A103.3.2 Strap wall. Table A103.3.2: Assumes 2 x 6 studs framed on 16 or 24 inch centers. 2 x 3 or 2 x 4 strapping is run horizontally along the interior surface of the wall to provide additional space for insulation.
Table A103.3.2
2 x 6: Strap Wall
Siding Material/Frame Type
Lapped Wood
T1-11
STD
ADV
STD
ADV
R-19 + R-11 Batts
0.036
0.035
0.038
0.036
R-19 + R-8 Batts
0.041
0.039
0.042
0.040
[Statutory Authority: RCW 19.27A.020, 19.27A.025 and chapters 19.27 and 34.05 RCW. WSR 13-04-056, § 51-11C-610332, filed 2/1/13, effective 7/1/13.]