WAC 51-11R-30312:

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PDFWAC 51-11R-30312

Table R303.1.3(2)—Default opaque door U-factors.

TABLE R303.1.3(2)

DEFAULT OPAQUE DOOR U-FACTORS

Door Type		No Glazed Fenestration	Single Glazing	Double Glazing with 1/4 in. Airspace	Double Glazing with 1/2 in. Airspace	Double Glazing with e = 0.10, 1/2 in. Argon
SWINGING DOORS (Rough opening - 38 in. x 82 in.)
Slab Doors
Wood slab in wood framea		0.46
	6% glazed fenestration (22 in. x 8 in. lite)	-	0.48	0.47	0.46	0.44
	25% glazed fenestration (22 in. x 36 in. lite)	-	0.58	0.48	0.46	0.42
	45% glazed fenestration (22 in. x 64 in. lite)	-	0.69	0.49	0.46	0.39
	More than 50% glazed fenestration	Use Table R303.1.3(1)
Insulated steel slab with wood edge in wood framea		0.16
	6% glazed fenestration (22 in. x 8 in. lite)	-	0.21	0.20	0.19	0.18
	25% glazed fenestration (22 in. x 36 in. lite)	-	0.39	0.28	0.26	0.23
	45% glazed fenestration (22 in. x 64 in. lite)	-	0.58	0.38	0.35	0.26
	More than 50% glazed fenestration	Use Table R303.1.3(1)
Foam insulated steel slab with metal edge in steel frameb		0.37
	6% glazed fenestration (22 in. x 8 in. lite)	-	0.44	0.42	0.41	0.39
	25% glazed fenestration (22 in. x 36 in. lite)	-	0.55	0.50	0.48	0.44
	45% glazed fenestration (22 in. x 64 in. lite)	-	0.71	0.59	0.56	0.48
	More than 50% glazed fenestration	Use Table R303.1.3(1)
Cardboard honeycomb slab with metal edge in steel frameb		0.61
Style and Rail Doors
Sliding glass doors/French doors		Use Table R303.1.3(1)
Site-Assembled Style and Rail Doors
Aluminum in aluminum frame		-	1.32	0.99	0.93	0.79
Aluminum in aluminum frame with thermal break		-	1.13	0.80	0.74	0.63

Note:	Appendix A Tables A107.1(2) through A107.1(4) of chapter 51-11C WAC may also be used if applicable.
	a	Thermally broken sill (add 0.03 for nonthermally broken sill).
	b	Nonthermally broken sill.

[Statutory Authority: RCW 19.27A.020, 19.27A.045, 19.27A.160, and chapter 19.27A RCW. WSR 24-03-084, § 51-11R-30312, filed 1/16/24, effective 3/15/24. Statutory Authority: RCW 19.27A.020, 19.27A.045, 19.27A.160 and chapter 19.27 RCW. WSR 20-01-047, § 51-11R-30312, filed 12/9/19, effective 7/1/20. Statutory Authority: RCW 19.27A.025, 19.27A.045, 19.27.020, and 19.27.074. WSR 14-24-123, § 51-11R-30312, filed 12/3/14, effective 1/3/15. Statutory Authority: RCW 19.27A.020, 19.27A.045 and chapters 19.27 and 34.05 RCW. WSR 13-04-055, § 51-11R-30312, filed 2/1/13, effective 7/1/13.]