A passenger hoist is a temporary lifting system used on construction sites to transport personnel and materials. It consists of a cage or car that travels along a steel track using a rack and pinion drive system. The height of the track varies based on the number of sections attached to the building. The system can be mounted outside or inside the building, and sometimes features a platform at the top for easy access.
A passenger hoist is a lifting system often used on construction sites to lift personnel and materials to the upper levels of unfinished buildings. The freight elevator itself consists of a cage or car that people will stand in during transportation, and a rail mounted to the building. The car or cage will travel along this track by means of a rack and pinion drive system and the car can be stopped at various points along the track. This allows people to load or unload at any floor along the length of the track.
The rail itself is usually made from steel and consists of several lengths attached together. This provides stability and makes the passenger lift construction process much quicker and easier. These structures are usually temporary, so smaller track sections will also make deconstructing and transporting the pieces much more manageable. The height of the dumbwaiter varies according to the number of track sections fixed to the building. In most cases, the track pieces come in 25-foot (7.62-meter) sections, so the finished track height will usually be a multiple of 25.
Once the track is in place, a car or cage can be attached to it. This will be the primary supporting structure for the goods or people being carried, and is usually an open-air structure which is surrounded on all sides by a wall or gate. In some cases, the cage may be closed to prevent injury from falling debris or other objects. The cage is driven along the passenger lift system by a motor driving a rack and pinion system; this means that two or more gears will work together to raise or lower the cage. The specific design of the system will vary based on the size and application of the passenger lift.
Most often the entire system is mounted outside a building, although in some cases it is possible to mount the system within the building structure. This is a much more difficult process, however, as lengths of track usually have to be placed by a large crane. Sometimes the passenger lift is a free-standing unit that does not need to be bolted to a building; this type of elevator often features a platform at the top that allows passengers to walk from the lift system to the structure under construction.
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