GPT Minnesota Building Codes

[Eric]

The Minnesota Building Codes GPT incorporates the following:

• 2012 International Green Construction Code (IGCC)
• 2012 International Property Maintenance Code (IPMC)
• 2020 Illustrated Field Guide to the Minnesota Residential Code
• 2020 Minnesota Accessibility Code
• 2020 Minnesota Building Code
• 2020 Minnesota Conservation Code for Existing Buildings
• 2020 Minnesota Guide to the State Building Code
• 2020 Minnesota Mechanical and Fuel Gas Code with ANSI/ ASHRAE Standard 62.2-2016 and ANSI/ ASHRAE Standard 154-2016
• 2020 Minnesota Residential Code
• 2020 Minnesota State Fire Code
• 2023 National Electrical Code (NFPA-70)
• 2024 Minnesota Energy Code with ANSI/ASHRAE/IES Standard 90.1-2019

Have additional documents to add? Please reply below. Any files or webpages you'd like incorporated into the GPT can be included as attachments to your posts.

 

[Heppcatt]

This query is incorrect: "According to the 2020 Minnesota Residential Code, the minimum riser height allowed is 4 inches (102 mm). This is specified in the context of stair riser heights, which must be between 4 inches (102 mm) minimum and 7 inches (178 mm) maximum ."

There is no minimum requirement in Section R311.7.5.1 of the 2020 Minnesota Residential Code.

 

[Eric]

Thanks for the feedback! It appears the GPT was confused by your reference to the MN Residential Code as part of your question.

You asked: "In MN Residential code. What are the minimum riser heights allowed?"

If you instead simply ask "What are the minimum riser heights allowed?", here's the response you'll receive:

The minimum riser heights allowed vary depending on the specific code and context:

1. General Stairs (2020 Minnesota Building Code, Chapter 10 - Means of Egress):
   • Minimum riser height: 4 inches (102 mm).
2. Accessible Stairs (2020 Minnesota Accessibility Code, Chapter 5 - General Site and Building Elements):
   • Minimum riser height: 4 inches (100 mm).
3. Residential Stairs (2020 Minnesota Residential Code, Chapter 3 - Building Planning):
   • Minimum riser height: Not explicitly stated, but the riser height must be uniform and comply with the maximum height of 7 3/4 inches (196 mm).
4. Fire Escape Stairs (2020 Minnesota State Fire Code, Chapter 11 - Construction Requirements for Existing Buildings):
   • Minimum riser height: Not explicitly stated, but the maximum height is 9 inches for stairs serving more than 10 occupants and 12 inches for stairs serving 10 or fewer occupants.

It looks like the GPT provided the correct answer - 4 inches, based on Building Code and Accessibility Code - but deferred to you in attributing the requirement to the Residential Code.

I apologize for the unclear answer you received. For future queries, I suggest omitting any reference to specific codebooks.

If you have further feedback, please don't hesitate to let me know!