Roads & Bridges

Nelspruit Northern Ring Road (N4)

Mataffin, South Africa

Nelspruit Northern Ring Road (N4)

The N4 is the main link between South Africa and Mozambique, and is one of the busiest roads in South Africa, averaging 140,000 VPD. WBHO delivered 8.5km of the N4 Nelspruit Northern Ring Road, involving:

  • Construction of nine bridges, totalling over 700 metres, some comprising post tensioned cast insitu decks and some with a precast beam and slab superstructure. Bridges crossed rivers, roads and railway lines. Bridges were constructed over two navigable rivers, the Crocodile River and the Nelspruit River. These rivers become floodways during the rainy season. Consequently, construction of the footings for the bridges required the use of coffer dams, created using sandbags, then backfilled with rock
  • 600,000m3 of cut, including 200,000m3 of blasting in hard rock to a depth of six metres
  • The project was delivered in an area of environmentally-sensitive wetlands within the savannah biome of South Africa.

Level 10
580 St Kilda Rd
VIC 3004
P: 03 9692 7100

Ground Floor
85 McLachlan Ave
Rushcutters Bay
NSW 2011

Level 9
120 Edward St
QLD 4001
P: 07 3073 9093

Level 10
Australia Place
15-17 William St
WA 6000
PO Box Z5192
St Georges Terrace
WA 6831
P: 08 6229 3700
F: 08 6229 3750

45 Hope Valley Rd
Naval Base
WA 6165
PO Box 202
Kwinana WA 6966
P: 08 9410 2100
F: 08 9410 2387

475 Edward Rd
WA 6530
P: 08 9923 7000
F: 08 9923 7050

12 Kershaw Street
WA 6280