Twin Jack Holeless Elevator

This design utilizes two hydraulic jacks and provides maximum structural stability. The jacks, located on each side of the car, are either single-stage or telescopic. The appropriate jack type is determined by the amount of travel and the project conditions. The single-stage jacks are popular for two-stop arrangements, while telescopic jacks are generally used for three- and four-stop projects.

Advantages:

No jack hole is required. This eliminates the cost of drilling and the risk of oil contamination.
Accommodates front and rear openings in any configuration.
Available for both low and high capacity cars.

Disadvantages:

Usually requires more overhead than an In-Ground project. The greater the travel, the greater the overhead must be.
Requires a wider hoistway for the jacks.
The material cost is typically higher than that of an In-Ground package.

Passenger Twin Jack Holeless 1 & 2 stage

Single Opening (F)