Help Choosing – The best elevator for your project?

The first place to start with help choosing the right elevator is this primer on the four main types of elevator drive systems.

Holeless Hydraulic

Hydraulic pistons are mounted to the pit floor on either side of the car, and attached to the car crosshead.  The power unit in the machine room pumps oil into the jacks to raise the car and opens the valve to release the oil back into the tank to lower it.

In Ground Hydraulic

A hole is bored in the center of the pit, and a hydraulic piston, encased in a PVC liner, is set into the hole and attached to the bottom of the car platform.  The power unit pumps oil into the jack to raise the car and opens the valve to lower it.

Machine Room-Less Traction (MRL)

A small machine is mounted at the top of the hoistway, offset to one side, and moves the car up and down via cables, sheaves and counterweights.  The controller is mounted outside the hoistway, in a small controller space.

Overhead Traction

A machine room is built at the top of the hoistway and houses a large machine and the controller.  The machine is mounted at the top of the hoistway and moves the car up and down via cables, sheaves and counterweights.

 

Elevator Options
Option Holeless Hydraulic In-Ground Hydraulic Machine Roomless Traction (MRL) Overhead Traction
Travel Limit 60 100 Unlimited Unlimited
Most Cost Effective Travel Range Up to 30' 30'- 60' >60' >60'
Maximum Speed 200 fpm 200 fpm 500 fpm 500 fpm geared or 2000 fpm gearless
Maximum Capacity Unlimited Unlimited 5000 lbs Unlimited
Footprint Smaller Smaller Larger (Counterweight Stack) Larger (Counterweight Stack)
Machine Room Best at lowest level adjacent
can be remote or on other floor.
Best at lowest level adjacent
can be remote or on other floor.
Controller in control space
best at top level adjacent
can be remote or on other floor.
Top of hoistway
accessed from roof.
Lead Time 8 Weeks 8 Weeks 12-16 Weeks 20 Weeks

Other factors can come into play when choosing elevator type.  A need for shorter lead time and smaller footprint may drive you to a hydraulic elevator even on a higher rise project.   Or you may opt for an MRL instead of hydraulic on a low-rise application because of a desire to save energy or avoid using oil..

If you need help choosing which is best for your project, contact us and we’ll be happy to talk you through the options in more detail.

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