Roughan & O’Donovan undertook the preliminary design, statutory approvals, detailed design specification and construction supervision of this three span extrados bridge over the River Erne in Co. Cavan.
Extending 140m, with a 70m main span over the River Erne, this bridge consists of a slender concrete deck with a double curved soffit that minimises obstructions to views along the river.
Four reinforced concrete pylons provide support by means of saddles to the extradosed cables.
Structurally, the bridge combines the efficiencies generated in traditional prestressed concrete and the use of shallow angled extrados cables.
Producing a structure that would adhere to the principals of geometric design while minimising its impact on the environmentally sensitive river landscape was challenging.
- Bridge engineering design
- Geotechnical design
- Construction supervision