Print
WACs > Title 51 > Chapter 51-11R > Section 51-11R-30311
51-11R-30310
51-11R-30312
Agency filings affecting this section
WAC 51-11R-30311
Table R303.1.3(1)âDefault glazed fenestration U-factor.
TABLE R303.1.3(1) DEFAULT GLAZED FENESTRATION U-FACTOR
FRAME TYPE SINGLE PANE DOUBLE PANE Â
Metal 1.20 0.80 SKYLIGHT
Metal with Thermal Breaka
1.10 0.65 See Table R303.1.3(4)
Nonmetal or Metal Clad 0.95 0.55 Â
Glazed Block 0.60
a
Metal Thermal Break = A metal thermal break framed window shall incorporate the following minimum design characteristics:
Â
1) The thermal conductivity of the thermal break material shall be not more than 3.6 Btu-in/h/ft2/°F;
Â
2) The thermal break material must produce a gap in the frame material of not less than 0.210 inches; and
Â
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.]