New Building Codes Effective April 9, 2015

2012 International Building Code - IBC
2012 International Residential Code - IRC
2012 International Mechanical Code - IMC
2012 International Fuel Gas Code - IFGC
2012 International Existing Building Code - IEBC
2012 Uniform Plumbing Code - UPC
2014 National Electrical Code - NEC (NFPA 70)

2012 International Energy Conservation Code - IECC
2012 International Fire Code - IFC

The codes listed above have been amended by the Administrative Rules of Montana Title 24, Chapter 301 or City Code, Title 3 at www.helenamt.gov andclick on the tab "City Code". 

DESIGN REQUIREMENTS

Seismic Design Category according to the 2012 International Building Code (IBC), typically D0 or as calculated by International Building Code, Chapter 16 based on site specific soil conditions.

  • Wind Load - f 3s - 90 mph, f fm - 75 mph

  • Snow Load - (ground/roof) 30 lbs psf minimum

  • Frost Depth - 42" minimum to bottom of footing
    Ice and Water Barrier Under-layment Required - Yes

Board of Appeals

Board of Appeals Application Requirements (PDF)

SPECIAL INSPECTIONS