WSR 16-08-099
EXPEDITED RULES
BUILDING CODE COUNCIL
[Filed April 5, 2016, 10:17 a.m.]
Title of Rule and Other Identifying Information: Editorial changes to Appendix A of chapter 51-11C WAC, 2015 Washington State Energy CodeCommercial.
NOTICE
THIS RULE IS BEING PROPOSED UNDER AN EXPEDITED RULE-MAKING PROCESS THAT WILL ELIMINATE THE NEED FOR THE AGENCY TO HOLD PUBLIC HEARINGS, PREPARE A SMALL BUSINESS ECONOMIC IMPACT STATEMENT, OR PROVIDE RESPONSES TO THE CRITERIA FOR A SIGNIFICANT LEGISLATIVE RULE. IF YOU OBJECT TO THIS USE OF THE EXPEDITED RULE-MAKING PROCESS, YOU MUST EXPRESS YOUR OBJECTIONS IN WRITING AND THEY MUST BE SENT TO Steve Simpson, Chair, State Building Code Council, P.O. Box 41449, Olympia, WA 98504-1449, AND RECEIVED BY June 6, 2016.
Purpose of the Proposal and Its Anticipated Effects, Including Any Changes in Existing Rules: Makes editorial changes to the following sections of the commercial energy portion of the Washington State Energy Code.
Changes made to Section A103.3.7.1 and the associated tables are repealed to coordinate with the final adopted energy code requirements pertaining to CMU walls.
Similarly, changes in Table A101.5 are restored to the 2012 WSEC values.
Reasons Supporting Proposal: Changes are necessary to coordinate with rules not adopted in WSR 16-03-072.
Statutory Authority for Adoption: RCW 19.27A.025, 19.27A.045.
Statute Being Implemented: Chapters 19.27, 19.27A, and 34.05 RCW.
Rule is not necessitated by federal law, federal or state court decision.
Name of Proponent: State building code council, governmental.
Name of Agency Personnel Responsible for Drafting and Implementation: Krista Braaksma, P.O. Box 41449, Olympia, WA 98504-1449, (360) 407-9278; and Enforcement: Local jurisdictions.
April 5, 2016
Steve K. Simpson
Council Chair
AMENDATORY SECTION (Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-61015 Section A101.5Building materials.
A101.5 Building materials. Default R-values used for building materials shall be as shown in Table A101.5.
Table A101.5
Default R-values for Building Materials
Material
Nominal Size (in.)
Actual
Size (in.)
R-Value
(Heat Capacityc)
Air cavity (unventilated), between metal studs at 16 inches on centera
-
-
0.79
Air cavity (unventilated), all other depths and framing materials1
-
-
0.91
Airfilm, exterior surfacesb
-
-
0.17
Airfilm, interior horizontal surfaces, heat flow upb
-
-
0.61
Airfilm, interior horizontal surfaces, heat flow downb
-
-
0.92
Airfilm, interior vertical surfacesb
-
-
0.68
Brick at R-0.12/in. (face brick, 75% solid/25% core area, 130 lbs/ft3)
4
3.5
0.32 (5.9)
Carpet and rubber pad
-
-
1.23
Concretec at R-0.0625/in., heavyweight (144 lbs/ft3)
-
2
0.13 (HC-4.8)
 
-
4
0.25 (HC-9.6)
 
-
6
0.38 (HC-14.4)
 
-
8
0.50 (HC-19.2)
 
-
10
0.63 (HC-24.0)
 
