A mobile access tower is a tower formed with scaffold tube and mounted on wheels. It has a single working platform and is provided with handrails and toe boards. It can be constructed of prefabricated and tubular frames, and is designed to support a distribution load of thirty pounds per square foot.
The height of the working platform must not exceed three times the smaller base dimension. No tower should have a base dimension of less than 4 feet. Rigidity of the tower is obtained by the use of diagonal bracing on all four elevations.
Castors used with the tower should be fixed at the extreme corners of the tower in such a manner that they cannot fall out when the tower is moved. The tower needs to also be fitted with an effective wheel brake. Wire lashing should be used to secure the ladder to the tower.
It is vital to use the utmost care when moving mobile access towers. All persons, equipment and materials must be removed from the platform. The access tower should be moved by pushing or pulling it at the level of the base. Under no circumstances should mobile access towers be moved while individuals are on the platform.