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As an innovative and complex structure the Millennium
Bridge has been designed to achieve what may appear a simple form.
The 4m wide aluminium deck is flanked by stainless steel balustrades
and is supported by cables to each side. These cables dip below
the deck at midspan enabling unimpeded views of London.
The bridge is a very shallow suspension bridge where the highly
tensioned cables sag 2.3m over the 144m of the central span, a span
to dip ratio of 63:1. This is around 6 times shallower than a conventional
suspension bridge.
The four cables on each side of the deck are anchored at each abutment
and propped by two river supports. The lightweight deck passes between
these cables and is supported by transverse arms which clamp onto
the cables on each side at 8m intervals.
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