-
12
0.75 (HC-28.8)
Concrete masonry units, solid grouted, lightweight (95 lbs/ft3)
6
-
0.80 (HC-11.4)
Concrete masonry units, solid grouted, normal weight (135 lbs/ft3)
6
-
0.51 (HC-13.2)
Concrete masonry units, partly grouted, lightweight (95 lbs/ft3)
6
-
1.33 (HC-6.7)
Concrete masonry units, partly grouted, normal weight (135 lbs/ft3)
6
-
0.82 (HC-9.0)
Concrete masonry units, solid grouted, lightweight (95 lbs/ft3)
8
-
1.05 (HC-15.5)
Concrete masonry units, solid grouted, normal weight (135 lbs/ft3)
8
-
0.69 (HC-17.9)
Concrete masonry units, partly grouted, lightweight (95 lbs/ft3)
8
-
1.44 (HC-9.6)
Concrete masonry units, partly grouted, normal weight (135 lbs/ft3)
8
-
0.98 (HC-12.0)
Concrete masonry units, solid grouted, lightweight (95 lbs/ft3)
10
-
1.30 (HC-19.7)
Concrete masonry units, solid grouted, normal weight (135 lbs/ft3)
10
-
0.87 (HC-22.6)
Concrete masonry units, partly grouted, lightweight (95 lbs/ft3)
10
-
1.61 (HC-11.9)
Concrete masonry units, partly grouted, normal weight (135 lbs/ft3)
10
-
1.11 (HC-14.8)
Concrete masonry units, solid grouted, lightweight (95 lbs/ft3)
12
-
1.53 (HC-23.9)
Concrete masonry units, solid grouted, normal weight (135 lbs/ft3)
12
-
1.06 (HC-27.2)
Concrete masonry units, partly grouted, lightweight (95 lbs/ft3)
12
-
1.75 (HC-14.2)
Concrete masonry units, partly grouted, normal weight (135 lbs/ft3)
12
-
1.23 (HC-17.5)
Flooring, wood subfloor
-
0.75
0.94
Gypsum board
-
0.5
0.45
 
-
0.625
0.56
Metal deck
-
-
0
Roofing, built-up
-
0.375
0.33
Sheathing, vegetable fiber board, 0.78 in.
-
0.78
2.06
Soil at R-0.104/in.
-
12
1.25
Steel, mild
 
1
0.0031807
Stucco
-
0.75
0.08
a
There is no credit for cavities that are open to outside air.
b
Air films do not apply to air cavities within an assembly.
c
For heat capacity for concrete ((with densities other than these values or other)) and concrete masonry materials with densities other than the values listed in Table A101.5, see Tables A103.3.7.1(1) through (3) or Tables A3.1B and A3.1C in ASHRAE/IESNA Standard 90.1.
AMENDATORY SECTION (Amending WSR 16-03-072, filed 1/19/16, effective 7/1/16)
WAC 51-11C-610337 Section A103.3.7Concrete and masonry walls.
A103.3.7 Concrete and masonry walls.
A103.3.7.1 Concrete masonry walls. The nominal R-values in Table((s)) A103.3.7.1(((1), A103.3.7.1(2) and A103.3.7.1(3))) may be used for purposes of calculating concrete masonry wall section U-factors in lieu of the ASHRAE isothermal planes calculation method as provided in Chapter 27 of the ASHRAE Fundamentals Handbook.
Table A103.3.7.1(((1)))
Default U-factors for Concrete and Masonry Walls
 
((8-inch Medium-Weight (115 lb/CF) CMU
 
All Cells Grouted
Grout @
16-inches OC
Grout @
32 inches OC
Grout @
48 inches OC
No Grout
(unreinforced)
Additional Insulation
 
Cores Empty
Cores Filled
Cores Empty
Cores Filled
Cores Empty
Cores Filled
Cores Empty
Cores Filled
None
0.58
0.52
0.42
0.48
0.35
0.48
0.32
0.43
0.21
R-5 continuous insulation
0.15
0.14
0.14
0.14
0.13
0.14
0.12
0.14
0.10
R-10 continuous insulation
0.09
0.08
0.08
0.08
0.08
0.08
0.08
0.08
0.07
R-15 continuous insulation
0.06
0.06
0.06
0.06
0.06
0.06
0.06
0.06
0.05
R-19 continuous
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.04
R-13 insulation 2x4 wood studs
0.08
0.08
0.08
0.08
0.08
0.08
0.07
0.08
0.07
R-21 insulation 2x6 wood studs
0.06
0.06
0.06
0.06
0.06
0.06
0.05
0.06
0.05
R-13 insulation 3-5/8" metal studs
0.16
0.15
0.14
0.14
0.13
0.15
0.13
0.14
0.11
R-15 insulation 3-5/8" metal studs @ 24 inches
0.11
0.10
0.09
0.10
0.09
0.10
0.07
0.10
0.07
R-19 insulation 5.5" metal studs
0.11
0.11
0.11
0.11
0.10
0.11
0.10
0.11
0.09
R-21 insulation 6" metal studs
0.11
0.11
0.10
0.11
0.10
0.11
0.09
0.11
0.08
R-21 insulation 6" metal studs @ 24 inches
0.09
0.09
0.09
0.09
0.08
0.09
0.08
0.09
0.07
 
