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P&S Consulting Engineers

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Projects » Selly Oak Phase 1 Bridge Propping

Selly Oak is an area of Birmingham notorious for congestion and as phase 1 of the bypass scheme, a new roundabout leading to the Phase 2 works and a replacement bridge were required over the Dudley No.2 Canal. The new bridge over the canal was to be widened to accommodate four lanes of traffic.

The new bridge was constructed using a phased methodology thus ensuring that the existing bridge could continue to be used by live traffic. On a secondary bridge construction phase, the requirement was for live traffic to be transferred onto the partially demolished bridge.

Birse Civils Ltd commissioned PaSCoE to provide a number of temporary and permanent works on the project including a stability assessment of the partially demolished bridge deck and the design of a temporary support system beneath the existing deck to maintain live traffic loading.

The PaSCoE assessment of the existing structure, based upon archive drawings of the bridge, demonstrated that the partially demolished bridge would be incapable of supporting live traffic with an acceptable factor of safety; therefore a temporary propping system was designed.

The system was in use for 6 months with no measurable deflections under live loading conditions.

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