Sterkspruit Valley Viaducts, Key Ridge to Hammarsdale
BVi has been appointed by SANRAL for the detail design and construction monitoring of the realignment
of the N3 from Key Ridge to Hammarsdale. This critical portion of road suffers from heavy delays and congestion,
and this partial realignment forms part of the N3 capacity upgrade, while increasing road safety to users.
Our appointment includes the construction of two new viaducts, each with a separate southbound and northbound carriageway of 22.3m in width, carrying 5 lanes of traffic in both directions. The interesting and challenging aspects of designing both of these structures will be the 22.3m carriageway width, the construction sequences accommodating the current N3 alignment, and the foundation conditions of the site.