12-inch Medium-Weight (115 lb/CF) CMU
 
All Cells Grouted
Grout @
16 inches OC
Grout @
32 inches OC
Grout @
48 inches OC
No Grout
(unreinforced)
Additional Insulation
 
Cores Empty
Cores Filled
Cores Empty
Cores Filled
Cores Empty
Cores Filled
Cores Empty
Cores Filled
None
0.47
0.44
0.34
0.42
0.28
0.42
0.25
0.40
0.15
R-5 continuous insulation
0.14
0.14
0.13
0.14
0.12
0.14
0.11
0.13
0.09
R-10 continuous insulation
0.08
0.08
0.08
0.08
0.07
0.08
0.07
0.08
0.06
R-15 continuous insulation
0.06
0.06
0.06
0.06
0.05
0.06
0.05
0.06
0.05
R-19 continuous
0.05
0.05
0.05
0.05
0.04
0.05
0.04
0.05
0.04
R-13 insulation 2x4 wood studs
0.08
0.08
0.08
0.08
0.07
0.08
0.07
0.08
0.06
R-21 insulation 2x6 wood studs
0.06
0.06
0.05
0.06
0.05
0.06
0.05
0.06
0.04
R-13 insulation 3-5/8" metal studs
0.15
0.14
0.13
0.14
0.12
0.14
0.11
0.14
0.09
R-15 insulation 3-5/8" metal studs @ 24 inches
0.15
0.14
0.13
0.14
0.12
0.14
0.11
0.14
0.09
R-19 insulation 6" metal studs
0.11
0.11
0.10
0.11
0.09
0.11
0.09
0.11
0.07
R-21 insulation 5.5" metal studs
0.10
0.10
0.09
0.10
0.09
0.10
0.08
0.10
0.07
R-21 insulation 6" metal studs @ 24 inches
0.09
0.09
0.08
0.09
0.08
0.09
0.08
0.09
0.06
Notes:
1. Interpolation is allowed between 8-inch and 12-inch CMU values (for 10-inch CMU).
2. Interpolation is allowed between 16 and 32-inch grout spacing (for 24-inch spacing).
3. Interpolation is allowed between 32 and 48-inch grout spacing (for 40-inch spacing).
4. "Cores filled" means that all cores not grouted are filled with perlite or vermiculite insulation.
5. Values are based on stud spacing of 16 inches on center.
6. Values are based on horizontal grout spacing of 48 inches OC.
7. Stud wall values include one layer of gypsum board on the interior.
8. Assembly values based on ASHRAE 90.1-2013.
Table A103.3.7.1(2)
Default U-factors for 80-Inch Clay Brick Masonry Walls))
8" Concrete masonry
 
CORE TREATMENT
 
Partial Grout with Ungrouted Cores
 
 
 
Loose-fill insulated
 
Wall Description
Empty
Perlite
Vermiculite
Solid Grout
Exposed Block, Both Sides
0.40
0.23
0.24
0.43
R-5 Interior Insulation, Wood Furring
0.14
0.11
0.12
0.15
R-6 Interior Insulation, Wood Furring
0.14
0.11
0.11
0.14
R-10.5 Interior Insulation, Wood Furring
0.11
0.09
0.09
0.11
R-8 Interior Insulation, Metal Clips
0.11
0.09
0.09
0.11
R-6 Exterior Insulation
0.12
0.10
0.10
0.12
R-10 Exterior Insulation
0.08
0.07
0.07
0.08
R-9.5 Rigid Polystyrene Integral Insulation, Two Webbed Block
0.11
0.09
0.09
0.12
12" Concrete masonry
 
