Suspension Footbridge over the River Wye - geograph

Sellack Suspension Bridge Detail - geograph

Louis Harper (23 April 1868 – 26 January 1940) was a

civil engineer A civil engineer is a person who practices civil engineering – the application of planning, designing, constructing, maintaining, and operating infrastructure while protecting the public and environmental health, as well as improving existing i ...

from the north-east of

Scotland Scotland is a Countries of the United Kingdom, country that is part of the United Kingdom. It contains nearly one-third of the United Kingdom's land area, consisting of the northern part of the island of Great Britain and more than 790 adjac ...

who designed a number of

suspension Suspension or suspended may refer to: Science and engineering * Car suspension * Cell suspension or suspension culture, in biology * Guarded suspension, a software design pattern in concurrent programming suspending a method call and the calling ...

footbridge A footbridge (also a pedestrian bridge, pedestrian overpass, or pedestrian overcrossing) is a bridge designed solely for pedestrians.''Oxford English Dictionary'' While the primary meaning for a bridge is a structure which links "two points at a ...

s towards the end of the 19th century. Harper was born in

Aberdeen Aberdeen ( ; ; ) is a port city in North East Scotland, and is the List of towns and cities in Scotland by population, third most populous Cities of Scotland, Scottish city. Historically, Aberdeen was within the historic county of Aberdeensh ...

, Aberdeenshire, to John Harper and Margaret Ross. His father came from

Turriff Turriff () is a town and civil parish in Aberdeenshire in Scotland. It lies on the River Deveron, about above sea level, and has a population of 5,708. In everyday speech it is often referred to by its Scots name ''Turra'', which is deriv ...

Aberdeenshire Aberdeenshire (; ) is one of the 32 Subdivisions of Scotland#council areas of Scotland, council areas of Scotland. It takes its name from the Shires of Scotland, historic county of Aberdeenshire (historic), Aberdeenshire, which had substantial ...

, and worked as a fencer in

Edinburgh Edinburgh is the capital city of Scotland and one of its 32 Council areas of Scotland, council areas. The city is located in southeast Scotland and is bounded to the north by the Firth of Forth and to the south by the Pentland Hills. Edinburgh ...

and

Glasgow Glasgow is the Cities of Scotland, most populous city in Scotland, located on the banks of the River Clyde in Strathclyde, west central Scotland. It is the List of cities in the United Kingdom, third-most-populous city in the United Kingdom ...

before starting the family firm in Aberdeen in 1856, which became Harpers Ltd in 1885. John Harper patented a mechanism for straining

wire file:Sample cross-section of high tension power (pylon) line.jpg, Overhead power cabling. The conductor consists of seven strands of steel (centre, high tensile strength), surrounded by four outer layers of aluminium (high conductivity). Sample d ...

, used both to make

fence A fence is a structure that encloses an area, typically outdoors, and is usually constructed from posts that are connected by boards, wire, rails or net (textile), netting. A fence differs from a wall in not having a solid foundation along its ...

s and later also for the

cable Cable may refer to: Mechanical * Nautical cable, an assembly of three or more ropes woven against the weave of the ropes, rendering it virtually waterproof * Wire rope, a type of rope that consists of several strands of metal wire laid into a hel ...

s of bridges. His son John took charge of the business until 1887, while his second son Louis served an apprenticeship with Jenkins & Mar, Civil Engineers. Louis set up his own firm in 1889, later collaborating with the contractors James Abernethy & Co. In addition to his bridge projects, he assisted Aberdeen Council in surveying their town water scheme. He became an Associate Member of the

Institution of Civil Engineers The Institution of Civil Engineers (ICE) is an independent professional association for civil engineers and a Charitable organization, charitable body in the United Kingdom. Based in London, ICE has over 92,000 members, of whom three-quarters ar ...

in 1893, resigning in 1921. The firm's early bridges included suspension bridges at

Aboyne Aboyne (, ) is a village on the edge of the Scottish Highlands, Highlands in Aberdeenshire, Scotland, on the River Dee, Aberdeenshire, River Dee, approximately west of Aberdeen. It has a swimming pool at Aboyne Academy, all-weather tennis cou ...

, spanning , and at Shocklach in

Cheshire Cheshire ( ) is a Ceremonial counties of England, ceremonial county in North West England. It is bordered by Merseyside to the north-west, Greater Manchester to the north-east, Derbyshire to the east, Staffordshire to the south-east, and Shrop ...

, both built in 1871. Neither bridge exists today. The early bridges had wooden towers, although these were replaced in later bridges by

structural steel Structural steel is steel used for making construction materials in a variety of shapes. Many structural steel shapes take the form of an elongated beam having a profile of a specific cross section (geometry), cross section. Structural steel sha ...

cast iron Cast iron is a class of iron–carbon alloys with a carbon content of more than 2% and silicon content around 1–3%. Its usefulness derives from its relatively low melting temperature. The alloying elements determine the form in which its car ...

members. He died in Aberdeen in 1940.''England & Wales, National Probate Calendar (Index of Wills and Administrations), 1858-1966, 1973-1995''

Later bridges

Monymusk Monymusk () is a planned village in the Marr area of Aberdeenshire, Scotland. History Malcolm Canmore first established Celtic foundation on the site in 1078 The Culdees of Munimusc are recorded as inhabiting the site in 1170. Monymusk Pri ...

, 1879 over the

River Don, Aberdeenshire The River Don () is a river in north-east Scotland. It rises in the Grampians and flows eastwards, through Aberdeenshire, to the North Sea at Aberdeen. The Don passes through Alford, Kemnay, Inverurie, Kintore, and Dyce. Its main tributary ...

