Building

Design Criteria/Codes

The following codes, with local amendments, are currently in effect:

Current Adopted Building Codes

  • 2012 International Building Code and Amendments

  • 2009 International Energy Conservation Code and Amendments

  • 2012 International Mechanical Code and Amendments

  • 2012 International Plumbing Code and Amendments

  • 2012 International Residential Code and Amendments

  • 2012 Fire Code and Amendments

  • 2012 International Fuel and Gas Code

  • 2014 National Electrical Code

  • Sign Code / Guidelines

 

SNOW LOAD

Roof Snow Load - 30psf

 

WIND LOAD

90 MPH 3 sec gust - Exposure C

 

SEISMIC DESIGN

Seismic Design Category: IRC: B

Seismic Design Category: IBC: Per chapter 16

 

CLIMATIC CONDITIONS

Heating Degree Days: 6343

Winter Design Temperature: -3 F

Summer Dry Bulb 90 F

Summer Wet Bulb 59 F

Air Freezing Index 867

Mean Annual Temperature 48.1 F

Minimum Frost Depth for Foundations 36 inches

 

COMMERCIAL FLOOR LOADS

IBC table 1607.1

 

RESIDENTIAL FLOOR LOADS

Live load 40psf (30psf in sleeping areas) see table R301.5

Dead Load 10psf

Duration of Load 1.00

Deflection L/360

 

ROOF LOADS

Live Load 30psf (attic="10psf" no storage, 20psf limited storage)

Dead Load 10psf Minimum or as required based on type of roofing material and ceiling material, see table R301.6

 

Duration of Load 1.15 (Snow)

Deflection L/180 Rafters (no ceiling); L/240 (ceiling); L /240 Beams, see table R301.7

 

DECKS

RESIDENTIAL EXTERIOR DECKS: 40psf Live Load (LL), see table R301.5

COMMERCIAL EXTERIOR DECKS: see table 1607.1

 

 In addition to the above, the building department may request additional data, calculations or information deemed necessary to confirm compliance with code requirements.

Prior Codes

The City of Lone Tree's incorporation was approved by voters in November of 1995. From November 1995 until September 1996, Douglas County still had jurisdiction and was on the 1991 UBC family of codes.

  • In September 1996, the City adopted the 1991 UBC family of codes and the 1993 NEC

  • In November 1999, the City adopted the 1997 UBC family of codes and the 1999 NEC

  • In November 2009, the City adopted the 2006 ICC family of codes and the 2008 NEC

  • In November 2011, the City adopted the 2009 ICC family of codes and the 2011 NEC

 

 

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