{"format":"cadcraft-library-item","format_version":1,"uuid":"a7d24e11-fd70-40be-baf7-61307db98597","version":3,"name":"Michigan: Michigan Residential Code 2015 (MRC)","kind":"regulation","category":"regulations/building","description":"Adopts IRC 2015 (LARA, Bureau of Construction Codes; 1972 PA 230 (MCL 125.1501 et seq.); Mich. Admin. Code R 408.30401 et seq.). State amendments to the checked rules: riser height, tread depth. Amendments were researched for stairs, ceiling height, light and ventilation only; every other rule (room size, egress, escape openings, electrical, alarms) is the base code's. Entered 2026-10-27 (researc…","maker":"","model":"","ifc":{"class":"IfcControl","predefined":"NOTDEFINED"},"plan":{"layers":[],"entities":[]},"body":null,"params":{},"regulation":{"format":"cadcraft-regulation-pack","version":1,"id":"us-mi","name":"Michigan: Michigan Residential Code 2015 (MRC)","jurisdiction":{"country":"US","level":"state","region":"US-MI","name":"Michigan"},"base":"us-irc-2015","edition":"IRC 2015 as adopted, 2016-02-08","in_force":"2016-02-08","review":{"state":"draft","note":"Adopts IRC 2015 (LARA, Bureau of Construction Codes; 1972 PA 230 (MCL 125.1501 et seq.); Mich. Admin. Code R 408.30401 et seq.). State amendments to the checked rules: riser height, tread depth. Amendments were researched for stairs, ceiling height, light and ventilation only; every other rule (room size, egress, escape openings, electrical, alarms) is the base code's. Entered 2026-10-27 (researc…"},"authority":"adopted-law","source":{"name":"LARA, Bureau of Construction Codes, 1972 PA 230 (MCL 125.1501 et seq.); Mich. Admin. Code R 408.30401 et seq.","url":"https://www.michigan.gov/en/lara/bureau-list/bcc/rules-acts/rules/currently-open","date":"2025-07-07","checked":"2026-10-27"},"maker":null,"price":null,"criteria":[],"tables":[],"rules":[{"id":"stair.riser.max","applies":"stair","op":"<=","unit":"mm","clause":"R 408.30519 (IRC R311.7.5.1)","label":"Riser height","note":"State amendment.","value":209.55},{"id":"stair.tread.min","applies":"stair","op":">=","unit":"mm","clause":"R 408.30519 (IRC R311.7.5.2)","label":"Tread depth","note":"State amendment.","value":228.6}]},"source_attrs":{},"license":{"id":"CC0-1.0","holder":"CadCraft","attribution":"“Michigan: Michigan Residential Code 2015 (MRC)” by CadCraft (https://www.michigan.gov/en/lara/bureau-list/bcc/rules-acts/rules/currently-open), CC0 (https://creativecommons.org/publicdomain/zero/1.0/)","url":"https://creativecommons.org/publicdomain/zero/1.0/"},"provenance":{"library":"librarycraft","item":"a7d24e11-fd70-40be-baf7-61307db98597","version":3,"sha256":"c96f479d463a7bfe79ebeae5bda331481f599f06b006e5cc5b7e3c224684caf1","source_file":"us-mi.json","source_sha256":"b933b08e98c83e678bd50c85b7d34be20136c2701ba3630516a2120d4943153c","published_at":"2026-10-27T02:07:27Z"}}