CORE TREATMENT
 
Partial Grout with Ungrouted Cores
 
 
 
Loose-fill insulated
 
Wall Description
Empty
Perlite
Vermiculite
Solid Grout
Exposed Block, Both Sides
0.35
0.17
0.18
0.33
R-5 Interior Insulation, Wood Furring
0.14
0.10
0.10
0.13
R-6 Interior Insulation, Wood Furring
0.13
0.09
0.10
0.13
R-10.5 Interior Insulation, Wood Furring
0.11
0.08
0.08
0.10
R-8 Interior Insulation, Metal Clips
0.10
0.08
0.08
0.09
R-6 Exterior Insulation
0.11
0.09
0.09
0.11
R-10 Exterior Insulation
0.08
0.06
0.06
0.08
R-9.5 Rigid Polystyrene Integral Insulation, Two Webbed Block
0.11
0.08
0.09
0.12
8" Clay brick
 
CORE TREATMENT
 
Partial Grout with Ungrouted Cores
 
 
 
Loose-fill insulated
 
Wall Description
Empty
Perlite
Vermiculite
Solid Grout
Exposed Block, Both Sides
0.50
0.31
0.32
0.56
R-5 Interior Insulation, Wood Furring
0.15
0.13
0.13
0.16
R-6 Interior Insulation, Wood Furring
0.15
0.12
0.12
0.15
R-10.5 Interior Insulation, Wood Furring
0.12
0.10
0.10
0.12
R-8 Interior Insulation, Metal Clips
0.11
0.10
0.10
0.11
R-6 Exterior Insulation
0.12
0.11
0.11
0.13
R-10 Exterior Insulation
0.08
0.08
0.08
0.09
((Table A103.3.7.1(3)
Default U-factors for)) 6-Inch Concrete Poured
or Precast ((Masonry Walls))
 
CORE TREATMENT
 
Partial Grout with Ungrouted Cores
 
 
 
Loose-fill insulated
 
Wall Description
Empty
Perlite
Vermiculite
Solid Grout
Exposed Concrete, Both Sides
NA
NA
NA
0.61
R-5 Interior Insulation, Wood Furring
NA
NA
NA
0.16
R-6 Interior Insulation, Wood Furring
NA
NA
NA
0.15
R-10.5 Interior Insulation, Wood Furring
NA
NA
NA
0.12
R-8 Interior Insulation, Metal Clips
NA
NA
NA
0.12
R-6 Exterior Insulation
NA
NA
NA
0.13
R-10 Exterior Insulation
NA
NA
NA
0.09
Notes ((for Tables A103.3.7.1(2) and A103.3.7.1(3))):
1. Grouted cores at 40" x 48" on center vertically and horizontally in partial grouted walls.
2. Interior insulation values include 1/2" gypsum board on the inner surface.
3. Furring and stud spacing is 16" on center. Insulation is assumed to fill furring space and is not compressed.
4. Intermediate values may be interpolated using this table. Values not contained in this table may be computed using the procedures listed in the ASHRAE Fundamentals Handbook.
5. Concrete masonry unit (CMU) assembly U-values are based on local test data for Washington state CMU block material using the ASTM C-236-87 steady state thermal conductance test. Tests included an 8"x8"x16" CMU with all cells filled with vermiculite (1995) and 8"x8"x16" CMU with all cells filled with polymaster foam in place insulation (1996). Refer to ASHRAE Standard 90.1 for additional nationally recognized data on the thermal performance of CMU block walls.
Table A103.3.7.1(2)
Default U-Factors for Concrete and Masonry Wallsa, b, c, d
Framing Type and Depth
Rated R-value of Insulation Alone
Assembly U-factors for Solid Concrete Walls
Assembly U-factors for Concrete Block Walls: Solid Grouted
Assembly U-factors for Concrete Block Walls: Partially Grouted (Cores Uninsulated Except Where Specified)
Base Wall only
 
