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South Portland Street Bridge

South Portland Street Bridge

Primary Photographer(s): Bob Dover

Bridge Documented: September 18, 2014

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Facility Carried / Feature Intersected
Pedestrian Walkway (South Portland Street) Over River Clyde
Location
Glasgow: Glasgow City, Scotland: United Kingdom
Construction Date and Builder / Engineer
1851 By Builder/Contractor: Unknown and Engineer/Design: George Martin
Rehabilitation Date
Not Available or Not Applicable
Main Span Length
414.0 Feet (126.2 Meters)
Structure Length
414.0 Feet (126.2 Meters)
Roadway Width
Not Available
Spans
1 Main Span(s)
Inventory Number
Not Applicable

Historic Significance Rating (HSR)
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Bridge Documentation

This is an outstanding example of an eyebar chain suspension bridge. The bridge has lattice girder stiffening truss that was added to the bridge in 1871.

Official Heritage Listing Information and Findings

Listed At: Category A

Discussion:

Historic Environment Scotland Number: LB32668

Canmore ID:

Description

Alexander Kirkland, architect. George Martin, engineer. 1851-3. Rebuilt in 1851 to replace an early 19th-century timber footbridge, wrought-ironwork rebuilt 1871 by Bell and Miller to reduce the camber and increase the dip by 7'. Suspension bridge over River Clyde with single span of 414ft. Pylons are classical triumphal archways composed of fluted Ionic columns in antis flanked by Doric pilasters (paired Doric pilasters to bridge face) in polished honey coloured sandstone, central arch with moulded archivolt and keystone. These support entablature with deep plain frieze and cornice with blocking course. The chains break through the frieze. The deck is made of wrought-iron lattice girders and suspended on two pairs of 4 and 5 bar flat link chains. The walkway is tarmacadamed. The parapet is of thin latticework wrought-iron. The bridge retains some of its original cast-iron lampbrackets.

Statement of Special Interest

A group with Victoria, Albert Union Railway, King George V and Jamaica bridges. Originally a halfpenny was charged to pedestrians. In 1926 girders, suspenders and floor were replaced in steel. References

Bibliography

Gomme and Walker 1987, p. 111. J R Hume 1974, p.219. Peter Verity " The Conservation of Early Iron Suspension Bridges in Scotland" (Edinburgh College of Art Thesis, 1994)

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