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City Compliance Vehicles Pass Test

In controlling traffic movement and the quality of the

air, local authorities are setting ever stricter limits on

what is admissible in highway trucks.

One company, the UK based Premier Carriers, invest-

ed in what is believed to be the first flat-bed Mercedes-

Benz Econic, designed to go above and beyond current

safety regulations.

Originally configured as a waste handling vehicle, the

26 t truck was supplied and specially adapted in just

eight weeks by S&B Commercials at Welham Green.

The truck underwent work to reinforce the load-bed

to create the flat-bed body. The dealership then made

changes to the original specifications and mapping of

the vehicle, including re-configuring both gearbox and

air suspension as well as undertaking a full inspection

of the electronics within the chassis.

After a complete repainting and updating of the cab,

the final act was the fitting and connection of the exter-

nal safety cameras.

Within days of delivery, the Econic started work de-

livering blockwork for use in the construction of two

new Ticket Halls at Crossrail’s Farringdon Station.

The entire Premier Carriers fleet and driver team is

now fully compliant with all the requirements of major

construction sites across the capital.

The rear-steer gives a tight turning circle for making

deliveries in restricted operational environments.

The need for such a vehicle was made clear when

the company was unable to make a one-off delivery to

a Crossrail site in central London using existing trucks

Premier Carriers

Leading The Way In

Concrete Strength

Testing

A ground-breaking new way to test the strength

of sprayed concrete has been successfully tested

at the London Bond Street Station underground

upgrade project.

The project, a joint venture between Costain

and Laing O’Rourke on behalf of London

Underground Ltd, is the first in the world to test

the new technique in a production

environment.

The technique under test is

Strength

Monitoring

using Thermal Imaging (SMUTI), a

patent-protected invention created by Dr Benoit

Jones from Cambridge University.

It uses a thermal imaging camera to track the

temperature of concrete as it is sprayed to form the

tunnel lining. Knowing this temperature history enables

the engineers to calculate the amount of hydration that

has taken place in the concrete, and hence its strength.

It is a significant step forward for health and safety,

said Aled Davies, Costain Senior Tunnel Engineer who

has worked closely with Dr Jones on the trials.

“SMUTI allows us to directly monitor the

compressive strength development of sprayed

concrete whilst remaining at a safe distance.

This is a substantial improvement over the

current method, which relies upon a small test

panel being representative of the entire sprayed

concrete advance to prevent personnel being at

risk from sprayed concrete lining falls.”

In March, following extensive laboratory testing,

production trials began on-site. First, the concrete in

twelve sprayed concrete panels was tested simultane-

ously using the established in-situ tests and SMUTI.

This provided sufficient data to carry out trials in an

actual production environment and in March, the project

implemented the SMUTI system alongside existing test

methods for the first time.

Costain

Francisco Gallego, Section Engineer, uses a thermal

imaging camera to monitor a section of sprayed con-

crete lining within the Concourse 1 tunnel at Bond

Street Station Upgrade.

Contractors World International Vol 7 No 3

50

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