Zutari was commissioned to conduct the preliminary and detailed design, assist with tender evaluation, and supervise construction. Due to the width and flow of the Usutu River, the largest in the country, traditional formwork construction was not feasible. An incremental launch method was selected instead.

Unlike typical incrementally launched bridges that use concrete post-tensioned with concentric cables to prevent cracking, the Siphofaneni Bridge was built using reinforced concrete. Zutari adopted a cost-effective approach by allowing controlled cracking during construction, eliminating the need for frequent visits from specialist subcontractors. Final-stage post-tensioning was applied once the deck was in place to close all cracks, achieving both durability and efficiency.