WAC 51-11C-402142
WAC 51-11C-402142. Table C402.1.4.2 — Effective R-values for steel stud wall assemblies
Table C402.1.4.2
Effective R -values For Steel Stud Wall Assemblies
NOMINAL STUD DEPTH (inches) SPACING OF FRAMING (inches) CAVITY R -VALUE (insulation) CORRECTION FACTOR ( F c ) EFFECTIVE R -VALUE (ER) (Cavity R -Value × F c ) 3 1/2 16 13 0.46 5.98 15 0.43 6.45 3 1/2 24 13 0.55 7.15 15 0.52 7.80 6 16 19 0.37 7.03 21 0.35 7.35 6 24 19 0.45 8.55 21 0.43 9.03 8 16 25 0.31 7.75 24 25 0.38 9.50
NOMINAL STUD DEPTH (inches)
SPACING OF FRAMING (inches)
CAVITY R -VALUE
(insulation)
CORRECTION FACTOR ( F c )
EFFECTIVE
R -VALUE (ER)
(Cavity R -Value × F c )
3 1/2
16
13
0.46
5.98
15
0.43
6.45
3 1/2
24
13
0.55
7.15
15
0.52
7.80
6
16
19
0.37
7.03
21
0.35
7.35
6
24
19
0.45
8.55
21
0.43
9.03
8
16
25
0.31
7.75
24
25
0.38
9.50