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Tuckton Bridge
River Stour, Bournemouth, Hampshire
associated engineer
Louis Gustave Mouchel
date  1905
era  Modern  |  category  Bridge  |  reference  SZ148923
ICE reference number  HEW 993
An early reinforced concrete road bridge across the River Stour, and possibly the first such bridge to bear a double track tramway.
Tuckton Bridge was commissioned to replace a timber toll-bridge and many features imitate in reinforced concrete the original timber design.
The roadway is 347ft between abutments, supported over a wide central span of 41ft 2in, eleven 25ft 6in spans and a 12ft 9in half-span at either bank. Footways of 5ft 6in in width are cantilevered at either side of the roadway, now with cast-iron railings replacing the original concrete.
The main spans are constructed of segmental arch ribs, 12in deep and 11in wide with a rise of 5ft. These are braced at the piers by cross beams with curved soffits for lateral stability, as the columns are not braced lower down.
The main arch ribs, with open spandrels, support vertical columns on which cross beams rest to bear the deck. In later bridge designs, such curved, concrete arch ribs were replaced by more heavily reinforced straight beams which made for easier construction.
reference sources   LG/SJ

Tuckton Bridge