HomeMy WebLinkAboutLoad CalculationsR402.1.1 Vapor retarder. Wall assemblies in the build_:f .tky! t. e nu.e t o p e.sha l_compry ; i,h A;; ;;or rerarderrequrrements of Secrion R70Z.i of the Internii:ionA nii-dential Code or Section 1404.3 "{th"-h;;;;;rnat Buitd_ing Code, as applicable.
R402.1.2 fnsulation and
_
fenestration criteria. Theb:Wng the rmat e nv e top e "h;li ;;;;;; ffiirements ofTable R402.1.2, based on rhe climate zoni specified inChapter 3.
R402.1.3 R'varue computation. Insulation material usedin layers, such as framing cavity insuiir;on or'continuous
insulation, shall be sum.med to compute the correspondingcomponent R_value. The manufactr.*,r-,"ttf"d R_valueshalt be used for blown_in i;;;Li";.;"rr*i"o R_vatuesshatl.nor include an R_value ioffil,tffi;lihur"riut, o,air fitms. Where insulated .idi;g-il;r;j;;'1il purpose ofcomptying with the continuousln;"1ffi; d;rements ofTable R402.1.2, the rnunuru"iur".;r-iilffih,atue fortheinsutated siding shall be;;;;; R:bl[.'
R402.1.4 U-factor alternative. An assembly with a U_fac_tor equar ro or ress than that rp"rifi;Jl;"iu[te B+oz.t.+shalt be an alternarive to the R_ialul, ii i"uj" ri+ 02.1.2.
.2INSULATION AND
TABLE R402.1
FENESTRATION REQUIREMENTS BY COMPONENT"
NR = Ns1 P"nu;t"d.
For SI: 1 foot = 304.g mm.
a. .l?-values are minimums. [/-factors and SHGC are maximums.Where insulation is installed in a cavity that is less than the label or design thickness oftable.
insulation,the installed R-value ofthe insulation shall be not Iess than the R-value specified in theb. The fenestration U-factor column excludes skylights. The SHGC column applies to all glazed fenestxation.Exception:In Climate Zones I through 3, skylights shall be permitted to excluded from glazed fenestration sHGC requirements pr.ovided that the sHGC
for such skylights does not exceed 0.30.be
c. "10/13"means R-10 continuous insulation on the interior or exterior of the home or R-13 cavity insulation on the interior of the basement wall.
"15/19 means R-15 continuous insulation on the interior orcompliance with ,,15/19" shall be R-13 cavity insulation on
9 cavity insulation at the interior of the basement wall.Alternativelyhome-wall plus R-5 continuous insulation on the interior or exterior of thed. R-5 insulation shall area of a heated slab in addition to the required slab edge insulation R-value for slabs. as indicated in the
table. The slab edge
e. There are no SHGC
be provided under the full slab
insulation for heated slabs shall not be required to extend below the slab.f. Basement wall
requirements in the Marine Zone.
insulation is not required in warm-humid locations as defined by Figure R30l.l and Table R301.1g. Altematively,insulation sufficient to fill the framing cavity and not less than an R_value of R-l 9.h. The first value is cavitv
contifluousinsulation. "insulation, the
providing
second value is continuous insulation. Therefore, as an example, "13+5" means R_13 cavity insulation plus R_5Ii' Mass walls shall be in accordance with section R402.2.5.The second R_value applies where more than halfofthe insulation is on the interior ofthe mass wall.
a
TABLE R402.1 .4
EQUIVALENT U.FACTORS"
NonfenesUation U-factors shall be obtained from measurement,calculation or an approved source_I b. Mass walls shall be in accordance with Section R402.2.5.Where more than half the insulation is on the interior, the mass wall U-factors shall not exceed 0.17
in Climate Zone , 0.14 in Climate Zone2,0.l2in Climate Zone 3, 0.0g7 in ClimateZone 4 except Marine,0.065 in Climate Zone 5 and Marine 4, and 0.057
in Climate Zones 6 through 8c. In warm-humid locations as defined by Figure R30r.1 and rable R301.1, the basement wail u-factor sha'not exceed 0.360.
exterior of the home or R_ 1
the interior of the basement
\
$
CLIMATE
ZONE
1
2
3
FENESTRATION
(AFACTORb SKYLIGHTb
UfACTOR
5
GLAZED
FENESTRATION
sHGCb'.
