Background
• Construction of Riversands dam underway adjacent Century blvd, Johannesburg.
• Client requirement: A fit for purpose pedestrian bridge to cross the dam.
• Bridge approx. 35m long.

Bridge Concept
• Various options were discussed but options having a central pier on the dam wall were disregarded.
• A structural steel arched pedestrian bridge was proposed to cross the dam using a single span.
• This provided the most aesthetically pleasing bridge solution and negated construction in the waterway.

Structural Framing
Geometry:
• Arched truss spanning 34.85m between bearing centres.
• Truss Depth: 1.50 c/c
• Truss width: 1.88m c/c
• Supported on elastomeric bearings on reinforced concrete abutments.

Structural steel:
• Steel grade: S355JR
• Top & bottom chords: 219x6.0 CHS
• Diagonals: 102x5.0 CHS
• Verticals: 127x6.0 CHS
• Pinned in place using 1xM24 bar in slotted holes at each bearing.

Structural solution
• 76x3.0mm CHS Handrails.
• FRP grati