Client : Curtain Brothers
Madsen Giersing was engaged to design two bridges as part of a design and construct contract awarded to Curtain Bros for a 17km long road for the Kainantu Gold Project in Papua New Guinea. Part of the contract was to provide road access to the mine portal within 120 days of the award of contract.
The gold mine is situated in the Eastern Highlands Province. The connecting road passes through open grassland into virgin rainforest and rises 441m. The two river crossings represented a major construction challenge in this remote part of Papua New Guinea.
The majority of the material used for the project was pre-owned by the contractor. Both bridges were designed to the AustRoad Bridge Code.
Ramu River Bridge:
The first crossing at Ramu River required a 50m long steel bridge with a central span of 35m and 7.5m approach spans at each end. The main girders consist of two existing fabricated I-beams (4.5m apart) owned by the contractor, which were modified to suit the site and application. The deck is comprised of sheet piles bolted to longitudinal members and the valleys between the sheets filled with concrete.
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Kasese Creek Bridge: