6.4.6 Built in hoists

Built in hoists with integral trolleys are available with a rigid or flexible connection between the hoist and trolley dependent on the hoist design. Three types of built in travelling trolleys are available:

  1. Push-pull, sometimes known as hand pushed.

  2. Hand geared, commonly referred to as geared.

  3. Powered travel.

These permit the hoist to be mounted on runways, jibs and mobile supporting structures.

6.4.6.1 Fixed suspension and foot mounted hoists

Fixed suspension is appropriate where a hoist is to be rigidly mounted to a permanent structure, such as a fixed jib, or be built into a special trolley. In this case, top mountings are provided into which the mounting plate of the supporting structure may be fixed. Similarly, where the hoist is to be permanently mounted to a structure or crab unit, foot mounted hoists are appropriate. In this case, feet which enable the hoist to be directly bolted in position are provided. These may be positioned to allow the hoist to be underslung from a structure, as may be the case over a shaft, or overslung, as may be the case when fitted to a crab unit.