, span *Burnhervie, circa 1880, near

Kemnay Kemnay may refer to: * Kemnay, Manitoba, a community in Canada *Kemnay, Aberdeenshire Kemnay (Scottish Gaelic language, Gaelic: ''Camnaidh'') is a village west of Aberdeen in Garioch, Aberdeenshire, Scotland. History The village name ''Kemna ...

, collapsed 1979 *

Birkhall Birkhall (from the Scots ''Birk Hauch'': "Birch River-meadow") is a estate on Royal Deeside, Aberdeenshire, Scotland, owned by King Charles III. It is located alongside the River Muick to the south-west of Ballater. History The property w ...

, 1880,

Royal Deeside The River Dee () is a river in Aberdeenshire, Scotland. It source (river), rises in the Cairngorms and flows through southern Aberdeenshire to reach the North Sea at Aberdeen. The area it passes through is known as Deeside, or Royal Deeside in ...

, span *

Cromdale Cromdale (, from ''crom'' 'crooked' and ''dal'' 'valley, dale') is a village in Strathspey, in the Highland council area of Scotland, and one of the ancient parishes which formed the combined ecclesiastical (later civil) parish of Cromdale, ...

, 1881 over the

River Spey The River Spey () is a river in the northeast of Scotland. At it is the ninth longest river in the United Kingdom and the third longest and fastest-flowing river in Scotland. It is an important location for the traditions of salmon fishing an ...

, collapsed and replaced by road bridge in 1922 *

Nairn Nairn (; ) is a town and former royal burgh in the Highland (council area), Highland Council council areas of Scotland, area of Scotland. It is an ancient fishing port and market town around east of Inverness, at the point where the River Nair ...

, 1887, first bridge by Louis Harper *Crathorne Hall, 1888, span, collapsed 1930 in flood *

Bandon, County Cork Bandon (; ) is a town in County Cork, Republic of Ireland, Ireland. It lies on the River Bandon between two hills. The name in Irish means 'Bridge of the Bandon', a reference to the origin of the town as a crossing point on the river. In 2004 Ba ...

, 1890, span *

Larbert Larbert (, ) is a town in the Falkirk (council area), Falkirk council area of Scotland. The town lies in the Forth Valley above the River Carron (Forth), River Carron which flows from the west. Larbert is from the shoreline of the Firth of Fo ...

, 1893 over the River Carron, span *Feugh, 1893 near

Banchory Banchory (, , ) is a burgh or town in Aberdeenshire, historically in Kincardineshire, Scotland. It is about west of Aberdeen, near where the Feugh River meets the River Dee. Prehistory and archaeology In 2009, a farmer discovered a short ...

Trentham, Staffordshire Trentham () is a suburb of the city of Stoke-on-Trent in North Staffordshire, England, south-west of the city centre and south of the neighbouring town of Newcastle-under-Lyme. It is separated from the main urban area by open space and by the Tre ...

, 1893, span, replaced in 1930s *

Grimsby Grimsby or Great Grimsby is a port town in Lincolnshire, England with a population of 86,138 (as of 2021). It is located near the mouth on the south bank of the Humber that flows to the North Sea. Grimsby adjoins the town of Cleethorpes dir ...

, 1894, three bridges *Sellack Boat, 1895, near

Ross-on-Wye Ross-on-Wye is a market town and civil parish in Herefordshire, England, near the border with Wales. It had a population estimated at 10,978 in 2021. It lies in the south-east of the county, on the River Wye and on the northern edge of the Fore ...

Doveridge Doveridge is a village and civil parish in Derbyshire, United Kingdom, near the border with Staffordshire and about east of Uttoxeter. Its name may come from its having a bridge over the river Dove (i.e. Dove(B)ridge), a tributary of the River ...

, 1898, replaced by a bridge by David Rowell & Co. *

Keswick, Cumbria Keswick ( ) is a market town and civil parishes in England, civil parish in the Cumberland (unitary authority), Cumberland unitary authority area of Cumbria, England. It lies within the Lake District National Park, just north of Derwentwater an ...

, 1898 over River Greta, demolished 1979 *

Narva Narva is a municipality and city in Estonia. It is located in the Ida-Viru County, at the Extreme points of Estonia, eastern extreme point of Estonia, on the west bank of the Narva (river), Narva river which forms the Estonia–Russia border, E ...

Estonia Estonia, officially the Republic of Estonia, is a country in Northern Europe. It is bordered to the north by the Gulf of Finland across from Finland, to the west by the Baltic Sea across from Sweden, to the south by Latvia, and to the east by Ru ...

, circa 1898, span *

Newquay Newquay ( ; ) is a town on the north coast in Cornwall, England, United Kingdom. It is a civil parishes in England, civil parish, seaside resort, regional centre for aerospace industries with an airport and a spaceport, and a fishing port on t ...

, 1900, about span *Chundra Bridge, Chovar Gorge,

Nepal Nepal, officially the Federal Democratic Republic of Nepal, is a landlocked country in South Asia. It is mainly situated in the Himalayas, but also includes parts of the Indo-Gangetic Plain. It borders the Tibet Autonomous Region of China Ch ...

, June 1903 (No longer in use) * Sundari Footbridge, Nepal, in current use (2017) A number of other bridges are proposed as having been designed by Louis Harper at the Harper Bridges website, although in the absence of clear documentary evidence, they are not listed above.

References

*River, Railway and Ravine; foot suspension bridges for Empire. Douglas Harper 2015, The History Press 164pp.

External links

Harper Bridges
{{DEFAULTSORT:Harper, Louis 1868 births 1940 deaths Engineers from Aberdeen British bridge engineers Scottish civil engineers