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A Eurodeck digital weighbridge installed by Weightron Bilanciai is playing a dual role for North East Lincolnshire County Council at its works depot in Great Grimsby.

The 11m pit weighbridge, which has taken the place of an aging mechanical conversion weighbridge, can operate as both a standard static weighing scale and a dynamic axle weigher by utilising the Weightron’s Thruweigh software and CPD digital load cells.

Although pit-mounted weighbridges offer a number of site-related operational advantages, replacing aging units can be difficult, unless expensive and time-consuming civil-engineering modifications are carried out on the pit structure.

At many sites, being without a weighbridge for more than a few days can cause serious problems, usually making this option impractical.

Weightron has developed a proprietary technique for converting existing pit bridges and its Eurodeck is ideal for such replacements.

Its low-profile, modular construction means that non-standard imperial pit sizes and depths can be accomplished with minimum changes to the existing weighbridge foundations.

In this application the length of the standard 9m Eurodeck module was increased to approximately 11m and the height difference adjusted using specially designed steel legs, thereby ensuring the weighbridge fitted exactly flush with the surface.

The static weighbridge mode is used to weigh incoming waste collection vehicles, including street sweepers, gulley emptying tankers and lorries carrying fly-tipping.

Data from these weighments is collated via Weightron’s Winweigh software package to fulfil statutory Defra requirements for waste collection and origination.

For outgoing operational vehicles the weighbridge is used as a dynamic checkweigher to ensure vehicles do not go out onto the highways with overloaded axles.

This allows the council to optimise load logistics, while remaining within legal load limits for the vehicles.

The dual nature of the installation ensures a steady throughput of vehicles without unnecessary delays.

The Thruweigh system can weigh vehicles at speeds up to 5 km per hour and has a number of built-in features to optimise the weighing procedure.

Depending on the approach surface, individual axle weights can be measured within one per cent.

In dynamic mode, as the vehicle drives onto the weighbridge, the system measures and records the first axle weight.

When the second axle comes onto the deck, the system automatically subtracts the first axle weight from the new weight reading to give the second axle weight.

This procedure continues until all the axles have been individually weighed and recorded.

If an overloaded axle is detected, a signal is generated that can be used to trigger an audio or visual alarm.

If drivers inadvertently allow a wheel to stray over the edge of the weighbridge, the system automatically detects the corresponding weight change and again initiates an alarm.

The Eurodeck design has a good reputation for strength and durability in harsh environments.

The weighbridge features fully welded stainless-steel load cells and a special restraint system to minimise the damaging effects of harsh vehicle braking.

The main structural beams, which support a robust durbar deck, run lengthways, consistent with traffic flow and have sufficient depth so that they do not need stiffening plates.

This gives a consistent, well-drained weighing surface, avoiding any build-up of condensation.

The unsupported span between these beams is only 165mm, which means that with maximum loading in the centre of a standard module, there is minimum deflection.

Weightron Bilanciai

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