{ "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-10-21T20:48:55Z", "providers": [ "Claude" ], "breadth": "researched by Claude against the sources listed below", "pass": 2, "wave": 5, "engine": "claude", "gate": { "passed": true, "version": "1.0", "at": "2026-10-21T20:50:30+00:00", "evidence": [ "completeness 1.00", "sense: Wikidata description", "8 live sources", "review by codex: pass" ] } }, "metaModel": { "id": "THING-Q145765", "registryId": "vr.tr.tensile-structure", "name": "tensile structure", "version": "0.2.0-wave.5", "entryKind": "thing", "family": "Thing Registry", "domain": [ "PHY.BLT" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q145765/", "model": { "registry_id": "vr.tr.tensile-structure", "name": "tensile structure", "purpose": "Let an agent describe tensile structures by form, materials and design standards, and point to engineering guidance, without giving structural approvals.", "definition": "A structure whose elements carry only tension, with no compression or bending in those elements, such as membrane roofs, cable nets and cable-stayed or suspension systems; tensioned membranes and cables are anchored to masts, arches or edge beams that take the compression.", "what_it_is_for": "Roofs, canopies, stadium covers and bridges with long spans and light weight.", "affordances": [ "describe forms and materials", "explain how loads are carried", "point to design standards", "describe notable examples" ], "distinguishing_features": [ "Mechanically prestressed membranes commonly use anticlastic (saddle) curvature; pneumatic membranes use synclastic curvature stabilised by pressure.", "Compression is carried by separate masts, arches or rings; form-finding links geometry, prestress and supports.", "Prestress gives stiffness, but wrinkling, slackening and stability must be checked under each load combination." ], "appearance": "Curved membranes or cable nets stretched between masts, arches and anchors.", "visual_identification": [ "Saddle-shaped or conical membranes", "Cables and masts with anchor points" ], "physical_properties": [], "families_and_kinds": [ "mechanically prestressed membrane structures (PTFE-coated glass fibre, PVC-coated polyester, ETFE)", "cable nets", "air-supported and inflated structures", "tensile subsystems of tensegrity structures and cable-supported bridges" ], "related_models": [ { "relation": "is a kind of", "target": "structural system", "why": "engineering" }, { "relation": "uses", "target": "cable", "why": "tension element" }, { "relation": "uses", "target": "architectural membrane", "why": "material" }, { "relation": "is confused with", "target": "shell structure", "why": "carries tension, compression and shear" } ], "identifiers": [], "standards_and_regulation": [ "CEN/TS 19102:2023 design of tensioned membrane structures (Technical Specification)", "EN 1993-1-11 design of steel structures with tension components", "ASCE/SEI 55-16 tensile membrane structures, including air-supported (US)" ], "failure_modes_and_hazards": [ "Loss of prestress and ponding", "Tearing of membranes", "Cable or anchor failure" ], "agent_conduct": { "may": [ "describe structures and point to standards" ], "must_not": [ "approve designs or declare structures safe" ], "requires_human": [ "design and inspection by qualified engineers" ] }, "ethics": { "considerations": [ "public safety" ], "affected_parties": [ "users of buildings" ] }, "owners": { "steward": "the owner of each structure", "master_systems": [ "asset records" ] }, "facets_not_applicable": { "properties": "Structures vary; spans and loads belong to each structure." }, "in_scope": [], "out_of_scope": [], "characteristics": [] }, "sources": [ { "id": "SRC-001", "title": "Q145765", "publisher": "Wikidata", "url": "https://www.wikidata.org/wiki/Q145765", "what_it_supports": "identity of the registry item, labels and sitelinks", "url_status": "live" }, { "id": "SRC-002", "title": "Tensile structure", "publisher": "Wikipedia", "url": "https://en.wikipedia.org/wiki/Tensile_structure", "what_it_supports": "general description of the subject", "url_status": "live" }, { "id": "SRC-003", "title": "Prospect for European Guidance for the Structural Design of Tensile Membrane Structures", "publisher": "European Commission Joint Research Centre", "url": "https://eurocodes.jrc.ec.europa.eu/sites/default/files/2023-11/JRC132615_01.pdf", "what_it_supports": "Membrane materials, form-finding, prestress, pneumatic curvature and ponding hazards.", "url_status": "live" }, { "id": "SRC-004", "title": "STN P CEN/TS 19102", "publisher": "Slovak Office of Standards, Metrology and Testing", "url": "https://normy.normoff.gov.sk/norma/138090/?lang=sk", "what_it_supports": "CEN/TS 19102:2023 designation and