Irtysh River Bridge

Project description

This six-lane suspension bridge was constructed between 1998 and 2002, to cross the Irtysh River in the city of Semipalatinsk in eastern Kazakhstan. It has a main span of 750 m and a total length of 1086 m, and was designed and built by a Japanese-lead consortium.
The very tight time scheduling imposed by the bridge construction project presented some significant challenges for the supply of the bridge’s bearings, with just fourteen weeks allowed for design, manufacture and delivery.

mageba scope

mageba supplied some exceptional components to control the bridge deck’s movements and keep it stable. At both ends of the bridge, enormous rocker bearings (pendulum tension force bearings) were supplied to resist uplift forces. These are up to 6.70 meters long and weigh 8000 kg each. Equally enormous wind shoes were also delivered, one for each side of each abutment, to resist transverse wind forces. Finally, 20 RESTON-SPHERICAL bearings, for loads of up to 10,500 kN, were also supplied, after testing of raw materials for notch impact value and tensile strength at –50 °C.


A rocker bearing during a rotation test in the factory


Two wind shoes, ready for delivery from the ­factory in Switzerland

Key Data


Rocker (pendulum tension force) bearings, Wind shoes, RESTON-SPHERICAL bearings






Suspension bridge


Main span 750 m