MONDAY MORNINGRUSH HOUR WAITS FOR NO ONE.

HARDENGREEN ROUNDABOUTDALKEITH, SCOTLAND

SATFEB 15

FRIFEB 14

RIGGING THE CRANE WORKING THROUGH THE NIGHT

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MOVING HEAVEN AND EARTH WITH A SINGLE CRANE.

SATFEB 15

LIFTING BEAM 3SATFEB 15

BEAM 1 AND 2 LIFTED INTO PLACE

A Z

The Borders Railway project is the

re-commissioning of an abandoned

railway line from Edinburgh to

Tweedbank, Scotland. Project

owner BAM Nuttall asked

Mammoet to install four 107-ton

concrete beams as part of a bridge

over the busy Hardengreen

roundabout. For the operation,

the roundabout was closed off to

traffic over the weekend. With

only 56 hours to complete the job,

Mammoet applied the principle of

less is more, mobilizing a single

crane that could lift and install all

four sections from one location.

This effectively cut operation time

in half compared to alternative

methods.

Construction on the Hardengreen

roundabout had begun seven months

prior to the lifting operation and

included the installation of the bridge

piers the beams had to be lifted onto.

The time window for the actual lifting

was just 56 hours. After that, Monday

morning traffic would arrive to take

over the busy roundabout. This kind

of time pressure meant that every

hour saved during the operation was

essential.

Mammoet’s solution was one of

quality over quantity. By bringing in a

single crane large enough to carry

out all lifts from one position, overall

operation time was cut in half. While

other cranes with comparable lifting

capacities needed 14 hours to be

rigged, the LTM 11200-9.1 crane

only needed six. A second major

advantage of the single-crane

approach was the simplification of

the beam deliveries. Thanks to the

crane’s vast reach, the beams could

be delivered to the same pick-up

point, saving precious time moving

from one pick-up location to the next.

With the strict deadline of Monday

morning rush hour, overshooting the

production schedule was simply not

an option. Mammoet’s time-saving

solution got the job done with time to

spare, giving the crew more room

to breathe and more room for

contingencies. Having started on

Friday evening, all beams were in

place and the crane dismantled by

Sunday afternoon. Well in time for

the first cars driving onto the

roundabout the next morning and as

if the bridge had always been there.

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CRANES 1 telescopic crane

CREW 13 Mammoet professionals