gantry

For four days, Hallam and more than three dozen other activists climbed a gantry and thereby blocked traffic in London’s critically important M25 motorway.

They are known as gantry cranes - meaning they straddle and overlook their workspace - and are of Krupp Ardelt design, modified to meet Harland and Wolff's special requirements.

The Just Stop Oil campaigners climbed gantries on the motorway in November 2022, forcing police to stop the traffic, in an attempt to cause gridlock across southern England.

Forty-five Just Stop Oil protesters climbed gantries on the motorway in November 2022, forcing police to stop the traffic, in an attempt to cause gridlock across southern England.

They are helped by a gantry crane — as an automotive shop might hoist an engine — and the floor of the kiln rolls out to meet the incoming vessel.