Wash. Admin. Code § 51-11C-61061 - Section A106.1 - General
A106.1 General. Table A106.1 lists heat loss coefficients for heated on-grade slab floors, in units of Btu/h . °F per lineal foot of perimeter.
Table A106.1 Default F -factors for On-Grade Slabs
|
Insulation Type |
R-0 |
R-5 |
R-10 |
R-15 |
R-20 |
R-30 |
|
Unheated Slab |
||||||
|
Uninsulated slab |
0.73 |
-- |
-- |
-- |
-- |
-- |
|
2 ft. Horizontal (No thermal break) |
-- |
0.70 |
0.70 |
0.69 |
-- |
-- |
|
4 ft. Horizontal (No thermal break) |
-- |
0.67 |
0.64 |
0.63 |
-- |
-- |
|
2 ft. Vertical |
-- |
0.58 |
0.54 |
0.52 |
-- |
-- |
|
4 ft. Vertical |
-- |
0.54 |
0.48 |
0.45 |
-- |
-- |
|
Fully insulated slab* |
-- |
-- |
0.36 |
0.31 |
0.26 |
0.21 |
|
Heated Slab |
||||||
|
Uninsulated slab |
0.84 |
-- |
-- |
-- |
-- |
-- |
|
Fully insulated slab* |
-- |
0.74 |
0.55 |
0.44 |
0.39 |
0.32 |
|
R-5 Center (With perimeter insulation) |
-- |
-- |
0.66 |
0.62 |
-- |
-- |
|
R-10 Center (With perimeter insulation) |
-- |
-- |
-- |
0.51 |
-- |
-- |
|
3 ft. Vertical |
-- |
-- |
0.78 |
-- |
-- |
-- |
|
*Edge insulation R-10 regardless of the below slab insulation level. |
Notes
Statutory Authority: RCW 19.27A.020, 19.27A.025 and chapters 19.27 and 34.05 RCW. 13-04-056, § 51-11C-61061, filed 2/1/13, effective 7/1/13.
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.
A106.1 General. Table A106.1 lists heat loss coefficients for heated on-grade slab floors, in units of Btu/h . °F per lineal foot of perimeter.
Table A106.1 Default F -factors for On-Grade Slabs
| Insulation Type | R-0 | R-5 | R-10 | R-15 | R-20 | R-30 |
| Unheated Slab | ||||||
| Uninsulated slab | 0.73 | -- | -- | -- | -- | -- |
| 2 ft. Horizontal (No thermal break) | -- | 0.70 | 0.70 | 0.69 | -- | -- |
| 4 ft. Horizontal (No thermal break) | -- | 0.67 | 0.64 | 0.63 | -- | -- |
| 2 ft. Vertical | -- | 0.58 | 0.54 | 0.52 | -- | -- |
| 4 ft. Vertical | -- | 0.54 | 0.48 | 0.45 | -- | -- |
| Fully insulated slab* | -- | -- | 0.36 | 0.31 | 0.26 | 0.21 |
| Heated Slab | ||||||
| Uninsulated slab | 0.84 | -- | -- | -- | -- | -- |
| Fully insulated slab* | -- | 0.74 | 0.55 | 0.44 | 0.39 | 0.32 |
| R-5 Center (With perimeter insulation) | -- | -- | 0.66 | 0.62 | -- | -- |
| R-10 Center (With perimeter insulation) | -- | -- | -- | 0.51 | -- | -- |
| 3 ft. Vertical | -- | -- | 0.78 | -- | -- | -- |
| *Edge insulation R-10 regardless of the below slab insulation level. |
Notes
Statutory Authority: RCW 19.27A.020, 19.27A.025 and chapters 19.27 and 34.05 RCW. 13-04-056, § 51-11C-61061, filed 2/1/13, effective 7/1/13.