(Effective Until July 1, 2010.)
WAC 51-11-1001   Section 1001 General.  


     1001.1 Scope: The following defaults shall apply to Chapters 1 through 20. This chapter includes tables of seasonal average heat-loss coefficients for specified nominal insulation. The heat-loss coefficients may also be used for heating system sizing.


     1001.2 Description: These coefficients were developed primarily from data and procedures from Standard RS-1, and taken specifically from Standard RS-2, listed in Chapter 7.


     Coefficients not contained in this chapter may be computed using the procedures listed in these references if the assumptions in the following sections and Standard RS-2, listed in Chapter 7, are used, along with data from the sources referenced above.


     1001.3 Air Films: Default R-values used for air films shall be as follows:


R-Value Condition
0.17 All exterior surfaces
0.61 Interior horizontal surfaces, heat flow up
0.92 Interior horizontal surfaces, heat flow down
0.68 Interior vertical surfaces

     1001.4 Compression of Insulation: Insulation which is compressed shall be rated in accordance with Table 10-A or reduction in value may be calculated in accordance with the procedures in Standard RS-1, listed in Chapter 7.


TABLE 10-A

R-Value of Fiberglass Batts Compressed within Various Depth Cavities
Insulation R-Value at Standard Thickness
R-Value 38 30 22 21 19 15 13 11 8 5 3
Standard Thickness 12" 9-1/2" 6-3/4" 5-1/2" 6-1/4" 3-1/2" 3-5/8" 3-1/2" 2-1/2" 1-1/2" 3/4"
Nominal Lumber Sizes, Inches Actual Depth of Cavity, Inches Insulation R-Values when Installed in a Confined Cavity
2 x 12 11-1/4 37 -- -- -- -- -- -- -- -- -- --
2 x 10 9-1/4 32 30 -- -- -- -- -- -- -- -- --
2 x 8 7-1/4 27 26 -- -- -- -- -- -- -- -- --
2 x 6 5-1/2 -- 21 20 21 18 -- -- -- -- -- --
2 x 4 3-1/2 -- -- 14 -- 13 15 13 11 -- -- --
2 x 3 2-1/2 -- -- -- -- -- -- 9.8 -- -- -- --
2 x 2 1-1/2 -- -- -- -- -- -- 6.3 6.0 5.7 5.0 --
2 x 1 3/4 -- -- -- -- -- -- -- -- -- 3.2 3.0




[Statutory Authority: RCW 19.27A.020, 19.27A.045. 04-01-106, § 51-11-1001, filed 12/17/03, effective 7/1/04. Statutory Authority: RCW 19.27A.025, 19.27A.045. 01-03-010, § 51-11-1001, filed 1/5/01, effective 7/1/01. Statutory Authority: RCW 19.27A.020 and 1990 c 2. 91-01-112, § 51-11-1001, filed 12/19/90, effective 7/1/91.]






(Effective July 1, 2010.)
WAC 51-11-1001   Section 1001 General.  


     1001.1 Scope: The following defaults shall apply to Chapters 1 through 20. This chapter includes tables of seasonal average heat-loss coefficients for specified nominal insulation. The heat-loss coefficients may also be used for heating system sizing.


     1001.2 Description: These coefficients were developed primarily from data and procedures from Standard RS-1, and taken specifically from Standard RS-2, listed in Chapter 7.


     Coefficients not contained in this chapter may be computed using the procedures listed in these references if the assumptions in the following sections and Standard RS-2, listed in Chapter 7, are used, along with data from the sources referenced above.


     1001.3 Air Films: Default R-values used for air films shall be as follows:


R-Value Condition
0.17 All exterior surfaces
0.61 Interior horizontal surfaces, heat flow up
0.92 Interior horizontal surfaces, heat flow down
0.68 Interior vertical surfaces

     1001.4 Compression of Insulation: Insulation which is compressed shall be rated in accordance with Table 10-A or reduction in value may be calculated in accordance with the procedures in Standard RS-1, listed in Chapter 7.

