Design
The bridge consists of a 50 metres (160 ft) bridge deck, consisting of three 17 by 17 m (55 by 55 ft) steel and concrete decking segments, covered with tarmac. The deck is supported by twenty-two 51 mm diameter spiral steel cables originating from both sides of a 25 metres (82 ft) high arch. The arch is made of six prefabricated trapezoid steel box sections, and spans the bridge diagonally. The bridge is illuminated at night.
The arch varies between 1.6 metres (5.2 ft) wide by 1.5 metres (4.9 ft) deep at the bases to 3 metres (9.8 ft) wide and 0.7 metres (2.3 ft) deep at the top. It is supported by a pair of 8.5 by 6.5 by 5.5 m (27.9 by 21.3 by 18 ft) concrete blocks, which bear most of the weight of the bridge. The deck is supported by piled abutments, which incorporate areas for bearing and expansion joint inspection and maintenance. The arch is kept in shape by a number of internal stiffeners and diaphragms, with the top section filled with concrete. To minimise internal rust, the lower sections of the arch were coated with a vapour corrosion inhibitor, with portholes with removable covers inserted into the arch so that the inside can have additional coats applied in the future.
Read more about this topic: Hulme Arch Bridge
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