hardengreen roundabout dalkeith, scotland · dalkeith, scotland. sat feb 15 fri feb 14 rigging the...
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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.
RESOURCES
CRANES 1 telescopic crane
CREW 13 Mammoet professionals