Cranes key to underground car park construction
First published in World Highways
A new parking facility in Minnesota has benefited from the use of two Manitowoc cranes
A Manitowoc 2250 crawler crane and a Grove GMK6250L all-terrain crane have been used to help construct a two-story underground parking structure at a mixed-use apartment complex at Minnesota in the US.
The cranes were rented from Vic’s Crane and Heavy Haul by Hanson Structural Precast, the precast subcontractor working for general contractor Frana Companies. The two cranes lifted and placed the precast concrete wall panels and flooring sections. The heaviest load, an 18m double T floor section, weighed 29.5tonnes. The load-bearing walls each weighed 10.75tonnes. Vic’s Crane and Heavy Haul first used the GMK6250L all-terrain crane to place the precast wall sections. The sections were taken directly from the trucks and placed into position as load-bearing walls. With the perimeter walls complete, the Manitowoc 2250 crawler crane was used to place the heavier flooring slabs and the interior walls. To ensure the trucks could access the jobsite while keeping the crane on steady ground, the 2250 was assembled with Series 3 counterweights and 64m of main boom. Both cranes remained on the jobsite for one month.