[2] Canopies (made of fritted-glass and perforated steel mesh) are incorporated along parts of the inner spiral to provide shade for pedestrians.

[3] At night, the bridge will be illuminated by a series of lights that highlight the double-helix structure, thereby creating a special visual experience for the visitors.

[4] Pairs of coloured letters c and g, as well as a and t on the bridge which are lit up at night in red and green represent cytosine, guanine, adenine and thymine, the four bases of DNA.

Before any work began on the bridge, a mock-up was made from carbon steel to try to preempt any construction difficulties.

Fabrication of the elements worked from north to south; components were assembled into segments that could manage the Singapore roads.

So a dedicated workshop was specially set up to keep members for the Helix separate from other carbon and nitrogen steels.

The key issue was in launching the trusses over the central 50m wide navigation channel that had to be kept clear during construction to give safe access to other users of the bay.