Wash. Admin. Code § 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 (Fc) |
EFFECTIVE R-VALUE (ER)(Cavity R-Value × Fc) |
|
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 |
Notes
State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.
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 (Fc) | EFFECTIVE R-VALUE (ER)(Cavity R-Value × Fc) |
| 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 |