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• <br /> to 0.20. Calculations must include any floor-slab-edges that penetrate the hoistway and thus are <br /> considered part of the above-grade walls. <br /> C402.1.3 Insulation component R-value method.Building thermal envelope opaque assemblies shall <br /> comply with the requirements of Section C402.2 based on the climate zone specified in Chapter 3. For <br /> opaque portions of the building thermal envelope intended to comply on an insulation component R-value <br /> basis, the R-values for insulation shall not be less than that specified in Table C402.1.3. Commercial buildings <br /> or portions of commercial buildings enclosing Group R occupancies shall use the R-values from the"Group R" <br /> column of Table C402.1.3. Commercial buildings or portions of commercial buildings enclosing occupancies <br /> other than Group R shall use the R-values from the"All other"column of Table C402.1.3. <br /> TABLE C402.1.3 <br /> OPAQUE THERMAL ENVELOPE INSULATION COMPONENT <br /> MINIMUM REQUIREMENTS, R-VALUE METHODa, <br /> CLIMATE ZONE 5 AND MARINE 4 <br /> All Other Group R <br /> Roofs <br /> Insulation entirely above R-38ci R-38ci <br /> deck <br /> Metal buildingsb R-25.+ R-25.+ <br /> R-11 LS R-11 LS <br /> Attic and other R-49 R-49 <br /> Walls,Above Grade <br /> Massy R-9.5c ci R-13.3ci <br /> Mass transfer deck slab R-5 R-5 <br /> edge <br /> Metal building R-19ci or R-19ci or <br /> R-13+13ci R-13+13ci <br /> Steel framed R-13.+ R-19.+ <br /> R-10ci R-8.5ci <br /> Wood framed and other R-21 int or R-13+7.5ci std or <br /> R-15+5ci std R-20+3.8ci std or <br /> R-25 std <br /> Walls,Below Grade <br /> Below-grade walid,h Same as above grade Same as above grade <br /> Floors <br /> Massy R-30ci R-30ci <br /> Joist/framing R-30e R-30e <br /> Slab-on-Grade Floors <br /> Unheated slabs R-10 for 24"below R-10 for 24"below <br /> Heated slabsd R-10 perimeter& R-10 perimeter&under <br /> under entire slab entire slab <br /> Opaque Door <br /> Nonswinging R-4.75 R-4.75 <br /> For Si: 1 inch=25.4 mm.ci=Continuous insulation.NR=No requirement.LS= Liner system <br /> 2018 Washington State Energy Code CE-27 <br /> � l� <br />