{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.bleacher-q2067349","code":"thing-q2067349","url":"https://ver.cy/models/thing/q2067349/","name":"bleacher","alternateNames":["choir stands","main grandstand","theatron"],"kind":"thing","status":"published","version":"0.2.0-wave.3","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 raised tiered structure of seating for spectators, from simple open benches at sports fields to grandstands with roofs and main grandstands at stadiums and racecourses, and the ancient theatron of Greek theatres; bleachers may be permanent, portable or telescopic, and are governed by safety codes for loads, guards and egress.","purpose":"Let an agent explain bleachers and grandstands and their kinds, relay safety codes and design from building and event sources, describe historical spectator seating forms, and distinguish bleachers from stadium stands and seating in general.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Tiered structure","Open or covered","Portable and telescopic forms","Safety regulation"],"structure":{"bundles":[{"id":"understand","name":"Understand","description":"What bleachers are.","layers":[{"id":"definition","name":"Definition","description":"Definition and kinds.","findings":[{"id":"definition-finding","name":"Definition","description":"Definition.","questions":[{"text":"What are bleachers and grandstands, and how do open, covered, portable and telescopic forms differ?","kind":"definition"},{"text":"Is the question about spectator bleachers, choir stands or the ancient theatron?","kind":"boundary"}]}]},{"id":"forms","name":"Forms","description":"Performance and historical forms.","findings":[{"id":"forms-finding","name":"Forms","description":"Forms.","questions":[{"text":"What are choir stands and risers, and how did the Greek theatron seat audiences?","kind":"definition"},{"text":"Which entry fits the specific form?","kind":"action"}]}]}]},{"id":"design","name":"Design","description":"Design and safety.","layers":[{"id":"codes","name":"Codes","description":"Safety codes.","findings":[{"id":"codes-finding","name":"Codes","description":"Codes.","questions":[{"text":"What do ICC 300 and other codes require for loads, guards, aisles and egress?","kind":"provenance"},{"text":"Which references are standard?","kind":"provenance"}]}]},{"id":"inspection","name":"Inspection","description":"Inspection.","findings":[{"id":"inspection-finding","name":"Inspection","description":"Inspection.","questions":[{"text":"How are bleachers inspected and maintained, and what caused notable collapses?","kind":"provenance"},{"text":"Which entry fits stadium safety?","kind":"action"}]}]}]},{"id":"use","name":"Use","description":"Use.","layers":[{"id":"venues","name":"Venues","description":"Venues.","findings":[{"id":"venues-finding","name":"Venues","description":"Venues.","questions":[{"text":"How are bleachers and grandstands used at sports grounds, racecourses, schools and events?","kind":"provenance"},{"text":"Which sources are cited?","kind":"provenance"}]}]},{"id":"temporary","name":"Temporary","description":"Temporary stands.","findings":[{"id":"temporary-finding","name":"Temporary","description":"Temporary.","questions":[{"text":"How are temporary grandstands erected and certified for events?","kind":"provenance"},{"text":"Which entry fits temporary structure?","kind":"action"}]}]}]},{"id":"context","name":"Context","description":"History and culture.","layers":[{"id":"history","name":"History","description":"History.","findings":[{"id":"history-finding","name":"History","description":"History.","questions":[{"text":"How did tiered seating develop from Greek and Roman theatres to modern grandstands?","kind":"provenance"},{"text":"Which entry fits the history of stadiums?","kind":"action"}]}]},{"id":"culture","name":"Culture","description":"Culture.","findings":[{"id":"culture-finding","name":"Culture","description":"Culture.","questions":[{"text":"What is the cultural place of the bleachers in school sport and American life?","kind":"provenance"},{"text":"Which entry fits sports culture?","kind":"action"}]}]}]}]},"agentConduct":{"may":["Describe types of bleachers and the safety codes that govern them.","Report inspection status and capacity limits from the venue operator.","Monitor crowd numbers against a stand's capacity for an operator who authorises it."],"mustNot":["Approve a temporary stand as safe in place of a qualified inspector.","Advise overcrowding a stand or ignoring its capacity.","Suppress reports of loose boards, missing guards or structural damage.","Encourage people to stand on rails or climb the structure."],"requiresHuman":["Deciding to open, close or evacuate a stand."]},"ethics":{"considerations":["Stand collapses and crowd crushes have killed many spectators.","Children fall through gaps in poorly guarded bleachers."],"affectedParties":["Spectators","Children","Venue staff"]},"owners":{"steward":"The venue owner or operator; building authorities approve the structure.","roles":[],"masterSystems":[]},"relations":[{"target":"Q22079390","type":"parent","note":"registry parent class"},{"target":"platform","type":"related","note":"in registry terms"},{"target":"stadium","type":"related","note":"and sports venues"},{"target":"theatron","type":"related","note":"of ancient Greek theatres"},{"target":"building code","type":"related","note":"for safety"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.bleacher-q2067349","Wikidata: Q2067349 (https://www.wikidata.org/wiki/Q2067349)"]},"properties":{"applicability":"required","items":["design live load: about 5 kN/m^2 - typical codes","theatre of Epidaurus capacity: about 14000 seats"]},"recognition":{"applicability":"required","items":["Bleachers provide tiered spectator seating.","Spectator seating forms include open bleachers, grandstands, main grandstands, telescopic bleachers and theatron seating.","Stadium bowls are integrated, auditorium seating is enclosed, and a podium is for speakers.","Rows of tiered benches or seats rising away from a field or stage."]},"capabilities":{"applicability":"required","items":["explain kinds","relay safety codes","describe historical forms","distinguish from other seating"]},"hazards":{"applicability":"required","items":["Collapse of temporary or poorly maintained stands","Falls through gaps and from heights","Crowd crushes at overcrowded stands"]},"interfaces":{"applicability":"required","items":["ICC 300 standard for bleachers and grandstands","National building and event safety codes","Guide to Safety at Sports Grounds in the UK","Accessibility requirements"]},"context":{"applicability":"required","items":["Seating spectators or performers in tiers.","open bleachers at school and community fields","grandstands and main grandstands at stadiums and racecourses","telescopic and portable bleachers in gyms and halls","choir stands and risers","the theatron of ancient theatres","temporary event grandstands"]}},"sources":[{"title":"Wikidata item Q2067349: bleacher","url":"https://www.wikidata.org/wiki/Q2067349","note":"identity and sense of the item"},{"title":"Wikipedia: Bleacher","url":"https://en.wikipedia.org/wiki/Bleacher","note":"general description of the item"}],"openQuestions":["Should grandstand and theatron be separate primary entries?","How should safety codes be linked?","The registry entry has merged aliases naming performer stands and ancient forms; should they be split off?"],"resources":{"spec":"/models/things/publications/thing-q2067349/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q2067349/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-13T03:52:47Z","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 2026-10-07T10:10:28+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}