The Ground Support Tower is manufactured with the purpose of providing a lifting medium for the variety of Thomas trusses ranging from the smallest general purpose truss - through to the largest Supertruss. The Tower system is available as 30.5cm and 38cm. The Towers provide a method of support for truss grids in venues where flying by other methods is impractical. Each Tower is capable of lifting to maximum heights of 12m (30.5cm tower) and 15m (38cm tower) and capable of lifting 2 and 4 tonnes respectively (which must include the self weight of the grid). The truss rig is raised and lowered by means of chain hoists, such as CM lodestar, which work with a roller beam and double chain fall to become an integral part of the system. Towers can be used outside when used with suitable restraints
