Above-ground or recessed test stand: what actually changes
Two installation methods coexist. The choice depends not on measurement performance but on construction work, daily operations, and building constraints.
A recessed test stand is integrated into a ground-level structure: the vehicle drives directly onto the rollers. An above-ground test stand is mounted on the slab, and the vehicle accesses it via ramps. This should not be confused with a “pitless” test stand, which refers to the absence of an inspection pit, nor with a mobile test stand, which is designed to be moved.
|
Recessed |
Above-ground |
| Work |
Structure to be built: earthwork, formwork, slab repair. More extensive and time-consuming work. |
Installation on an existing slab if its load-bearing capacity allows it. Minimal work required. |
| Vehicle access |
Ground-level access, no ramp required. |
Access ramps: additional length required upstream and downstream. |
| Footprint |
Footprint limited to that of the bench; unobstructed traffic around it. |
Footprint of the bench and its ramps, which remain in place permanently. |
| Use of the span |
The span remains usable for other operations when the bench is not in use. |
The bench area is less versatile. |
| Reversibility |
Permanent installation; difficult to move. |
Installation is easier to dismantle or redeploy. |
| Cost factors |
More extensive civil engineering work; comparable equipment. |
Reduced civil engineering work; ramps and ground preparation required. |
In summary: A new workshop or one undergoing major renovation, with a bay dedicated to inspection, often opts for the recessed system; a workshop already in operation, constrained by its floor slab or a lease, finds the above-ground system a faster solution to implement. The exact technical requirements depend on the selected model and will be confirmed during the design phase.