scope.", "url_status": "live" }, { "id": "SRC-005", "title": "ASCE 55 - Air Supported Structures and Tensioned Fabric Structures", "publisher": "American Society of Civil Engineers", "url": "https://www.asce.org/communities/institutes-and-technical-groups/structural-engineering-institute/committees/sei-board-of-governors/sei-technical-community-executive-committee/asce-55---air-supported-structures---tensioned-fabric-struct", "what_it_supports": "ASCE standards work covering tensile, air-supported, air-inflated and frame-supported membranes.", "url_status": "live" }, { "id": "SRC-006", "title": "Tensegrity", "publisher": "Texas A&M University, LASR Lab", "url": "https://lasr.tamu.edu/research/tensegrity/", "what_it_supports": "Tensegrity combines tensile strings and compressive bars.", "url_status": "live" }, { "id": "SRC-007", "title": "Lecture 7: Shell Structures", "publisher": "University of Ljubljana, ESDEP teaching materials", "url": "https://fgg-web.fgg.uni-lj.si/~/pmoze/esdep/master/wg08/l0700.htm", "what_it_supports": "Shell membrane action, bending and buckling.", "url_status": "live" }, { "id": "SRC-008", "title": "Structures: Huff Hall, the Armory, the Irwin Indoor Football Facility, and the State Farm Center", "publisher": "University of Illinois", "url": "https://iopn.library.illinois.edu/pressbooks/designbuiltenvironment/chapter/structures/", "what_it_supports": "Tensile members in bridges and tents coexist with compression supports.", "url_status": "live" } ], "structure": { "bundles": [ { "id": "form", "name": "Form", "description": "Which structure.", "rationale": "Form decides behaviour.", "layers": [ { "id": "type", "name": "Type", "description": "Membrane, cable net, tensegrity.", "findings": [ { "id": "structural-type", "name": "Structural type", "description": "Type and shape.", "questions": [ { "text": "What type of tensile structure is it?", "kind": "definition" }, { "text": "What is its shape?", "kind": "definition" } ] } ] }, { "id": "support", "name": "Support", "description": "Masts, arches, anchors.", "findings": [ { "id": "support-system", "name": "Support system", "description": "Compression members.", "questions": [ { "text": "Which elements carry compression?", "kind": "definition" }, { "text": "How is it anchored?", "kind": "provenance" } ] } ] } ] }, { "id": "materials", "name": "Materials", "description": "What it is made of.", "rationale": "Materials limit life and loads.", "layers": [ { "id": "membrane", "name": "Membrane", "description": "Fabric and coating.", "findings": [ { "id": "membrane-material", "name": "Membrane material", "description": "Type and life.", "questions": [ { "text": "Which membrane material is used?", "kind": "provenance" }, { "text": "What is its expected life?", "kind": "measurement" } ] } ] }, { "id": "cables", "name": "Cables", "description": "Steel and fittings.", "findings": [ { "id": "cable", "name": "Cable", "description": "Type and fittings.", "questions": [ { "text": "Which cables and fittings are used?", "kind": "provenance" }, { "text": "How are they protected?", "kind": "provenance" } ] } ] } ] }, { "id": "design", "name": "Design", "description": "Standards and loads.", "rationale": "Design follows standards.", "layers": [ { "id": "standards", "name": "Standards", "description": "Applicable codes.", "findings": [ { "id": "standard", "name": "Standard", "description": "Code and edition.", "questions": [ { "text": "Which design standards apply?", "kind": "provenance" }, { "text": "Which edition?", "kind": "provenance" } ] } ] }, { "id": "loads", "name": "Loads", "description": "Wind, snow, prestress.", "findings": [ { "id": "load-case", "name": "Load case", "description": "Loads.", "questions": [ { "text": "Which loads govern the design?", "kind": "provenance" }, { "text": "What prestress is set?", "kind": "measurement" } ] } ] } ] }, { "id": "operation", "name": "Operation", "description": "Inspection and maintenance.", "rationale": "Tension must be kept.", "layers": [ { "id": "inspection", "name": "Inspection", "description": "Checks.", "findings": [ { "id": "inspection", "name": "Inspection", "description": "Date and findings.", "questions": [ { "text": "When was it last inspected?", "kind": "provenance" }, { "text": "What was found?", "kind": "provenance" } ] } ] }, { "id": "maintenance", "name": "Maintenance", "description": "Retensioning and repair.", "findings": [ { "id": "maintenance", "name": "Maintenance", "description": "Works.", "questions": [ { "text": "Which maintenance was done?", "kind": "provenance" }, { "text": "Was the membrane retensioned or replaced?", "kind": "provenance" } ] } ] } ] } ] }, "openQuestions": [], "statistics": { "bundles": 4, "layers": 8, "findings": 8, "questions": 16 } }