{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.stair-towers","code":"thing-q2451773","url":"https://ver.cy/models/thing/q2451773/","name":"stair towers","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 tower-like wing or projection of a building that contains a staircase, often as a distinct architectural element on the facade, as in Renaissance castles and town houses; also a modern fire-escape stair core.","purpose":"Let an agent describe stair towers by period, form and function, and point to heritage and fire safety sources.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Projects from the main building as its own volume.","Spiral staircases are typical in historic examples.","Modern stair towers may be enclosed protected escape routes."],"structure":{"bundles":[{"id":"tower","name":"Tower","description":"Which stair tower.","layers":[{"id":"building","name":"Building","description":"Location.","findings":[{"id":"building","name":"Building","description":"Name and place.","questions":[{"text":"Which building is it part of?","kind":"provenance"},{"text":"Where?","kind":"provenance"}]}]},{"id":"period","name":"Period","description":"Date and style.","findings":[{"id":"period","name":"Period","description":"Date and style.","questions":[{"text":"When was it built?","kind":"provenance"},{"text":"In which style?","kind":"provenance"}]}]}]},{"id":"form","name":"Form","description":"Architecture.","layers":[{"id":"shape","name":"Shape","description":"Plan and height.","findings":[{"id":"shape","name":"Shape","description":"Plan and storeys.","questions":[{"text":"What plan shape?","kind":"provenance"},{"text":"How many storeys?","kind":"measurement"}]}]},{"id":"stair","name":"Stair","description":"Stair type.","findings":[{"id":"stair","name":"Stair","description":"Type.","questions":[{"text":"What kind of staircase?","kind":"provenance"},{"text":"Which direction does it turn?","kind":"provenance"}]}]}]},{"id":"function","name":"Function","description":"Use.","layers":[{"id":"circulation","name":"Circulation","description":"Access.","findings":[{"id":"circulation","name":"Circulation","description":"Floors served.","questions":[{"text":"Which floors does it serve?","kind":"provenance"},{"text":"Is it the main stair?","kind":"provenance"}]}]},{"id":"escape","name":"Escape","description":"Fire role.","findings":[{"id":"escape-role","name":"Escape role","description":"Rule.","questions":[{"text":"Is it a protected escape route?","kind":"provenance"},{"text":"Under which code?","kind":"provenance"}]}]}]},{"id":"heritage","name":"Heritage","description":"Protection.","layers":[{"id":"listing","name":"Listing","description":"Status.","findings":[{"id":"listing","name":"Listing","description":"Status.","questions":[{"text":"Is it protected?","kind":"provenance"},{"text":"By whom?","kind":"provenance"}]}]},{"id":"conservation","name":"Conservation","description":"Works.","findings":[{"id":"conservation","name":"Conservation","description":"Works.","questions":[{"text":"Which works were done?","kind":"provenance"},{"text":"When?","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["describe architecture and examples"],"mustNot":["assess fire safety compliance"],"requiresHuman":["fire safety assessments by qualified professionals"]},"ethics":{"considerations":["heritage","safety"],"affectedParties":["occupants","visitors"]},"owners":{"steward":"the owner of each building","roles":[],"masterSystems":["heritage registers"]},"relations":[{"target":"Q56052926","type":"parent","note":"registry parent class"},{"target":"building","type":"related","note":"architecture"},{"target":"staircase","type":"contains","note":"element"},{"target":"turret","type":"related","note":"smaller tower"},{"target":"listed building","type":"related","note":"heritage"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.stair-towers","Wikidata: Q2451773 (https://www.wikidata.org/wiki/Q2451773)","heritage list entry: register-specific"]},"properties":{"applicability":"not-applicable","items":[]},"recognition":{"applicability":"required","items":["Tower projecting from a facade with staircase windows following the stair","A projecting tower, often polygonal or round, containing a spiral or straight staircase."]},"capabilities":{"applicability":"required","items":["describe form and period","describe notable examples","explain fire safety roles of modern stair towers","describe heritage status"]},"hazards":{"applicability":"required","items":["Falls on steep spiral stairs","Smoke spread without protection"]},"interfaces":{"applicability":"required","items":["Building and fire safety codes for escape stairs","Heritage protection law"]},"context":{"applicability":"required","items":["Providing vertical circulation, often with architectural prominence.","Renaissance stair tower (Treppenturm)","spiral stair turret","modern escape stair tower"]}},"sources":[{"title":"Q2451773","url":"https://www.wikidata.org/wiki/Q2451773","note":"identity of the registry item, labels and sitelinks"},{"title":"Listed Building: Lendal Tower","url":"https://her.york.gov.uk/Designation/DYO641","note":"Projecting circular stair tower, spiral staircase, windows and heritage designation."},{"title":"Scotstarvit Tower: History and stories","url":"https://www.historicenvironment.scot/visit/all/scotstarvit-tower/history-and-stories/","note":"Historic tower architecture with a spiral staircase occupying a smaller building wing."},{"title":"Fire safety: Approved Document B","url":"https://www.gov.uk/government/publications/fire-safety-approved-document-b?trk=public_post_comment-text","note":"Protected escape stairs, enclosure and fire safety requirements in England."}],"openQuestions":[],"resources":{"spec":"/models/things/publications/thing-q2451773/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q2451773/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-10-21T21:31:16Z","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":"not-applicable","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 2026-10-22T10:59:06+00:00: completeness 1.00; sense: Wikidata description; 3 live sources; review by codex: pass","interaction.properties":"Stair towers vary; dimensions belong to each building."},"score":1.0}}