{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.stairs","code":"thing-stairs","url":"https://ver.cy/models/thing/stairs/","name":"stairs","alternateNames":["accommodation ladder","aerial ladder","articulated ladder","extension ladder","ladder","monkey ladder","rope ladder","scaling ladder","sea ladder","sea steps","steps","step ladder"],"kind":"thing","status":"published","version":"0.2.0-wave.1","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"noun.artifact","plane":"PHY","domain":["PHY.OBJ"],"industry":[],"navPath":"","tags":["artifact","way"],"facets":{"substance":"material","origin":"manufactured","agency":"inert","mobility":"fixed","scale":"built","affordances":["traversable"]}},"whatItIs":"A flight or series of steps allowing people to move between levels, including staircases in buildings, outdoor steps and, by extension, ladders such as extension and accommodation ladders; stairs are governed by building rules on rise, going, handrails and headroom.","purpose":"Let an agent explain stair design rules, safety and accessibility, help prevent falls, and route injuries to care.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Stepped vertical access","Regulated dimensions","Fall hazard","Barrier for some users"],"structure":{"bundles":[{"id":"design","name":"Design","description":"Dimensions.","layers":[{"id":"dimensions","name":"Dimensions","description":"Rise and going.","findings":[{"id":"dimensions-finding","name":"Dimensions","description":"Dimensions.","questions":[{"text":"Do the rise, going and headroom meet building rules here?","kind":"measurement"},{"text":"Which regulation applies?","kind":"provenance"}]}]},{"id":"handrails","name":"Handrails","description":"Guarding.","findings":[{"id":"handrails-finding","name":"Handrails","description":"Handrails and guarding.","questions":[{"text":"Are handrails and balustrades at the required height and strength?","kind":"provenance"},{"text":"Are gaps small enough for children?","kind":"boundary"}]}]}]},{"id":"safety","name":"Safety","description":"Falls.","layers":[{"id":"fall","name":"Fall","description":"After a fall.","findings":[{"id":"fall-finding","name":"Fall","description":"Falls.","questions":[{"text":"Has someone fallen down stairs and cannot move, is confused or has hit their head?","kind":"boundary"},{"text":"Should emergency services be called?","kind":"action"}]}]},{"id":"prevent","name":"Prevent","description":"Prevention.","findings":[{"id":"prevent-finding","name":"Prevent","description":"Fall prevention.","questions":[{"text":"Which measures reduce stair falls, such as lighting, handrails and non-slip edges?","kind":"provenance"},{"text":"Are stair gates needed for small children?","kind":"action"}]}]}]},{"id":"ladders","name":"Ladders","description":"Ladder safety.","layers":[{"id":"use","name":"Use","description":"Safe ladder use.","findings":[{"id":"use-finding","name":"Use","description":"Safe ladder use.","questions":[{"text":"How should a ladder be positioned and secured safely, according to guidance?","kind":"provenance"},{"text":"When is a different access method needed?","kind":"boundary"}]}]},{"id":"standard","name":"Standard","description":"Ladder standards.","findings":[{"id":"standard-finding","name":"Standard","description":"Ladder standards.","questions":[{"text":"Does the ladder meet the relevant standard and duty rating?","kind":"provenance"},{"text":"How should it be inspected?","kind":"action"}]}]}]},{"id":"access","name":"Access","description":"Accessibility.","layers":[{"id":"alternatives","name":"Alternatives","description":"Ramps and lifts.","findings":[{"id":"alternatives-finding","name":"Alternatives","description":"Accessible alternatives.","questions":[{"text":"Is there a step-free alternative such as a ramp or lift?","kind":"provenance"},{"text":"Which rules require it?","kind":"provenance"}]}]},{"id":"home","name":"Home","description":"Home adaptations.","findings":[{"id":"home-finding","name":"Home","description":"Home adaptations.","questions":[{"text":"Which home adaptations such as stairlifts or rails are available, and is funding offered?","kind":"provenance"},{"text":"Who assesses needs?","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Report damaged treads, loose handrails, poor lighting and obstructions on stairs.","Guide people to accessible alternatives such as lifts or ramps."],"mustNot":["Leave objects, cables or spills on stairs where people can trip.","Block or lock stairs that serve as an escape route.","Carry loads or operate machines on stairs in a way that endangers people using them.","Remove stair gates or guards that protect young children."],"requiresHuman":["Closing a staircase that is a fire escape route.","Altering stairs in a way that affects compliance with building rules."]},"ethics":{"considerations":["Falls on stairs are a major cause of injury and death, especially for older people and children.","Stairs exclude people who cannot climb them unless alternatives are provided."],"affectedParties":["Older people","Young children","Wheelchair users and people with limited mobility"]},"owners":{"steward":"The owner or occupier of the building; building control authorities set the rules.","roles":[],"masterSystems":[]},"relations":[{"target":"oewn-04305446-n","type":"parent","note":"registry parent class"},{"target":"building element","type":"related","note":"category"},{"target":"ramp and lift","type":"related","note":"accessible alternatives"},{"target":"building regulations","type":"related","note":"rules"},{"target":"tower block","type":"related","note":"building context"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.stairs","Open English WordNet: oewn-04305309-n"]},"properties":{"applicability":"required","items":["Vertical step spacing:  millimetres - Measure the vertical distance between successive tread surfaces or successive rung centres, according to the construction.","Clear passage width:  millimetres - Measure the unobstructed width available between the side boundaries of the stair or ladder.","Inclination:  degrees - Measure the angle of the flight or ladder relative to a horizontal plane.","Clear headroom:  millimetres - Measure the vertical clearance above the stair pitch line to the nearest overhead obstruction."]},"recognition":{"applicability":"required","items":["Treads, risers and handrails","Landings between flights","Ramps provide step-free access","Series of steps with treads, risers, handrails and landings, or rungs on ladders."]},"capabilities":{"applicability":"required","items":["check stair dimensions against building rules","improve stair and ladder safety","find accessible alternatives such as ramps and lifts","childproof stairs"]},"hazards":{"applicability":"required","items":["Falls, especially among older people and children","Ladder accidents","Inaccessible buildings"]},"interfaces":{"applicability":"required","items":["National building regulations on stairs","Accessibility standards","EN 131 ladder standard"]},"context":{"applicability":"required","items":["Vertical movement between levels.","straight and turning staircases","spiral stairs","outdoor steps","escape stairs","ladders (extended sense)"]}},"sources":[{"title":"Open English WordNet 2024, synset oewn-04305309-n","url":"https://en-word.net/id/oewn-04305309-n","note":"sense and gloss of the concept"},{"title":"Wiktionary: stairs","url":"https://en.wiktionary.org/wiki/stairs","note":"word senses and usage"}],"openQuestions":["Should ladders be a separate entry?","How should building rules be localised?","How should fall prevention guidance be linked?"],"resources":{"spec":"/models/things/publications/thing-stairs/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-stairs/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-11T14:17:01Z","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 2026-10-07T12:16:35+00:00: completeness 1.00; sense: WordNet gloss; 2 live sources; review by codex: pass"},"score":1.0}}