HTML has links - PDF has Authentication
51-11C-61040  <<  51-11C-61041 >>   51-11C-61042

PDFWAC 51-11C-61041

Section A104.1General.

A104.1 General. Table A104.1 lists heat loss coefficients for below-grade walls and floors.
Coefficients for below-grade walls are given as U-factors (Btu/h • ft2 • °F of wall area). Coefficients for below-grade slabs are listed as F-factors (Btu/h • ft • °F per lineal foot of slab perimeter).
Below-grade wall U-factors are only valid when used with the accompanying below-grade slab F-factor, and vice versa.
Table A104.1
Default Wall U-factors and Slab F-factors for Basements
 
Below Grade Wall U-factor
Below Grade Slab F-factor
2 Foot Depth Below Grade
Uninsulated
0.350
0.59
R-11 Interior
0.066
0.68
R-11 Interior w/TB
0.070
0.60
R-19 Interior
0.043
0.69
R-19 Interior w/TB
0.045
0.61
R-10 Exterior
0.070
0.60
R-12 Exterior
0.061
0.60
3.5 Foot Depth Below Grade
Uninsulated
0.278
0.53
R-11 Interior
0.062
0.63
R-11 Interior w/TB
0.064
0.57
R-19 Interior
0.041
0.64
R-19 Interior w/TB
0.042
0.57
R-10 Exterior
0.064
0.57
R-12 Exterior
0.057
0.57
7 Foot Depth Below Grade
Uninsulated
0.193
0.46
R-11 Interior
0.054
0.56
R-11 Interior w/TB
0.056
0.42
R-19 Interior
0.037
0.57
R-19 Interior w/TB
0.038
0.43
R-10 Exterior
0.056
0.42
R-12 Exterior
0.050
0.42
TB = Thermal Break
[Statutory Authority: RCW 19.27A.020, 19.27A.025 and chapters 19.27 and 34.05 RCW. WSR 13-04-056, § 51-11C-61041, filed 2/1/13, effective 7/1/13.]
Site Contents
Selected content listed in alphabetical order under each group