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Unique Category elevators

Unique Commercial elevators

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There are many different types of elevators available for commercial use. Grant Residential Elevators has the expertise and experience in designing, manufacturing, installing and servicing lifts and elevators.

The earliest types of elevators are in-ground elevators that are based on a single stage hydraulic jack which is located right under the car. A variation to this traditional design is the in-ground side / rear slung type of elevator. While the in-ground elevators are the most economical and easiest to install, these may not be very suitable for areas with high seismic activity as there is a serious possibility of oil contamination in the ground.

The next categories of elevators use wire ropes along with two hydraulic jacks and are termed as twin jack roped hydro elevators. Due to the use of two jack and wire ropes this design provides maximum structural stability. The cantilever roped hydraulic elevator, just like the twin jack roped hydro elevators, also employs wire ropes along with hydraulic jacks. Both these designs allow the car to raise two feet for every one feet of rise of the hydraulic jack.

In recent times, the elevator designs have incorporated geared machine, ropes, and counterweights which have replaced the hydraulic equipment. This design is termed as traction elevators and it has guide rails and additional counterweight rails located on each side of the car. While the geared machine is usually located, along with other related equipment, in a machine room located at the top of the building, it is also possible to locate the same in the basement. This type of elevator design has much higher power efficiency and allows much higher car speeds as compared to its predecessors. On the negative side, traction elevators are more expensive to install and difficult to maintain.

The latest designs, namely, traction Machine Room Less (MRL) elevators, have replaced the geared machine (as in traction elevators) with a gearless machine. Since the gearless machine can be installed inside the hoist way there is no need for a machine room thereby saving valuable floor space. While these elevators are lower in cost as compared to other elevators, they are more difficult and expensive to operate and maintain. These elevators are most suitable for low to mid rise commercial buildings.