CEILING
B-VALUE
wooD
FRAME WALL
F.VALUE
MASS
WALL
F.VALUE'
I
FLOOR
F.VALUE
L3
13i
BASEMENT"
WALL
FI.VALUE
I stneo
F-VAIUE
& DEPTH
ol
SPACE"
WALL
R.VALUE
4 except
Marine 0.32 0.55 0.40 49
of
20 or 13+5h
3
8/13 19 10 n3 10,2 ft 10/13and
Marine 4 0.30 0.55 NR 49 20 or 13+5h
or
13/17 308 1s/19 t0,2ft t5/19
0.55-49 or 3+
lJIZU--TgiTr
3gc 1s/19-
r0, 4 ft
10, 4 tt 1sl19
CLIMATE
ZONE
1
2
3
4 except Marine
FENESTRATION
U.FACTOR
0..50
0.40
0.32
0.32
SKYLIGHT
U.FACTOR
0.75
0.65
0.55
0.55
CEILING
UfACTOF
0.035
0.030
0.030
0.026
FRAME
WALL
U.FACTOR
0.084
0.084
0.060
MASS WALL
U+ACTORb
0.197
0.165
0.098
FLOOR
U.FACTOR
0.064
0.047
BASEMENT
WALL
U+ACTOR
0.360
0.360
0.091"
CRAWL
SPACE WALL
U.FACTOR
4.477
0.477
0.1 36
S anO tvt*ine?-
6
7and8
0.30
0.30
0.30
0.5-5
0.55
0.55
0.026
0.026
0.026
0.060
-
0.060
-
0.045
-
0.045
0.098
0.082
--
0.060
0.057
0.047
0.033
0.028
0.059
0.050
0.050
0.050
0.065
0.055
0.055
0.055
R.30
2018 INTERNATIONAL ENERGY CONSERVATION CODE@
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tq.D&r3cnaftg !7rPF
lYhole House Block Load
Hot"l2T]l Sq. ft, -tyD6 f 8!d2 6brdin shdi!So.C-tvB I od2 so. fr
ouSdcvaftXodllr;0 tO Wirdow$ +0 2 0 Ohs Dors x DoG 0
ol&ndolr'.[:Sdrblltr0 AO Whdom lv 0 7 I GlsDodB t Y r{o lz{o Do6!0
orusiacuan: eawllr; g 2tQ Wia{or6 lv 0 ObssDoqrg le r{0 lzlo Door 0
oubidcWatLNE&Ns{h:5$ L.tt68 Window +127 70 GlasDoor x r@ldo D@6 20
outsid€wsu:sB&swllt;4618 2;560 Wis&ws le L GLssDoors Iv r{zo lzlo Doq N
flM-(iuft.ifdabth:1840 zz}Ccili4 r: 1584 2:0 Applistc6S FirEphB Ov
styti8esllN: O f:0 E-W: o NF-NW:0 SE-SW: O
NmbcrorPcoptdl 2 Cudidm€dSq- ft 1840 Ctbic Ft 20160
cltbicFL t3il40Basement Abov€grad$ wath 2 Delowgnde wdrs 2 Floor 1584 5q. n widt 30ft. ot v betw: 4 fl. v
Comtrctior: g@d Y TotNlE.dmK 2 Du{iqfs@ qv
-e -v
ninimrm f1s[ailrtcomcudc& 43cfin +12 CFM
Calsulate Loael
Total Btu's Cooling
20372
Scnsibte toad
19972
Iateil Load
400
ToaI Btt'sHeating
27925
Sensible Latent llcatinc
ralls 287 t693
rdndows n57 6525
:eilings t426 u28l
toors 235 805
iloons tu4 5786
upliances 6{n0
rcoplo 460 m0
lass doon 20r5 l5l3
ikvlishts 0 )
mserncntwalls 0 )
t8s@cdt floor 0 l
nfiltration 6t7 )
'/.89&€sh air 132 )t32
luct lond 0 0 )
fotak 19972 400 17925
Btu br'eakdown
O losd Elcddion $frweupdat { 1/12025
Structure tlpes
Outsid€ Walls l: Siding or Strcco f,ll insrtrricn
OusideWalls2:
Windows l: doublepaneno interflal shade
Windorvs 2:
Glass Doors l: dorible pane glass door
Glass Doors 2:
Floors l: closed orvented c,rawl R-15 insulation
Floor2:
Ceiling l: Ceiling urdcr atic spaca R-50
Ceiling2:
Doors: Wood solid with stotm
S&ylie[u:
Baseme'ntWalls:
BasomeotFloor:
Win ht: 6'8" Overtang:2' Top to overbang: 1.5'
: :,-'r'
.att
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