{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.train-shed","code":"thing-q801716","url":"https://ver.cy/models/thing/q801716/","name":"train shed","alternateNames":[],"kind":"thing","status":"published","version":"0.2.0-wave.5","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"thing","plane":"PHY","domain":["PHY.BLT"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"A large roof, often with an arched or trussed iron and glass structure, covering the tracks and platforms of a railway station; characteristic of major 19th-century terminals.","purpose":"Let an agent describe train sheds by structure, history and heritage status, and point to maintenance and safety rules.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Covers tracks and platforms, unlike platform canopies covering only platforms.","Not an engine shed, which houses locomotives for maintenance.","Steam-era sheds needed ventilation for smoke."],"structure":{"bundles":[{"id":"structure","name":"Structure","description":"How it is built.","layers":[{"id":"type","name":"Type","description":"Arched, ridged, multi-span.","findings":[{"id":"structural-type","name":"Structural type","description":"Type and materials.","questions":[{"text":"What structural type is it?","kind":"definition"},{"text":"Which materials?","kind":"provenance"}]}]},{"id":"dimensions","name":"Dimensions","description":"Span and length.","findings":[{"id":"dimensions","name":"Dimensions","description":"Span, length, height.","questions":[{"text":"What are its span and length?","kind":"measurement"},{"text":"From which source?","kind":"provenance"}]}]}]},{"id":"history","name":"History","description":"Design and building.","layers":[{"id":"design","name":"Design","description":"Engineers and dates.","findings":[{"id":"design-history","name":"Design history","description":"Designer and year.","questions":[{"text":"Who designed it and when?","kind":"provenance"},{"text":"Has it been altered?","kind":"provenance"}]}]},{"id":"station","name":"Station","description":"Station context.","findings":[{"id":"station","name":"Station","description":"Station and line.","questions":[{"text":"Which station is it part of?","kind":"provenance"},{"text":"Which lines use it?","kind":"provenance"}]}]}]},{"id":"condition","name":"Condition","description":"Maintenance and safety.","layers":[{"id":"condition","name":"Condition","description":"Inspections.","findings":[{"id":"condition","name":"Condition","description":"Assessment and date.","questions":[{"text":"What is its condition?","kind":"provenance"},{"text":"When was it last inspected?","kind":"provenance"}]}]},{"id":"works","name":"Works","description":"Repairs and restoration.","findings":[{"id":"works","name":"Works","description":"Project and dates.","questions":[{"text":"Which works were done?","kind":"provenance"},{"text":"When?","kind":"provenance"}]}]}]},{"id":"heritage","name":"Heritage","description":"Protection.","layers":[{"id":"listing","name":"Listing","description":"Status.","findings":[{"id":"listing","name":"Listing","description":"Status and grade.","questions":[{"text":"Is it listed or protected?","kind":"provenance"},{"text":"At what grade?","kind":"provenance"}]}]},{"id":"significance","name":"Significance","description":"Why it matters.","findings":[{"id":"significance","name":"Significance","description":"Reasons.","questions":[{"text":"Why is it significant?","kind":"provenance"},{"text":"Which source says so?","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["describe structures and history"],"mustNot":["give structural safety judgements without engineers"],"requiresHuman":["structural assessments by engineers"]},"ethics":{"considerations":["heritage conservation","passenger safety"],"affectedParties":["passengers","staff"]},"owners":{"steward":"the station's infrastructure owner","roles":[],"masterSystems":["asset registers","heritage lists"]},"relations":[{"target":"Q39917125","type":"parent","note":"registry parent class"},{"target":"railway station","type":"related","note":"building"},{"target":"engine shed","type":"related","note":"maintenance building"},{"target":"platform canopy","type":"related","note":"smaller roof"},{"target":"listed building","type":"related","note":"heritage"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.train-shed","Wikidata: Q801716 (https://www.wikidata.org/wiki/Q801716)","heritage list entry: register-specific"]},"properties":{"applicability":"required","items":["clear span of notable single-span sheds: about 73-92 m - St Pancras about 73.2 m; Philadelphia's former Broad Street shed about 91.6 m"]},"recognition":{"applicability":"required","items":["Arched iron and glass roof over platforms","Forms range from high arched or ridged roofs of iron or steel with glazing, spanning several tracks, to low modular Bush-type roofs with smoke openings above the tracks."]},"capabilities":{"applicability":"required","items":["describe structural types","describe notable examples and history","explain heritage protection","explain ventilation and maintenance issues"]},"hazards":{"applicability":"required","items":["Falling glass and corrosion","Roof collapse","Poor air quality with diesel trains"]},"interfaces":{"applicability":"required","items":["National heritage protection law for listed stations","Structural design codes such as Eurocodes for new sheds","Railway station safety rules"]},"context":{"applicability":"required","items":["Sheltering passengers, platforms and trains from weather.","single-span arched train shed","multi-span train shed","balloon shed","Bush-type shed"]}},"sources":[{"title":"Q801716","url":"https://www.wikidata.org/wiki/Q801716","note":"identity of the registry item, labels and sitelinks"},{"title":"Train shed","url":"https://en.wikipedia.org/wiki/Train_shed","note":"general description of the subject"},{"title":"St Pancras Station and Former Midland Grand Hotel","url":"https://historicengland.org.uk/listing/the-list/list-entry/1342037?section=official-list-entry","note":"Train-shed structure, 240 ft clear span, nineteenth-century history and Grade I listing."},{"title":"Philadelphia and Reading Railroad: Terminal Station and Trainshed - National Register nomination","url":"https://npgallery.nps.gov/GetAsset/4610585f-2c0a-40f2-8419-5971375b3c70/","note":"Reading Terminal's 259 ft 8 in span and Broad Street Station's larger 300 ft 8 in span."},{"title":"Erie-Lackawanna Terminal, Hoboken - National Register documentation","url":"https://npgallery.nps.gov/NRHP/GetAsset/05a8d18f-5c83-4ae4-88f7-88d783b042ea","note":"Bush-type and balloon-type sheds, structural form, ventilation and historical significance."}],"openQuestions":[],"resources":{"spec":"/models/things/publications/thing-q801716/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q801716/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-10-21T20:28:28Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"filled","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-21T20:32:19+00:00: completeness 1.00; sense: Wikidata description; 4 live sources; review by codex: pass"},"score":1.0}}