PDFWAC 51-11R-40213

Table R402.1.3—Equivalent U-factors.

TABLE R402.1.3
EQUIVALENT U-FACTORSa
Climate Zone 5 and Marine 4
Fenestration U-Factor
0.30
Skylight U-Factor
0.50
Ceiling U-Factor
0.026
Above-Grade Wall U-Factor
0.056
Floor U-Factor
0.029
Slab on Grade F-Factor
0.54
Below Grade 2' Depth
 
 
Wall U-Factor
0.042
 
Slab F-Factor
0.59
Below Grade 3.5' Depth
 
 
Wall U-Factor
0.040
 
Slab F-Factor
0.56
Below Grade 7' Depth
 
 
Wall U-Factor
0.035
 
Slab F-Factor
0.50
aU-factors or F-factors shall be obtained from measurement, calculation or an approved source or as specified in Section R402.1.5.
[Statutory Authority: RCW 19.27A.020, 19.27A.045, 19.27A.160 and chapter 19.27 RCW. WSR 20-01-047, § 51-11R-40213, filed 12/9/19, effective 7/1/20. Statutory Authority: RCW 19.27A.020, 19.27A.045, 19.27A.160, and 19.27.074. WSR 16-02-127, § 51-11R-40213, filed 1/6/16, effective 7/1/16. Statutory Authority: RCW 19.27A.020, 19.27A.045 and chapters 19.27 and 34.05 RCW. WSR 13-04-055, § 51-11R-40213, filed 2/1/13, effective 7/1/13.]