(Effective until July 1, 2020)

PDFWAC 51-11C-610334

Section A103.3.4—Log wall.

A103.3.4 Log wall. See Table A103.3.4.
Table A103.3.4
Log Walls
 
Average Log
Diameter,
Inches
U-factor
 
NOTE: R-value of wood:
R-1.25 per inch thickness
Average wall thickness
90% average log diameter
6
0.148
 
8
0.111
 
10
0.089
 
12
0.074
 
14
0.063
 
16
0.056
 
 
 
 
 
[Statutory Authority: RCW 19.27A.020, 19.27A.025 and chapters 19.27 and 34.05 RCW. WSR 13-04-056, § 51-11C-610334, filed 2/1/13, effective 7/1/13.]
(Effective July 1, 2020)

PDFWAC 51-11C-610334

Section A103.3.4—Log wall.

A103.3.4 Log wall. U-factors for log walls shall be determined using ICC 400 Table 305.3.1.1, U-Factor of log wall (UW) by log thickness (WL) and specific gravity.
[Statutory Authority: RCW 19.27A.020, 19.27A.045, 19.27A.160 and chapter 19.27 RCW. WSR 20-01-047, § 51-11C-610334, filed 12/9/19, effective 7/1/20. Statutory Authority: RCW 19.27A.020, 19.27A.025 and chapters 19.27 and 34.05 RCW. WSR 13-04-056, § 51-11C-610334, filed 2/1/13, effective 7/1/13.]