 
 
No Framing
R-0
U-0.740
U-0.580
U-0.480
 
Ungrouted Cores Filled with Loose-Fill Insulation
N.A.
N.A.
U-0.350
Continuous Wood Framing
 
 
 
0.75 in.
R-3.0
U-0.247
U-0.226
U-0.210
1.5 in.
R-6.0
U-0.160
U-0.151
U-0.143
2.0 in.
R-10.0
U-0.116
U-0.111
U-0.107
3.5 in.
R-11.0
U-0.094
U-0.091
U-0.088
3.5 in.
R-13.0
U-0.085
U-0.083
U-0.080
3.5 in.
R-15.0
U-0.079
U-0.077
U-0.075
5.5 in.
R-19.0
U-0.060
U-0.059
U-0.058
5.5 in.
R-21.0
U-0.057
U-0.055
U-0.054
Continuous Metal Framing at 24 in. on center horizontally
 
 
1.0 in.
R-0.0
U-0.414
U-0.359
U-0.318
1.0 in.
R-3.8
U-0.325
U-0.290
U-0.263
1.0 in.
R-5.0
U-0.314
U-0.281
U-0.255
1.0 in.
R-6.5
U-0.305
U-0.274
U-0.249
1.5 in.
R-11.0
U-0.267
U-0.243
U-0.223
2.0 in.
R-7.6
U-0.230
U-0.212
U-0.197
2.0 in.
R-10.0
U-0.219
U-0.202
U-0.188
2.0 in.
R-13.0
U-0.210
U-0.195
U-0.182
3.0 in.
R-11.4
U-0.178
U-0.167
U-0.157
3.0 in.
R-15.0
U-0.168
U-0.158
U-0.149
3.0 in.
R-19.0
U-0.161
U-0.152
U-0.144
3.5 in.
R-11.0
U-0.168
U-0.158
U-0.149
3.5 in.
R-13.0
U-0.161
U-0.152
U-0.144
3.5 in.
R-15.0
U-0.155
U-0.147
U-0.140
4.5 in.
R-17.1
U-0.133
U-0.126
U-0.121
4.5 in.
R-22.5
U-0.124
U-0.119
U-0.114
4.5 in.
R-25.2
U-0.122
U-0.116
U-0.112
5.0 in.
R-19.0
U-0.122
U-0.117
U-0.112
5.0 in.
R-25.0
U-0.115
U-0.110
U-0.106
5.0 in.
R-28.0
U-0.112
U-0.107
U-0.103
5.0 in.
R-32.0
U-0.109
U-0.105
U-0.101
5.5 in.
R-19.0
U-0.118
U-0.113
U-0.109
5.5 in.
R-20.9
U-0.114
U-0.109
U-0.105
5.5 in.
R-21.0
U-0.113
U-0.109
U-0.105
5.5 in.
R-27.5
U-0.106
U-0.102
U-0.099
5.5 in.
R-30.8
U-0.104
U-0.100
U-0.096
6.0 in.
R-22.8
U-0.106
U-0.102
U-0.098
6.0 in.
R-30.0
U-0.099
U-0.095
U-0.092
6.0 in.
R-33.6
U-0.096
U-0.093
U-0.090
6.5 in.
R-24.7
