{"format":"cadcraft-library-item","format_version":1,"uuid":"953af556-2fa7-4b29-97e9-35d6f9ed7177","version":1,"name":"Stair, U-shaped","kind":"family","category":"families/family","description":"Generic family, 9 parameters. A stair made from a sketch. N1 and N2 are the treads in each flight; Steps and Rise follow from them and Height. Railings and the stairwell are not part of it.","maker":"","model":"","ifc":{"class":"IfcTypeProduct","predefined":"NOTDEFINED"},"plan":{"layers":[],"entities":[]},"body":null,"params":{},"family":{"format":"cadcraft-family","version":1,"key":"stair-u","name":"Stair, U-shaped","kind":"generic","host":"none","base":"","ifc":{"class":"IfcBuildingElementProxy"},"params":[{"key":"Width","kind":"length","value":914.4},{"key":"Tread","kind":"length","value":254},{"key":"Height","kind":"length","value":3000},{"key":"Thick","kind":"length","value":150},{"key":"N1","kind":"integer","value":7,"label":"Treads in the first flight"},{"key":"N2","kind":"integer","value":7,"label":"Treads in the second flight"},{"key":"Gap","kind":"length","value":50.8},{"key":"Steps","kind":"integer","value":16,"formula":"(N1 + N2 + 2)","label":"Risers"},{"key":"Rise","kind":"length","value":187.5,"formula":"(Height / Steps)","label":"Riser height"}],"solids":[{"id":"f1","name":"Treads, first flight","op":"box","style":"concrete","x0":"0","x1":"Tread","y0":"(-Width / 2)","y1":"(Width / 2)","z0":"(Rise - Thick)","z1":"Rise","array":{"count":"N1","dx":"Tread","dy":"0","dz":"Rise"}},{"id":"land","name":"Landing","op":"box","style":"concrete","x0":"(N1 * Tread)","x1":"(N1 * Tread + Width)","y0":"(-Width / 2)","y1":"(1.5 * Width + Gap)","z0":"((N1 + 1) * Rise - Thick)","z1":"((N1 + 1) * Rise)"},{"id":"f2","name":"Treads, second flight","op":"box","style":"concrete","x0":"(N1 * Tread - Tread)","x1":"(N1 * Tread)","y0":"((Width + Gap) - Width / 2)","y1":"((Width + Gap) + Width / 2)","z0":"((N1 + 2) * Rise - Thick)","z1":"((N1 + 2) * Rise)","array":{"count":"N2","dx":"(-Tread)","dy":"0","dz":"Rise"}}],"booleans":[],"notes":"A stair made from a sketch. N1 and N2 are the treads in each flight; Steps and Rise follow from them and Height. Railings and the stairwell are not part of it."},"source_attrs":{},"license":{"id":"CC0-1.0","holder":"CadCraft","attribution":"“Stair, U-shaped” by CadCraft, CC0 (https://creativecommons.org/publicdomain/zero/1.0/)","url":"https://creativecommons.org/publicdomain/zero/1.0/"},"provenance":{"library":"librarycraft","item":"953af556-2fa7-4b29-97e9-35d6f9ed7177","version":1,"sha256":"b73323756a68f2c3fbdf23c7f053ded4e16c6ed1016fb0d9665d9418d3a664b8","source_file":"stair-u.ccfamily.json","source_sha256":"a66cf4cc87250278215af9ed71f8508f6474dd50320b6d78988565c52c3be96a","published_at":"2026-10-31T04:20:24Z"}}