Pitted and semi-pit weighbridges.
What a pitted (pit-type) weighbridge is, how a semi-pit differs, the civil work each needs, drainage, pros and cons, and when to choose one over pit-less.
A pitted (pit-type) weighbridge sits in a concrete pit so its deck is level with the ground and trucks drive on without ramps. A semi-pit weighbridge uses a shallower pit with the deck at or just above ground level. Both save space but need more civil work and good drainage than a pit-less weighbridge.
A pitted weighbridge (also called a pit-type or pit weighbridge) is installed in a concrete pit so that its deck is level with the surrounding ground. Trucks drive straight on without ramps, from either end or, where the layout allows, from the side.
Full pit or semi-pit?
| Full pit | Semi-pit | |
|---|---|---|
| Deck level | Flush with the ground | At or slightly above ground level |
| Excavation | Deepest | Shallower |
| Ramps | None | None or very short |
| Retaining walls | Yes | Yes, lower |
| Drainage | Drain and sump essential | Drain essential |
Both use the same deck, load cells and electronics as a pit-less weighbridge. The difference is the foundation, which we draw for your exact size and site.
Advantages
- Smallest footprintNo ramp length at each end, so it fits tight plots and busy yards.
- Any approachVehicles can turn onto the deck where a ramped bridge would be awkward.
- Flat yardForklifts, carts and pedestrians can cross the deck.
What to plan for
- More civil workExcavation, retaining walls and a deeper foundation than pit-less.
- DrainageRain and wash water must leave the pit through a drain or sump; keep it clear.
- Access for serviceLoad cells sit below ground; the drawing leaves room to reach them.
- GroundwaterOn a high water table, a pit-less or semi-pit layout is usually the safer choice.
Pitted or pit-less?
Choose pit-less when you have about 8 – 10 m free at each end for ramps; choose a pit or semi-pit when you do not. The full comparison also covers RCC and modular decks.
Pit-type weighbridge details Request a pit foundation drawing
Questions, answered.
What is a pitted weighbridge?
What is a semi-pit weighbridge?
How do you keep water out of a weighbridge pit?
Does Symphony make pit-type weighbridges?
Tell us your site. We recommend the platform.
Send a site photo, vehicle size and daily vehicle count. An engineer replies within one working day.