TABLE 10-A

R-Value of Fiberglass Batts Compressed within Various Depth Cavities
Insulation R-Value at Standard Thickness
Rated R-Value 82 71 60 49 38 30 22 21 19 15 13 11
Standard Thickness, Inches 26.0 22.5 19.0 15.5 12

 9.5 6.5 5.5 6 3.5 3.5 3.5
Nominal Lumber Sizes, Inches Actual Depth of Cavity, Inches Insulation R-Values when Installed in a Confined Cavity
Truss 26.0 82 -- -- -- -- -- -- -- -- -- -- --
Truss 22.5 -- 71 -- -- -- -- -- -- -- -- -- --
Truss 19.0 -- -- 60 -- -- -- -- -- -- -- -- --
Truss 15.5 -- -- -- 49 -- -- -- -- -- -- -- --
Truss 12.0 -- -- -- -- 38 -- -- -- -- -- -- --
2 x 12 11.25 -- -- -- -- 37 -- -- -- -- -- -- --
2 x 10 9.25 -- -- -- -- 32 30 -- -- -- -- -- --
2 x 8 7.25 -- -- -- -- 27 26 22 21 19 -- -- --
2 x 6 5.5 -- -- -- -- -- 21 20 21 18 -- -- --
2 x 4 3.5 -- -- -- -- -- -- 14 -- 13 15 13 11
  2.5 -- -- -- -- -- -- -- -- -- -- 9.8 --
  1.5 -- -- -- -- -- -- -- -- -- -- 6.3 6.0




[Statutory Authority: RCW 19.27A.025, 19.27A.045. 10-03-115, § 51-11-1001, filed 1/20/10, effective 7/1/10. Statutory Authority: RCW 19.27A.020, 19.27A.045. 04-01-106, § 51-11-1001, filed 12/17/03, effective 7/1/04. Statutory Authority: RCW 19.27A.025, 19.27A.045. 01-03-010, § 51-11-1001, filed 1/5/01, effective 7/1/01. Statutory Authority: RCW 19.27A.020 and 1990 c 2. 91-01-112, § 51-11-1001, filed 12/19/90, effective 7/1/91.]


NOTES:

     Reviser's note:  Notice of Objection: The Joint Administrative Rules Review Committee (Committee) finds that, in adopting the 2009 proposed changes to the State Energy Code, Chapter 51-11 WAC, on November 20, 2009, the State Building Code Council (Council) failed to comply with all requirements of the law and failed to adequately respond to the Committee's request for additional economic impact and cost-benefit analyses prior to adoption.

     On October 1, 2009, the Committee found that the Small Business Economic Impact Statement (SBEIS) for the proposed changes filed with the Code Reviser failed to comply with all requirements of law. The Committee requested that the Council conduct a cost-benefit analysis pursuant to RCW 34.05.328 and amend the SBEIS to provide additional economic impact information, including an estimate of the number of jobs that would be created or lost as a result of compliance with all the proposed rules, as required by RCW 19.85.040 (2)(d).

     The Council provided the Committee with information and data on November 18, 2009. On December 2, 2009, the Committee found that the Council failed to adequately respond to the Committee's request for additional data. Specifically, the Committee found that the Council failed to amend the SBEIS to (a) estimate the number of jobs that would be created or lost as a result of compliance with the proposed changes; and (b) support the SBEIS with a detailed and rigorous costs analysis of the cumulative impact of all the changes. In addition, the Committee found that the Council failed to provide the Committee with a cost-benefit analysis of the proposed changes and pursuant to the requirements of RCW 34.05.328.

     The Committee strongly supports a process that makes thoughtful and informed progress towards changes that result in improved energy efficiency in our buildings, wherever practicable. While the Council worked diligently, it is the opinion of the Committee that the Council did not fully develop and consider the economic impacts and costs versus benefits of these significant changes to our Energy Code. Furthermore, it is the opinion of the Committee that the Council and the Legislature need this information to fully evaluate the value, impacts, and consequences of the proposed codes, with due diligence to their respective fiduciary responsibilities, in order to create the best informed public policy.

     As a result, the Committee recommends that the Governor suspend the adoption and implementation of the changes to the Energy Code, Chapter 51-11 WAC, adopted by the Council on November 20, 2009, until such time as a more adequate analysis has been completed and considered by the appropriate bodies.

     For all of the above stated reasons, the Committee objects to the changes to the State Energy Code, Chapter 51-11 WAC, that were adopted by the Council on November 20, 2009, and hereby directs the Code Reviser, pursuant to RCW 34.05.640(4), to publish this Notice of Objection in the Washington State Register and along with any publication in the Washington Administrative Code of changes to Chapter 51-11 WAC that were adopted by the Council in 2009 and filed with the Code Reviser.