RC105 MarApr2023 - Magazine - Page 30
A unique gantry crane system was used by the general contractor, Graham, in the complex rehabilitation of
Edmonton’s Groat Road Bridge
would run on two parallel supports. One
was the “runway beam”, a large, very strong
temporary steel girder placed overtop of the
old bridge’s middle girder and running the
length of the bridge. The other was a triangular truss placed outboard and supported
by steel brackets, which were tensioned
across the pier using high-strength rods.
“It became an iterative process,” recalls
Jennings. “Senior engineers would sketch
out what it could look like, then we had internal discussions, then we reviewed it with
the contractor to make sure it was feasible,
each iteration improved it.” She describes
this process as “highly collaborative. I felt
like I really gained a lot being able to work
with Graham.”
Getting the runway beam, truss and
bracket system installed and running was
a large part of the overall project. There
were many technical constraints involved in
installing the system including accommodating the existing geometry of the bridge
to “fit” the support system accommodating
the bridge’s existing design which includ-
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RENEW CANADA – MARCH/APRIL 2023
RENEWCANADA.NET
GRAHAM
CONSTRUCTION