U-0.099
U-0.096
U-0.092
7.0 in.
R-26.6
U-0.093
U-0.090
U-0.087
7.5 in.
R-28.5
U-0.088
U-0.085
U-0.083
8.0 in.
R-30.4
U-0.083
U-0.081
U-0.079
1 in. Metal Clips at 24 in. on center horizontally and 16 in. vertically (also, where allowed by Section C402.1.3, for assemblies with a ratio of metal penetration area/mass wall area of < 0.0004 or < 0.04% of the mass wall area) See ASHRAE Fundamentals for determination of U-factors for assemblies that include metal other than screws and nails.
1.0 in.
R-3.8
U-0.210
U-0.195
U-0.182
1.0 in.
R-5.0
U-0.184
U-0.172
U-0.162
1.0 in.
R-5.6
U-0.174
U-0.163
U-0.154
1.5 in.
R-5.7
U-0.160
U-0.151
U-0.143
1.5 in.
R-7.5
U-0.138
U-0.131
U-0.125
1.5 in.
R-8.4
U-0.129
U-0.123
U-0.118
2.0 in.
R-7.6
U-0.129
U-0.123
U-0.118
2.0 in.
R-10.0
U-0.110
U-0.106
U-0.102
2.0 in.
R-11.2
U-0.103
U-0.099
U-0.096
2.5 in.
R-9.5
U-0.109
U-0.104
U-0.101
2.5 in.
R-12.5
U-0.092
U-0.089
U-0.086
2.5 in.
R-14.0
U-0.086
U-0.083
U-0.080
3.0 in.
R-11.4
U-0.094
U-0.090
U-0.088
3.0 in.
R-15.0
U-0.078
U-0.076
U-0.074
3.0 in.
R-16.8
U-0.073
U-0.071
U-0.069
3.5 in.
R-13.3
U-0.082
U-0.080
U-0.077
3.5 in.
R-17.5
U-0.069
U-0.067
U-0.065
3.5 in.
R-19.6
U-0.064
U-0.062
U-0.061
4.0 in.
R-15.2
U-0.073
U-0.071
U-0.070
4.0 in.
R-20.0
U-0.061
U-0.060
U-0.058
4.0 in.
R-22.4
U-0.057
U-0.056
U-0.054
5.0 in.
R-28.0
U-0.046
U-0.046
U-0.045
6.0 in.
R-33.6
U-0.039
U-0.039
U-0.038
7.0 in.
R-39.2
U-0.034
U-0.034
U-0.033
8.0 in.
R-44.8
U-0.030
U-0.030
U-0.029
9.0 in.
R-50.4
U-0.027
U-0.027
U-0.026
10 in.
R-56.0
U-0.024
U-0.024
U-0.024
11 in.
R-61.6
U-0.022
U-0.022
U-0.022
Continuous Insulation Uninterrupted by Framing
No Framing
R-1.0
U-0.425
U-0.367
U-0.324
 
