Italy

Alimak construction hoists at the world’s longest three-tower, cable stayed bridge

Queensferry Crossing, Edinburgh — Fife, Scotland, UK

Six Alimak Scando 650 hoists were used in the construction of the Queensferry Crossing. The bridge, which is 1.7 miles (2.7 km) long and due to open in May 2017, is the world’s longest three-tower, cable stayed bridge and is located between Edinburgh and Fife, Scotland.

Alimak Hek have provided construction access to the three concrete pylons of the new suspension bridge. Our installation works are still continuing and have been progressing during both the concrete construction and cable stay (suspension wire) installation.

Alimak Hek provided three Alimak Scando 650 FC hoists with car size 1.5 m x 3.2 m and speed 54 m/min, and three Alimak Scando 650 DOL hoists with car size 1.5 m x 3.2 m and speed 38 m/min. Each machine has been specially modified to allow a side entrance (this allows passengers to exit from the hoist car on the same side as the mast tower) onto the moving concrete formwork. Alimak Hek also designed and supplied tie installation platforms on each hoist, proving a safer working environment for the installation of ties.

Two hoists were installed on each pylon, one Alimak Scando 650 DOL serving sea level to road level and one Alimak Scando 650 FC serving road level to the top of the pylon. The pylons are over 200 meters tall.

Some of the challenges Alimak Hek overcame were designing and installing the suspended platform, on which each hoist was mounted. Alimak Hek also had to design a bespoke rolling tie to interface between the hoist and the moving concrete formwork, taking into account all the structural forces and loads of operating this equipment in extreme environments.

Construction hoist details

Location:
Queensferry Crossing, Edinburgh – Fife, Scotland
Application:
Bridge construction
Hoist types:
3 x ALIMAK SCANDO 650 FC
.
3 x ALIMAK SCANDO 650 DOL
Capacity/hoist:
2,000 kg
Hoist car sizes (W x L x H):
1.5 m x 3.2 m x 2.3 m
Speed:
54 and 38 m/min.
Lifting height:
Up to 185 m
Alimak construction hoists at the world’s longest three-tower, cable stayed bridge

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