ASHRAE-90.1-2022- - Page 256
Extracted Content
| Table A4.2.1 Assembly C-Factors for | Below-Grade Walls | Col3 |
|---|---|---|
| Framing Type and Depth | Rated R-Value of Insulation Alone | Specified C-Factors (Wall Only, without Soil and Air Films) |
| No framing | R-0 | C-1.140 |
Exterior Insulation, Continuous and Uninterrupted by Framing
| No framing | R-5.0 | C-0.170 |
|---|---|---|
| No framing | R-7.5 | C-0.119 |
| No framing | R-10.0 | C-0.092 |
| No framing | R-12.5 | C-0.075 |
| No framing | R-15.0 | C-0.063 |
| No framing | R-17.5 | C-0.054 |
| No framing | R-20.0 | C-0.048 |
| No framing | R-25.0 | C-0.039 |
| No framing | R-30.0 | C-0.032 |
| No framing | R-35.0 | C-0.028 |
| No framing | R-40.0 | C-0.025 |
| No framing | R-45.0 | C-0.022 |
| No framing | R-50.0 | C-0.020 |
Continuous Metal Framing at 24 in. on Center Horizontally
| 3.5 in. | R-11.0 | C-0.182 |
|---|---|---|
| 3.5 in. | R-13.0 | C-0.174 |
| 3.5 in. | R-15.0 | C-0.168 |
| 5.5 in. | R-19.0 | C-0.125 |
| 5.5 in. | R-21.0 | C-0.120 |
1 in. Metal Clips at 24 in. on Center Horizontally and 16 in. Vertically
| 1.0 in. | R-3.8 | C-0.233 |
|---|---|---|
| 1.0 in. | R-5.0 | C-0.201 |
| 1.0 in. | R-5.6 | C-0.189 |
| 1.5 in. | R-5.7 | C-0.173 |
| 1.5 in. | R-7.5 | C-0.147 |
| 1.5 in. | R-8.4 | C-0.138 |
| 2.0 in. | R-7.6 | C-0.138 |
| 2.0 in. | R-10.0 | C-0.116 |
| 2.0 in. | R-11.2 | C-0.108 |
| 2.5 in. | R-9.5 | C-0.114 |
| 2.5 in. | R-12.5 | C-0.096 |
| 2.5 in. | R-14.0 | C-0.089 |
| 3.0 in. | R-11.4 | C-0.098 |
| 3.0 in. | R-15.0 | C-0.082 |
| 3.0 in. | R-16.8 | C-0.076 |
| 3.5 in. | R-13.3 | C-0.085 |
| 3.5 in. | R-17.5 | C-0.071 |
| 3.5 in. | R-19.6 | C-0.066 |
| 4.0 in. | R-15.2 | C-0.076 |
| 4.0 in. | R-20.0 | C-0.063 |
| 4.0 in. | R-22.4 | C-0.058 |
254 ANSI/ASHRAE/IES Standard 90.1-2022 (I-P)