R-2.0
U-0.298
U-0.269
U-0.245
 
R-3.0
U-0.230
U-0.212
U-0.197
 
R-4.0
U-0.187
U-0.175
U-0.164
 
R-5.0
U-0.157
U-0.149
U-0.141
No Framing
R-6.0
U-0.136
U-0.129
U-0.124
 
R-7.0
U-0.120
U-0.115
U-0.110
 
R-8.0
U-0.107
U-0.103
U-0.099
 
R-9.0
U-0.097
U-0.093
U-0.090
 
R-10.0
U-0.088
U-0.085
U-0.083
No Framing
R-11.0
U-0.081
U-0.079
U-0.076
 
R-12.0
U-0.075
U-0.073
U-0.071
 
R-13.0
U-0.070
U-0.068
U-0.066
 
R-14.0
U-0.065
U-0.064
U-0.062
 
R-15.0
U-0.061
U-0.060
U-0.059
No Framing
R-16.0
U-0.058
U-0.056
U-0.055
 
R-17.0
U-0.054
U-0.053
U-0.052
 
R-18.0
U-0.052
U-0.051
U-0.050
 
R-19.0
U-0.049
U-0.048
U-0.047
 
R-20.0
U-0.047
U-0.046
U-0.045
No Framing
R-21.0
U-0.045
U-0.044
U-0.043
 
R-22.0
U-0.043
U-0.042
U-0.042
 
R-23.0
U-0.041
U-0.040
U-0.040
 
R-24.0
U-0.039
U-0.039
U-0.038
 
R-25.0
U-0.038
U-0.037
U-0.037
No Framing
R-30.0
U-0.032
U-0.032
U-0.031
 
R-35.0
U-0.028
U-0.027
U-0.027
 
R-40.0
U-0.024
U-0.024
U-0.024
 
R-45.0
U-0.022
U-0.021
U-0.021
 
R-50.0
U-0.019
U-0.019
U-0.019
 
R-55.0
U-0.018
U-0.018
U-0.018
 
R-60.0
U-0.016
U-0.016
U-0.016
Brick cavity wall with continuous insulation
No Framing
R-0.0
U-0.337
U-0.299
U-0.270
No Framing
R-3.8
U-0.148
U-0.140
U-0.133
No Framing
R-5.0
U-0.125
U-0.120
U-0.115
No Framing
R-6.5
U-0.106
U-0.102
U-0.098
No Framing
R-7.6
U-0.095
U-0.091
U-0.088
No Framing
R-10.0
U-0.077
U-0.075
U-0.073
No Framing
R-10.5
U-0.079
U-0.077
U-0.075
No Framing
R-11.4
U-0.070
U-0.068
U-0.066
No Framing
R-15.0
U-0.056
U-0.055
U-0.053
No Framing
R-16.5
U-0.054
U-0.053
U-0.052
No Framing
R-19.0
U-0.046
U-0.045
U-0.044
No Framing
R-22.5
U-0.041
U-0.040
U-0.039
No Framing
R-28.5
U-0.033
U-0.032
U-0.032
Continuous Insulation Uninterrupted by Framing with Stucco and Continuous Metal Framing at 24 in. on center horizontally
1.0 in.
R-0.0 + R-19 c.i.
U-0.047
U-0.046
U-0.045
1.0 in.
R-3.8 + R-19 c.i.
U-0.045
U-0.044
U-0.044
1.0 in.
R-5.0 + R-19 c.i.
U-0.045
U-0.044
U-0.043
1.0 in.
R-6.5 + R-19 c.i.
U-0.045
U-0.044
U-0.043
1.5 in.
R-11.0 + R-19 c.i.
U-0.044
U-0.043
U-0.043
2.0 in.
R-7.6 + R-19 c.i.
U-0.043
U-0.042
U-0.041
2.0 in.
R-10.0 + R-19 c.i.
U-0.042
U-0.041
U-0.041
2.0 in.
R-13.0 + R-19 c.i.
U-0.042
U-0.041
U-0.041
3.0 in.
R-11.4 + R-19 c.i.
U-0.041
U-0.040
U-0.039
3.0 in.
R-15.0 + R-19 c.i.
U-0.040
U-0.039
U-0.039
3.0 in.
R-19.0 + R-19 c.i.
U-0.040
U-0.039
U-0.038
3.5 in.
R-11.0 + R-19 c.i.
U-0.040
U-0.039
U-0.039
3.5 in.
R-13.0 + R-19 c.i.
U-0.040
U-0.039
U-0.038
5.0 in.
R-19.0 + R-19 c.i.
U-0.037
U-0.036
U-0.036
5.0 in.
R-25.0 + R-19 c.i.
U-0.036
U-0.035
U-0.035
5.0 in.
R-32.5 + R-19 c.i.
U-0.035
U-0.035
U-0.034
5.5 in.
R-19.0 + R-19 c.i.
U-0.036
U-0.036
U-0.035
5.5 in.
R-21.0 + R-19 c.i.
U-0.035
U-0.035
U-0.035
Note for Default Table A103.3.7.1(2):
a.
It is acceptable to use the U-factors in Table A103.3.7.1(2) for all concrete and masonry walls, provided that the grouting is equal to or less than that specified.
 
- For ungrouted walls, use the partially grouted column.
 
- For metal studs and z-furring, use the continuous-metal-framing category.
 
- For discontinuous metal clips 1 inch square or smaller, use the metal-clip category.
 
