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 Washington Administrative Code (Last Updated: November 23, 2016)
 Title 51. Enterprise Services, Department of (Building Code Council)
 Chapter 51-11R. State Building Code adoption and amendment of the 2015 edition of the International Energy Conservation Code, Residential.

  Section 51-11R-30311. Table R303.1.3(1)—Default glazed fenestration U-factor.  

Latest version.
  • TABLE R303.1.3(1)
    DEFAULT GLAZED FENESTRATION U-FACTOR
    a
    Metal Thermal Break = A metal thermal break framed window shall incorporate the following minimum design characteristics:
     
    1) The thermal conductivity of the thermal break material shall be not more than 3.6 Btu-in/h/ft2/°F;
     
    2) The thermal break material must produce a gap in the frame material of not less than 0.210 inches; and
     
    3) All metal framing members of the products exposed to interior and exterior air shall incorporate a thermal break meeting the criteria in a) and b) above.
    [Statutory Authority: RCW 19.27A.020, 19.27A.045 and chapters 19.27 and 34.05 RCW. WSR 13-04-055, § 51-11R-30311, filed 2/1/13, effective 7/1/13.]
RCW 19.27A.020, 19.27A.045 and chapters 19.27 and 34.05 RCW. WSR 13-04-055, § 51-11R-30311, filed 2/1/13, effective 7/1/13.