{"format":"cadcraft-library-item","format_version":1,"uuid":"dea8162e-3f00-4058-95ce-6ec688237220","version":3,"name":"Wisconsin: Wisconsin Uniform Dwelling Code (UDC)","kind":"regulation","category":"regulations/building","description":"The state's own code, not based on the IRC: every number is its own (Wisconsin Dept. of Safety and Professional Services (DSPS); Wis. Admin. Code chs. SPS 320-325). Entered 2026-10-27 (research confidence: high); not yet reviewed by a professional.","maker":"","model":"","ifc":{"class":"IfcControl","predefined":"NOTDEFINED"},"plan":{"layers":[],"entities":[]},"body":null,"params":{},"regulation":{"format":"cadcraft-regulation-pack","version":1,"id":"us-wi","name":"Wisconsin: Wisconsin Uniform Dwelling Code (UDC)","jurisdiction":{"country":"US","level":"state","region":"US-WI","name":"Wisconsin"},"base":null,"edition":"Wisconsin Uniform Dwelling Code (UDC)","in_force":null,"review":{"state":"draft","note":"The state's own code, not based on the IRC: every number is its own (Wisconsin Dept. of Safety and Professional Services (DSPS); Wis. Admin. Code chs. SPS 320-325). Entered 2026-10-27 (research confidence: high); not yet reviewed by a professional."},"authority":"adopted-law","source":{"name":"Wisconsin Dept. of Safety and Professional Services (DSPS), Wis. Admin. Code chs. SPS 320-325","url":"https://docs.legis.wisconsin.gov/code/admin_code/sps/safety_and_buildings_and_environment/320_325/321","date":"2024-11","checked":"2026-10-27"},"maker":null,"price":null,"criteria":[],"tables":[],"rules":[{"id":"stair.riser.max","applies":"stair","op":"<=","unit":"mm","clause":"SPS 321.04(2)(b)1.","label":"Riser height","note":"Spiral stairs 9.5 in.","value":203.2},{"id":"stair.tread.min","applies":"stair","op":">=","unit":"mm","clause":"SPS 321.04(2)(c)1.","label":"Tread depth","note":"Rectangular treads.","value":228.6},{"id":"stair.width.min","applies":"stair","op":">=","unit":"mm","clause":"SPS 321.04(2)(a)","label":"Stair width","note":"Spiral stairs 26 in.","value":914.4},{"id":"stair.headroom.min","applies":"stair","op":">=","unit":"mm","clause":"SPS 321.04(2)(d)1.","label":"Stair headroom","note":"6 ft 4 in.","value":1930.4},{"id":"stair.rail.height","applies":"stair","op":"between","unit":"mm","clause":"SPS 321.04(3)(b)1.a.","label":"Handrail height","note":"Above the tread nosing.","min":762,"max":965.2},{"id":"room.ceiling.min","applies":"room","op":">=","unit":"mm","clause":"SPS 321.06","label":"Ceiling height","note":"A room may be lower if at least half its floor area is 7 ft or more; beams may project 8 in below.","value":2133.6},{"id":"room.light.min","applies":"room","op":">=","unit":"pct","clause":"SPS 321.05(1)","label":"Glazing, share of floor area","note":"Exception for some basement, ground-floor and above-garage rooms other than bedrooms.","value":8},{"id":"room.vent.min","applies":"room","op":">=","unit":"pct","clause":"SPS 321.05(2)(a)1.","label":"Openable area, share of floor area","note":"Or balanced mechanical ventilation of at least 1 air change an hour.","value":3.5}]},"source_attrs":{},"license":{"id":"CC0-1.0","holder":"CadCraft","attribution":"“Wisconsin: Wisconsin Uniform Dwelling Code (UDC)” by CadCraft (https://docs.legis.wisconsin.gov/code/admin_code/sps/safety_and_buildings_and_environment/320_325/321), CC0 (https://creativecommons.org/publicdomain/zero/1.0/)","url":"https://creativecommons.org/publicdomain/zero/1.0/"},"provenance":{"library":"librarycraft","item":"dea8162e-3f00-4058-95ce-6ec688237220","version":3,"sha256":"647ace1597f17caff19190c349eac23e8e26b866e8e40e67cba7f5b64f3813e1","source_file":"us-wi.json","source_sha256":"6490d407b459eb676d0f173874be2ce466a15855bfdaa727f3699846fc1eaf13","published_at":"2026-10-27T02:07:28Z"}}