- For insulation that is attached without any framing members (e.g. glued), use the continuous-insulation uninterrupted-by-framing category. Continuous insulation may be installed on the interior or exterior of masonry walls, or between stand-alone walls in multilayer masonry walls, or on the interior or exterior of the concrete.
b.
For Table A103.3.7.1(2), the U-factor includes R-0.17 for exterior air film and R-0.68 for interior air film-vertical surfaces. For insulated walls, the U-factor also includes R-0.45 for 0.5 in. gypsum board. U-factors are provided for the following configurations:
 
(1) Concrete wall: 8-in. normal weight concrete wall with a density of 145 lb/ft3.
 
(2) Solid grouted concrete block wall: 8-in. medium weight ASTM C90 concrete block with a density of 115 lb/ft3 and solid grouted cores.
 
(3) Partially grouted concrete block wall: 8-in. medium weight ASTM C90 concrete block with a density of 115 lb/ft3 having reinforcing steel every 32 in. vertically and every 48 in. horizontally, with cores grouted in those areas only. Other cores are filled with insulating material only if there is no other insulation.
c.
For walls with insulation contained in a framing layer, the U-factors in Table A103.3.7.1(2) assume contact (and thermal bridging) between the mass wall and other framing. For wall assemblies with multiple layers where the wood or metal framing layer does not contact the concrete or masonry layer (i.e., walls with an airspace between the stud wall layer and the mass wall layer), it is acceptable to use the appropriate wood or metal frame wall default U-factors in Tables A103.3.1 or A103.3.6.1. Note: It is acceptable to use this approach where the insulation extends beyond the framing and is in contact with the mass wall layer (e.g. a nominal four-inch metal stud containing insulation that is nominally six inches thick and therefore extends two inches beyond the back of the metal stud).
d.
Except for wall assemblies qualifying for note 3, if not taken from Table A103.3.7.1(2), mass wall U-factors shall be determined in accordance with ASHRAE 90.1, Appendix A, Section A3.1 and Tables A3.1A to A3.1D, or Section A9.4.
A103.3.7.2 Peripheral edges of intermediate concrete floors. See Table A103.3.7.2.
Table A103.3.7.2
Default U-factors for Peripheral Edges of Intermediate Concrete Floorsa, b, c((, d))
 
Average Thickness of Wall above and below
Slab Edge Treatment
6 inches
8 inches
10 inches
12 inches
Exposed Concrete
0.816
0.741
0.678
0.625
R-5 Exterior Insulation
0.161
0.157
0.154
0.152
R-6 Exterior Insulation
0.138
0.136
0.134
0.132
R-7 Exterior Insulation
0.122
0.120
0.118
0.116
R-8 Exterior Insulation
0.108
0.107
0.106
0.104
R-9 Exterior Insulation
0.098
0.097
0.095
0.094
R-10 Exterior Insulation
0.089
0.088
0.087
0.086
R-11 Exterior Insulation
0.082
0.081
0.080
0.079
R-12 Exterior Insulation
0.076
0.075
0.074
0.074
R-13 Exterior Insulation
0.070
0.070
0.069
0.068
R-14 Exterior Insulation
0.066
0.065
0.065
0.064
R-15 Exterior Insulation
0.062
0.061
0.061
0.060
Note for Table A103.3.7.2:
a.
Exterior insulation values listed above are continuous R-values on the exterior side of the concrete floor.
b.
For conditions with an exterior wall above the peripheral edge of intermediate concrete floor but with no wall below the intermediate concrete floor this table may be used as long as the code minimum insulation is applied to the floor slab below the concrete floor.
c.
Typical conditions where conditioned space building envelope wall thermal insulation values are broken concrete floors include, but are not limited to, the following examples:
 
1. Elevator hoistway shafts that serve the conditioned building and pass through unconditioned floors such as parking garage levels;
 
2. Stairwell enclosures that serve the conditioned building and pass through unconditioned floors such as parking garage levels;
 
3. Walls between interior and exterior building envelope that separate the interior conditioned space from an exterior courtyard or roofdeck;
 
4. Walls between interior and exterior building envelope that separate the interior conditioned space from an exterior unconditioned space on parking garage levels.