Ladykirk and Norham Bridge
|Ladykirk and Norham Bridge|
The Ladykirk and Norham Bridge
|Carrying:||Road traffic (B6470)|
|Built 1885 – 1887|
The previous bridge here was a timber trestle built between 1838 and 1839 by J. Blackmore. The bridge was funded by subscribers purchasing shares; David Robertson, 1st Baron Marjoribanks paid £3000, and ten others paid £500 each.
This wooden bridge used curved ribs, eight planks deep at the ends and three planks deep in the middle, where each individual plank was 6 inches deep. These were used to create two arches, each of 190-foot span and 17-foot rise. Each arch was supported by two trusses. The planks were 18 feet long, and no piece of timber in the bridge was longer than 28 feet. The roadway was 18 feet wide. The entire bridge was restored in 1852, with the exception of the stone piers.
The bridge was designed by Thomas Codrington and Cuthbert A. Brereton for the Tweed Bridges Trust.
It is a late stone road arch bridge with four spans. The two middle arches are of 90-foot span, and the outer two of 85-foot span, and the width of the roadway between the parapets is 14 feet. The outer piers have triangular cutwaters, but the central pier has a curved cutwater that continues up to the height of the road, with a break in the parapet to create a refuge for pedestrians.
The bridge uses dressed-stone for the arch rings, and has coursed-rubble spandrels and wing walls. It is built from red sandstone, and faced with ashlar dressings. The spandrels are hollow to reduce the load on the arches, an innovation by Thomas Telford.
| ("Wikimedia Commons" has material|
about Ladykirk and Norham Bridge)
- CANMORE (RCAHMS) record of Ladykirk And Norham Bridge
- "Ladykirk and Norham Bridge". bridgesonthetyne.co.uk. http://www.bridgesonthetyne.co.uk/norham.html. Retrieved 10 September 2014.
- Report of the Commissioners for Inquiring into Matters Relating to Public Roads in Scotland. Murray and Gibb. 1859. p. 132. http://books.google.com/books?id=flE3AAAAMAAJ&pg=PA132.
- Warr, George Finden (1851). Dynamics, Construction of Machinery, Equilibrium of Structures and the Strength of Materials. Robert Baldwin. pp. 176–177. http://books.google.com/books?id=qSMJAAAAIAAJ&pg=PA176.
- "Ladykirk and Norham Bridge". sine.ncl.ac.uk. http://sine.ncl.ac.uk/view_structure_information.asp?struct_id=1438. Retrieved 9 September 2014.
- Historic Border Bridges
- "Ashford Carbonell Bridge". engineering-timelines.com. http://www.engineering-timelines.com/scripts/engineeringItem.asp?id=750. Retrieved 10 September 2014.