Telford Road Construction : With Features & Figure

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Telford Road Construction was proposed and implemented by Scottish Civil Engineer Thomas Telford (1757 – 1834 AD), the founder & first president of the Institution of Civil Engineers (ICE) in London, who began road construction in the early 19th century.

✔ He believed in using a heavy foundation above the soil subgrade to keep the road foundation formed. He also insisted on providing a definite cross slope for the pavement’s top surface by varying the foundation stones’ thickness.

✔ He proposed providing cross drains at an interval of almost 90m, usually laid below the foundation level.

 


 

1. What were the features of Telford Road Construction?

Some of the features of Telford Road Construction are:

a. Stones of varying sizes (17 – 22 cm ) were utilized to make the road foundation.

b. Above this layer, angular broken stones of 7 cm size and 10 cm thickness were used in the central area, and broken stones along with lime mortar were used at the sides.

c. Generally, a wearing surface with a slope of 1 in 45 and thickness of 4 cm was constructed using pebels.

d. Cross drains were provided at an interval of almost 90m, usually laid below the foundation level.

 

 


 

2. How were Telford Roads constructed?

✔ To construct Telford Road, the initial step was to prepare the subgrade, which was the layer of soil where the road was built.

✔ Then, the foundation layer was built with large stones ranging from 17 to 22 centimeters in size, which were meticulously hand-packed for a secure fit.

✔ Following this, the intermediate layer, consisting of angular broken stones of 7 cm in size and 10 cm in thickness, was used in the central area, and broken stones along with lime mortar were used at the sides.

✔ The wearing surface composed of broken stones, which was the top layer of the road, was then applied, with a slope of 1 in 45 and a thickness of 4 cm.

 


 

3. Was Telford Involved in the Design of Bridges Also? 

Besides roads, he was also involved in the design of the following bridges & aqueducts stated below:

YearName / Location
1792Montford Bridge
1796Buildwas Bridge
1796Longdon-on-Tern Aqueduct
1797Coundarbour Bridge
1798Bewdley Bridge
1801Chirk Aqueduct
1805Pontcysyllte Aqueduct
1806Glen Loy Aqueduct, Caledonian Canal
1808Tongland Bridge
1809Dunkeld Bridge
1810Bridgnorth Bridge
1811Helmsdale Bridge
1812Bonar Bridge
1813Telford Bridge, Invermoriston
1815Craigellachie Bridge
1815Dunans Bridge
1815Waterloo Bridge, Betws-y-Coed
1818Sligachan Old Bridge
1819Bannockburn Bridge
1820Cantlop Bridge
1823Stanley Embankment
1824Eaton Hall Bridge
1826Conwy Suspension Bridge
1826Menai Suspension Bridge
1826Mythe Bridge
1827Holt Fleet Bridge
1827Over Bridge
1827Bridge of Keig
1829Galton Bridge
1831Dean Bridge, Edinburgh
1831Lothian Bridge, Pathhead
1832Broomielaw Bridge, Glasgow

 

Read Also: Ancient Roman Roads
Verified Article By Er. Madhu Krishna Poudel
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