Powered Gantry System designed and manufactured by the Clow Group at Scotrail Bridge, Stepps

Clow Group was commissioned by Scotrail to design and manufacture a powered gantry with 3-dimensional movement. The purpose of the gantry was to provide access and maintenance for the rail-bridge over the M80 in Glasgow.

Running rails were installed under the top truss to enable the gantry, with its suspended cradles, to travel longitudinally over the full 100m. The gantry also operates horizontally through the sides of the warren truss. Suspended cradles operate on the outer-face of the truss.

The cradle can also be lowered internally to maintain inside faces of Warren Truss, however a fail-safe device was installed to prevent the cradle being lowered into the train envelope. The design, installation and electrical control circuits were all carried out by Clow Group Engineers.