(Effective until July 1, 2020)
Table R402.1.3—Equivalent U-factors.
TABLE R402.1.3
EQUIVALENT U-FACTORSa
Climate Zone | Fenestration U-Factor | Skylight U-Factor | Ceiling U-Factor | Frame Wall U-Factor | Mass Wall U-Factorb | Floor U-Factor | Below- Grade Wall U-Factor |
5 and Marine 4 | 0.30 | 0.50 | 0.026 | 0.056 | 0.056 | 0.029 | 0.042 |
a Nonfenestration U-factors shall be obtained from measurement, calculation or an approved source or as specified in Section R402.1.3. |
b Reserved. |
c Reserved. |
[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.]
(Effective July 1, 2020)
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.]