Travelling girder trolleys As mentioned above, hand operated chain hoists, hand operated lever hoists and power operated hoists are often used in association with travelling girder trolleys. Whilst not themselves a lifting mechanism, trolleys enable the lifting mechanism, together with its suspended load, to be moved along suitable tracks such as runways. They may be separate from the lifting mechanism, which may be suspended by its top fitting to the trolley load bar, or built into the mechanism as an integral item.
