Use of Gantry and Spider Cranes

Our team delivering the extension and refurbishment of office space at 55 Douglas Street in Glasgow City Centre, used a unique gantry and spider crane system to aid the erection of the steel to facilitate the extension to the front of the eight buildings.

This method was chosen to avoid the need to place a crane on a public road within Glasgow City Centre to prevent restrictions to the cycle lane, road and pavement, as there was another construction site operating on the other side of the street.

In order to get this underway, our team worked over the weekend to set up a gantry on top of each of the towers to allow a spider crane to be placed on top of the gantries. The spider crane then allowed the new steel work to be placed in to position for the new extension.

This original design for the gantries involved input from the project site team, our appointed subcontractors and two independent structural engineers to ensure the operation was feasible and could be carried out safely.

The gantries comprise of square steel frames assembled at floor level with handrails which were then lifted onto steel columns already positioned on the roof.

By placing the crane on the roof for the duration of the works and completing this operation overnight, we ensured minimal inconvenience to road users, cyclists and members of the public.

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Entry submitted by Clark Contracts

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