{ "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-11T14:17:01Z", "providers": [ "Claude" ], "breadth": "written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify", "pass": 2, "wave": 1, "engine": "claude", "enrichment": { "pass": 3, "engine": "claude", "producedAt": "2026-10-05T17:00:00Z", "ingestedAt": "2026-10-05T13:28:45+00:00", "fields": [ "agent_conduct", "ethics", "owners" ] }, "gate": { "passed": true, "version": "1.0", "at": "2026-10-07T12:16:35+00:00", "evidence": [ "completeness 1.00", "sense: WordNet gloss", "2 live sources", "review by codex: pass" ] } }, "metaModel": { "id": "THING-STAIRS", "registryId": "vr.tr.stairs", "name": "stairs", "version": "0.2.0-wave.1", "entryKind": "thing", "family": "Thing Registry", "domain": [ "PHY.OBJ" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/stairs/", "model": { "registry_id": "vr.tr.stairs", "name": "stairs", "purpose": "Let an agent explain stair design rules, safety and accessibility, help prevent falls, and route injuries to care.", "definition": "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.", "what_it_is_for": "Vertical movement between levels.", "affordances": [ "check stair dimensions against building rules", "improve stair and ladder safety", "find accessible alternatives such as ramps and lifts", "childproof stairs" ], "distinguishing_features": [ "Stepped vertical access", "Regulated dimensions", "Fall hazard", "Barrier for some users" ], "appearance": "Series of steps with treads, risers, handrails and landings, or rungs on ladders.", "visual_identification": [ "Treads, risers and handrails", "Landings between flights", "Ramps provide step-free access" ], "physical_properties": [ { "quantity": "Vertical step spacing", "unit": "millimetres", "typical_range": "", "note": "Measure the vertical distance between successive tread surfaces or successive rung centres, according to the construction." }, { "quantity": "Clear passage width", "unit": "millimetres", "typical_range": "", "note": "Measure the unobstructed width available between the side boundaries of the stair or ladder." }, { "quantity": "Inclination", "unit": "degrees", "typical_range": "", "note": "Measure the angle of the flight or ladder relative to a horizontal plane." }, { "quantity": "Clear headroom", "unit": "millimetres", "typical_range": "", "note": "Measure the vertical clearance above the stair pitch line to the nearest overhead obstruction." } ], "families_and_kinds": [ "straight and turning staircases", "spiral stairs", "outdoor steps", "escape stairs", "ladders (extended sense)" ], "related_models": [ { "relation": "is a kind of", "target": "building element", "why": "category" }, { "relation": "is contrasted with", "target": "ramp and lift", "why": "accessible alternatives" }, { "relation": "is regulated by", "target": "building regulations", "why": "rules" }, { "relation": "is related to", "target": "tower block", "why": "building context" } ], "identifiers": [], "standards_and_regulation": [ "National building regulations on stairs", "Accessibility standards", "EN 131 ladder standard" ], "failure_modes_and_hazards": [ "Falls, especially among older people and children", "Ladder accidents", "Inaccessible buildings" ], "in_scope": [], "out_of_scope": [], "characteristics": [], "agent_conduct": { "may": [ "Report damaged treads, loose handrails, poor lighting and obstructions on stairs.", "Guide people to accessible alternatives such as lifts or ramps." ], "must_not": [ "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." ], "requires_human": [ "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." ], "affected_parties": [ "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.", "master_systems": [] } }, "sources": [ { "id": "oewn", "title": "Open English WordNet 2024, synset oewn-04305309-n", "url": "https://en-word.net/id/oewn-04305309-n", "what_it_supports": "sense and gloss of the concept", "url_status": "live", "checked_by": "http 200" }, { "id": "wiktionary-en", "title": "Wiktionary: stairs", "url": "https://en.wiktionary.org/wiki/stairs", "what_it_supports": "word senses and usage", "url_status": "live", "checked_by": "http 200" } ], "structure": { "bundles": [ { "id": "design", "name": "Design", "description": "Dimensions.", "rationale": "Rules set 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.", "rationale": "Falls cause serious injury.", "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.", "rationale": "Ladders need care.", "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.", "rationale": "Alternatives matter.", "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" } ] } ] } ] } ] }, "openQuestions": [ "Should ladders be a separate entry?", "How should building rules be localised?", "How should fall prevention guidance be linked?" ], "statistics": { "bundles": 4, "layers": 8, "findings": 8, "questions": 16 } }