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Statements

Subject Item
dbr:Roving_bridge
rdf:type
yago:Whole100003553 yago:YagoPermanentlyLocatedEntity dbo:Bridge yago:Object100002684 yago:Bridge102898711 yago:Watercourse104559275 yago:Canal102947212 yago:WikicatBridgesByModeOfTraffic yago:WikicatCanals yago:Structure104341686 yago:PhysicalEntity100001930 yago:YagoGeoEntity yago:Way104564698 yago:Artifact100021939
rdfs:label
移動橋 Roving bridge
rdfs:comment
A roving bridge, changeline bridge, turnover bridge, or snake bridge is a bridge over a canal constructed to allow a horse towing a boat to cross the canal when the towpath changes sides. This often involved unhitching the tow line, but on some canals they were constructed so that there was no need to do this by placing the two ramps on the same side of the bridge (see middle photo), which turned the horse through 360 degrees. On the Macclesfield Canal this was achieved by building spiral ramps and on the Stratford-upon-Avon Canal and others by constructing roving bridges of iron in two cantilevered halves, leaving a slot in the middle for the tow rope. This was also called a split bridge. For cost reasons many ordinary Stratford bridges were also built in this way as they had no towpath. 移動橋（いどうきょう）とは運河における曳舟道が運河を渡る場所に設けられる橋のことである。通常の橋のように単にZ字状に運河を渡る形では、船が橋を通過する際に曳舟のために用いるロープを一旦解く必要が発生する。橋のいずれかの側の曳舟道をらせん状にすることによりこの問題を解消したものが移動橋である。
foaf:depiction
n8:Bridge_29_Macclesfield_Canal.jpg n8:Roving_bridge.svg n8:Roving_bridges_at_Smethwick_Junction.jpg n8:Split_bridge_Spon_Lane_top_lock_2.jpg
dct:subject
dbc:Water_transport_infrastructure dbc:Bridges_by_mode_of_traffic dbc:Canals
dbo:wikiPageID
11221174
dbo:wikiPageRevisionID
1118604618
dbo:wikiPageWikiLink
dbr:Canals_of_the_United_Kingdom dbr:Towpath dbr:Stratford-upon-Avon_Canal n9:Bridge_29_Macclesfield_Canal.jpg dbc:Water_transport_infrastructure n9:Roving_bridges_at_Smethwick_Junction.jpg dbr:Spiral_bridge dbr:Macclesfield_Canal n9:Split_bridge_Spon_Lane_top_lock_2.jpg dbr:History_of_the_British_canal_system dbr:Cantilever dbr:Haywood_Junction dbc:Bridges_by_mode_of_traffic dbr:Hawkesbury_Junction dbc:Canals n9:Roving_bridge.svg dbr:Birmingham_Canal_Navigations dbr:Mule_ramp
owl:sameAs
freebase:m.02r42pp yago-res:Roving_bridge dbpedia-ja:移動橋 wikidata:Q7371728 n21:4v6Pk
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dbo:thumbnail
n8:Roving_bridge.svg?width=300
dbo:abstract
移動橋（いどうきょう）とは運河における曳舟道が運河を渡る場所に設けられる橋のことである。通常の橋のように単にZ字状に運河を渡る形では、船が橋を通過する際に曳舟のために用いるロープを一旦解く必要が発生する。橋のいずれかの側の曳舟道をらせん状にすることによりこの問題を解消したものが移動橋である。 A roving bridge, changeline bridge, turnover bridge, or snake bridge is a bridge over a canal constructed to allow a horse towing a boat to cross the canal when the towpath changes sides. This often involved unhitching the tow line, but on some canals they were constructed so that there was no need to do this by placing the two ramps on the same side of the bridge (see middle photo), which turned the horse through 360 degrees. On the Macclesfield Canal this was achieved by building spiral ramps and on the Stratford-upon-Avon Canal and others by constructing roving bridges of iron in two cantilevered halves, leaving a slot in the middle for the tow rope. This was also called a split bridge. For cost reasons many ordinary Stratford bridges were also built in this way as they had no towpath. Bridges were also necessary at canal junctions and where the towpath was interrupted by side arms. These are strictly speaking side bridges, but they are often referred to as roving bridges. Well-known ones occur at Hawkesbury Junction and Haywood Junction. The Birmingham Canal Navigations has many examples, mainly of cast iron, which took the towpaths across factory arms. The ramps of the bridge are typically studded with alternating rows of protruding bricks to prevent the feet of the horse from sliding. The bridge may be constructed of cast iron (particularly in industrial areas) or of more conventional brick or stone.
gold:hypernym
dbr:Bridge
prov:wasDerivedFrom
wikipedia-en:Roving_bridge?oldid=1118604618&ns=0
dbo:wikiPageLength
3429
foaf:isPrimaryTopicOf
wikipedia-en:Roving_bridge