Building regulations: Building regulations
Montana: Montana State Building Code (IRC as adopted, ARM 24.301)
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- Category
- Building regulations: Building regulations
- Kind
- Regulation pack
- Languages
- None provided. The words are as the provider wrote them.
- Author
- CadCraft
- Version
- 3, published Oct 27, 2026 Published
Adopts IRC 2024 (Montana Department of Labor and Industry, Building and Commercial Measurements Bureau; ARM 24.301.154; MAR Notice No. 2026-95). 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 202…
License
CC0CC0 1.0 (public domain dedication). Anyone may use, change and share it for any purpose, with no conditions. Credit is welcome but not required.
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Regulation pack
Draft: entered from the published code, not yet reviewed by a professional. Adopts IRC 2024 (Montana Department of Labor and Industry, Building and Commercial Measurements Bureau; ARM 24.301.154; MAR Notice No. 2026-95). 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 202…
- Place
- United States (state: Montana)
- Pack id
us-mt- Builds on
- United States: International Residential Code 2024
- Edition
- IRC 2024 as adopted, 2026-09-26
- In force from
- 2026-09-26
- Authority
- Adopted law
- Source date
- 2026
- Last checked
- 2026-10-27
- Source
- Montana Department of Labor and Industry, Building and Commercial Measurements Bureau, ARM 24.301.154; MAR Notice No. 2…
| Rule | Clause | Required |
|---|---|---|
| Riser height State amendment. | ARM 24.301.154 (IRC 2024 R318.7.5.1) | At most 209.55 mm |
| Tread depth State amendment. | ARM 24.301.154 (IRC 2024 R318.7.5.2) | At least 228.6 mm |
A guide only: the registered professional and the local authority decide. A pack holds numbers and clause numbers, never the standard's text. The Building regulations add-on in BimCraft checks drawings against it.
Versions
All versions| Drawing | Version | Change | License | Status | Published |
|---|---|---|---|---|---|
| Version 3 | DataUpdated from the add-on's pack (c518bda8ee7f). | CC0 | Published | Oct 27, 2026 | |
| Version 2 | DataUpdated from the add-on's pack (22e09d388617). | CC0 | Published | Oct 27, 2026 | |
| Version 1 | GeometryFirst version, from the Building regulations add-on's pack. | CC0 | Published | Oct 27, 2026 |
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