The Iron Bridge, Culford Park

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The Iron Bridge, Culford Park
Iron Bridge at Culford 3.jpg
The Iron Bridge (June 2020)
Coordinates 52°18′05″N0°40′46″E / 52.301266°N 0.679499°E / 52.301266; 0.679499 (The Iron Bridge) ,
OS grid reference TL888704
CarriesPedestrian traffic
Locale Culford Park near Bury St Edmunds
Owner Culford School
Heritage status Grade I listed
Characteristics
Design Single arch bridge
Material Cast iron
Width20 ft (6.1 m)
Longest span60 ft (18 m)
No. of spans1
Piers in water0
History
Designer Samuel Wyatt
Fabrication by William Hawks and Co of Gateshead
Construction costest.£10,000
Openedc.1804
Location
The Iron Bridge, Culford Park

The Iron Bridge is a grade I listed early cast iron bridge crossing a tributary of the River Lark in grounds of Culford Park in the village of Culford near Bury St Edmunds, Suffolk.

Contents

The bridge is of exceptional interest as one of the earliest bridges with an unmodified cast-iron structure to survive. Built for Charles Cornwallis, 2nd Marquess Cornwallis the owner of Culford Park in 1804, it is a unique example of a cast iron bridge built to the patent of Samuel Wyatt. The rib castings feature oval tubular sections and is the earliest known example with hollow ribs leading to the structure received a grade I listing on 15 May 1996. [1]

The woods to the South West of the bridge is known as Iron Bridge Carr. [2]

Design

On 10 June 1800 Samuel Wyatt patented a new design for ...constructing bridges, warehouse, and other builds without the use of wood... which was published in the Repertory of Arts and Manufactures: Vol.14 in 1801.

The patent describes how to construct a bridge using:

...hollow pieces of cast iron in a longitudinal direction and plates or pipes of the same material, having sockets on them, to receive the ends or shoulders of the said pipes, tubes, or other hollow pieces, placed transversely; and extending from one side of the bridge to the other, so that when the required number of pipes, tubes, or other hollow pieces of cast-iron, and of transverse places, or pieces, are put together they form the arch, and so firmly fix, connect, and unite, all the parts, as not to require the aid of screws, bolts, cramps, or any wrought-iron fastenings whatever; but, for the sake of giving the joins a more equal bearing, it will be proper to run lead or cement into them. [3]

The bridge at Culford follows this design with 5 cast iron voussoirs making up one segment arc which is repeated six times forming the 60 ft span connected with socketed joints. Arched plates between the ribs carry the infill up to roadway level with channelled granite abutments on either side. Masonry balustrades line the edge of the bridge 20 ft wide with carved marble urns at the ends. [4]

Samuel Wyatt's Iron Bridge.png
Diagram of an Iron Bridge from Samuel Wyatt patent of 1800
Diagram of The Iron Bridge, Culford Park.png
Diagram of the Culford Park bridge as seen from the water

Construction

The metal segments for the bridge were cast in 1804 by William Hawks and Son of Gateshead and weighed 80 tons, along with 2 tons of lead at a cost of £1,457. [5] It's estimated that the additional cost of transportation, stonework, and construction gave a total of £10,000 for the installation of the bridge, [6] [7] approximately £1 million in 2019 prices. [8]

Samuel Wyatt 's brother James was appointed in the 1790s to make modifications to Culford Hall which drew heavily on Samuel's work at Shugborough Hall so it is likely Samuel's bridge design was introduced at this point. [9]

The infill of the bridge between the deck and road surface was examined in 1998 as was found to be made up of; a single layer of yellow bricks, 15cm of chalk, 40cm of hoggin, finished with 5cm of topsoil with slight different composition at the abutments. It is believed that this material dates from the original construction. [10]

Cross section of Samuel Wyatt's Iron Bridge.png
Cross section of Samuel Wyatt's Iron Bridge design of 1800
Cross section of Iron Bridge, Culford Park 01.png
Cross section of the bridge showing the structure and infill uncovered doing maintenance work in 1998.

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References

  1. "THE IRON BRIDGE AT CULFORD SCHOOL, Culford - 1269105 Historic England". historicengland.org.uk. Retrieved 12 June 2020.
  2. "Ironbridge Carr". britishplacenames.uk. Retrieved 11 February 2021.
  3. The Repertory of Arts and Manufactures. G. & T. Wilkie. 1801.
  4. "Culford Hall Bridge - Graces Guide". www.gracesguide.co.uk. Retrieved 9 January 2021.
  5. "Marquis of Cornwallis' cast iron bridge cast by William Hawks and Sons, Gateshead, 1804". Buddle Collection, ID: NRO 3410/Bud/24/34. The Mining Institute.
  6. A biographical dictionary of civil engineers in Great Britain and Ireland. Skempton, A. W. London: Thomas Telford. 2002. p. 807. ISBN   0-7277-2939-X. OCLC   50998738.{{cite book}}: CS1 maint: others (link)
  7. "Culford Hall & Gardens". Bury and Norwich Post. 25 September 1866. p. 8.
  8. "Inflation calculator". www.bankofengland.co.uk. Retrieved 18 January 2021.
  9. Paine, Clive R. (1993). The Culford Estate 1780-1935. Ingham Local History. ISBN   0-9522204-0-7. OCLC   786166058.
  10. Wall, William (1998). "An Early 19th Century Cast Iron Bridge at Culford School, Bury St Edmunds, Suffolk: Archaeological Monitoring". library.oxfordarchaeology.com. Retrieved 11 February 2021.