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• • <br /> Envelope Requirements Summary, Part 2 ENV-REQ <br /> 2015 Seattle Energy Code Compliance Forms for Commercial Buildings including R2,R3,&R4 over 3 stories and all R1 Revised Feb 2017 <br /> Definitions: <br /> Ls=Liner system--A continuous membrane installed below the purlins and uninterrupted by framing members.Uncompressed,unfaced <br /> insulation rests on top of the membrane between the purlins.Refer to Section A 102.2.5.4. <br /> c.i.=Continuous insulation--Insulation that is continuous across all structural members without thermal bridges other than service <br /> openings and penetrations by metal fasteners with a x-sectional area of less than 0.04%of the opaque surface area of the assembly. <br /> Components with more than 0.04%metal penetrations may be eligible to follow the alternate CI values below. <br /> int=Intermediate framing--Includes insulated headers,corners and interior partition wall to exterior wall intersections.Refer to Section <br /> A103.2 for framing definitions. <br /> Footnote Summary: <br /> Each table in the 2015 WSEC has footnotes applicable to specific information provided in the table.This footnote summary provides only <br /> abbreviated details from these footnotes. Refer to 2015 Seattle Energy Code for complete footnote information. <br /> Note 1-Assembly descriptions can be found in Chapter 2 and Appendix A. <br /> Note 2-Use of assembly U-factors,C-factors and F-factors from Appendix A and Chapter 3 are required unless otherwise allowed <br /> by the provisions of this Code. <br /> Note 3-For metal building roofs where using R-value compliance method,a thermal spacer block with a minimum R-value of 3.5 is required. <br /> Otherwise use the U-factor compliance method. <br /> Note 4-Reserved. <br /> Note 5-Heated slab F-factors shall be determined specifically for heated slabs.Unheated slab F-factors shall not be used. <br /> Note 6-Reserved.(CMU walls must comply with full mass wall requirements in Seattle.) <br /> Note 7-Components with continuous insulation but with metal penetrations/connections may be eligible for alternate continuous <br /> insulation R-values if all provisions in applicable footnote are met. Refer to alternate prescriptive R-values in table below <br /> and Footnote G in Table C402.1.3 for eligibility requirements. <br /> Note 8-Prior to 1/1/2018 all systems qualify as Other Heating Systems(Column B in Table C402.4). After 1/1/2018 only systems <br /> identified in C402.4 as Other Heating Systems qualify,buildings with electric resistance or fossil fuel systems must comply with <br /> the Electric Resistance and Fossil Fuel System requirements.After 1/1/2018 the high performance glazing path is only allowed <br /> for Other Heating Systems. <br /> Alternate continuous insulation nominal R-values <br /> This alternate nominal R-value compliance option is allowed for projects complying with all of the following: <br /> 1.The ratio of the cross-sectional area,as measured in the plane of the surface,of metal penetrations of otherwise continuous <br /> insulation to the opaque surface area of the assembly is greater than 0.0004(0.04%),but less than 0.0008(0.08%),for use of Column <br /> B equivalents,and greater than or equal to 0.0008(0.08%),but less than 0.0012(0.12%),for use of Column C equivalents. <br /> 2.The metal penetrations of otherwise continuous insulation are isolated or discontinuous(e.g.,brick ties or other <br /> discontinuous metal attachments,offset brackets supporting shelf angles that allow insulation to go between the shelf <br /> angle and the primary portions of the wall structure).No continuous metal elements(e.g.,metal studs,z-girts,z-channels, <br /> shelf angles)penetrate the otherwise continuous portion of the insulation. <br /> 3.Building permit drawings shall contain details showing the locations and dimensions of all the metal penetrations(e.g., <br /> brick ties or other discontinuous metal attachments,offset brackets,etc.)of otherwise continuous insulation.In addition, <br /> calculations shall be provided showing the ratio of the cross-sectional area of metal penetrations of otherwise continuous <br /> insulation to the overall opaque wall area. <br /> Column A Column B Column C <br /> Assemblies with Alternate option for Alternate option for assemblies <br /> continuous assemblies with metal with metal penetrations, <br /> insulation(see penetrations,greater than greater than or equal to 0.08% <br /> definition) 0.04%but less than 0.08% but less than 0.12% <br /> R-9.5ci R-11.9ci R 13ci <br /> R-11.4ci R-14.3 ci R-15.7ei' <br /> R-13.3ci R-16.6ci R 83ei <br /> R-15.2ci R-19.0ci R-21ci <br /> R-30ci R-38ci R-42ci <br /> R 38ci R-48ci R-53ci <br /> R-13-R-7.5ci R-13+R 9.4ci R-13+R-10.3ei <br /> R-13+R10ci R-13+R-12,5ci R-13+R-13_Set <br /> __ <br /> R-13+R-12.5ci R-13+R-15.6ci" R13+R17.2ci <br /> R-13+R13ci R-13+R-16.3ci R-13+R-17.9ci <br /> R-19+R-8.5ci R-19+R-1O.6ci R 19+R 11.7ci <br /> R-19+R-14ci R-19+R 17.5ci R-19+R-19.2ci <br /> R-19+R16ci R-19+R-20ci R-19+R-22ci <br /> R-20-R 3.8ci R-20+R-4.8ci R-20—R-5.3 ci <br /> R-21 +R-5ci -21+R-63ci R-21+R-6.9ci <br />