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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-30315. Table R303.1.3(5)—Small business compliance default table.  

Latest version.
  • TABLE R303.1.3(5)
    SMALL BUSINESS COMPLIANCE TABLE
    DEFAULT U-FACTORS FOR VERTICAL FENESTRATION
    1
    Low-eA (emissivity) shall be 0.24 to 0.16.
     
    Low-eB (emissivity) shall be 0.15 to 0.08.
     
    Low-eC (emissivity) shall be 0.07 or less.
    2
    Aluminum Thermal Break = An aluminum thermal break framed window shall incorporate the following minimum design characteristics:
    a)
    The thermal conductivity of the thermal break material shall be not more than 3.6 Btu-in/h/ft2/°F;
    b)
    The thermal break material must produce a gap in the frame material of not less than 0.210 inches; and
    c)
    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.
    3
    A minimum air space of 0.375 inches between panes of glass is required for double glazing.
    4
    A minimum air space of 0.25 inches between panes of glass is required for triple glazing.
    5
    Deemed to comply glazing shall not be used for performance compliance.
    [Statutory Authority: RCW 19.27A.020, 19.27A.045 and chapters 19.27 and 34.05 RCW. WSR 13-04-055, § 51-11R-30315, 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-30315, filed 2/1/13, effective 7/1/13.