Cassette Cassettes allow very short construction times. They are therefore particularly suitable for subsequent installation in existing workshops and pits. Manufacturer guarantees dimensional accuracy.
Frames Usually, in the case of new buildings, the frame is the ideal choice. The factors time, cost and precision however are carried mainly by the customer.

Clean Layer A layer approx. 8 cm thick with a concrete quality of at least B15. It serves as a support for the cassette.
Levelling Tool This enables precise adjustment of the cassette during installation. The levelling result should not exceed a tolerance of more than ± 2 mm across the entire length and breadth.
Empty Pipes For the electrical installation, as a drainage outlet and possibly for ventilation purposes, empty pipes with a Ø of 100 mm must provided.
Fixing Layer A roughly 30 cm high concrete layer in concrete quality of B25.
Middle Layer In B25 quality, this concrete layer connects directly to the floor plate.
Stone Anchors Evenly distributed, the stone anchors ensure an uniform distribution of force across the floor plate.
Floor Plate This corresponds to the height of the hall floor. Both the floor plate and the reinforcement are subject to static calculations.
Fitted Flooring Particularly the strength plays a decisive part in the choice of fitted flooring. The evenly distributed vertical working load amounts to 10 kN/m². 10 kN/m².
Cassette/Frame Depending on the length of the Ground Lift, the cassette or frame will be delivered in one or several parts. Encased in concrete, the mobile and fixed lifting posts and the roll covering find their place.

The installation of an In Ground Lift should be planned and executed with the utmost care. The main steps in the installation of a cassette or frame are explained below: 

Once the pit has been dug out, a drainage pipe can be laid as necessary. In the case of the cassette construction the granular sub-base is cemented on top of the gravel layer.

To permit the cassette to be levelled, stay bolts are screwed into the clean layer. The cassette, placed on top of these, can then be precisely aligned with the help of the adjusting nuts. In the case of the frame construction, the concrete can be introduced to the pit as the second step. First, the empty pipes for the electrical installation should be positioned.

Now the cassette is encased in liquid concrete up to a height of approx. 30 cm. Care should be taken, with this so-called fixing layer, that the cassette does not “swim”. In the case of a frame, the remaining gap is filled with gravel to the upper edge of the pit.

For the cassette construction the empty pipes for the electrical installation are now laid. The middle layer is made by pouring in concrete up to the lower surface of the floor plate. For the frame construction, the stay bolts can now be screwed into the pit and the frame can be levelled.

The last step is the construction of the floor plate and the fitted flooring. Finally, the electrical installation work can be carried out via the empty pipes already laid.

How many lifting posts for whom? At the start of the decision-making phase for an in-ground truck lift one of the first questions is how many lifting posts are needed. The following is intended to help with this decision:

The smallest variation, the 2-post Mammut, is mainly for lifting towing cabins, trucks and busses.

Where semi-trailers or articulated busses are also lifted, a 3-post Mammut is necessary. 

The 4-post Mammut offers more of everything and is ideally suitable – thanks to 2 control panels – for working on two vehicles at once in the same lane. Due to the standard synchronisation control the full scope of performance becomes particularly apparent when lifting a truck together with its trailer.

 

Quattro Analysis for Decision-Making Many questions still remain to be answered when you decide to choose an In Ground Lift. To help in the decision-making process, the nogra Quattro Analysis provides a powerful decision matrix. Starting with four basic analytic approaches, which are explained in more detail below, our specialists configure a custom-built In Ground Truck Lift.

The Truck Fleet Analysis concentrates primarily on the types of vehicles to be lifted. It gathers information such as type and length, lifting possibilities and standard number of axles. The future-trends factor is also important in the Truck Fleet Analysis.

The Workshop Analysis assesses the „on-site“ situation. The height of the workshop, for example, should be at least 6 m. Lane length and width help to determine which types of In Ground Lifts are possible.The Activity Analysis examines the suitability of the planned range of applications. What type of work is to be carried out on the raised vehicle? Is a pit also available?

Finally, the Installation Analysis examines whether a cassette or frame construction is best for the job. Other factors playing a roll are whether the building is old or new, and the time schedule available for the project.