lift before actually doing it on site.”
