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<br />WINTER POINT MULTIPLIERS (WPM)
<br />
<br />9B WINTER OVERHANG FACTORS (WOF)
<br />
<br />CLIMATE ZONES 4 5 6
<br />
<br />~ OH RATIO ,0 .11 1,12 ,17 I .18 .26 .27 .35 I ,36.46 I .47-.57 1.58 ,70 ,71 ,83 ,84 1.18 I 1.19- 1.72 I 1 73 -,)? I 2.74+
<br />, SINGLE PANE GLASS
<br />, N 1.0 1.03 1.05 ,1.08 1.10 1.13 1.15 1.18 1.20 1.24 1.29 1.34
<br />,
<br />, NE/NW 1.0 1.07 1.10 1.15 1.20 1.25 1.30 1.35 1.39 1.50 1.59 1.67
<br />,
<br />, E/W 1.0 .71 ,57 .19 -.20 -,65 -1.05 -1.48 -2.03 -3.01 -4,06 -5.04
<br />, SElSW .93 .90 .80 .68 .54 .39 .22 .05 -.33 -.71
<br />>-. 1.0 -1.01
<br />CD, S 1.0 ,95 .92 .83 .70 ,54 ,36 ,13 -,13 -.70 -.I1ll -1.09
<br />frl~ DOUBLE PANE GLASS
<br />uJ'
<br />(/), N 1.0 1.05 1.07 1.11 1.14 1.18 1.21 1.24 1.28 1.34 1.40 1.47
<br />, NE/NW 1.0 1.11 1.16 1.24 1.32 1.41 1.48 1.56 1.63 1.80 1.94 2,08
<br />,
<br />, E/W 1.0 .88 ,82 .66 .50 .31 .15 -.03 -.26 -.66 -1.10 -1.50
<br />,
<br />, SE/SW 1.0 .95 .92 .85 .76 .65 ,54 .41 ,28 -,01 -.30 -,52
<br />,
<br />, S 1.0 ,96 .94 .87 .78 .65 .51 .33 .13 -.30 -.51 -,60
<br />. OH LENGTH' Oft. 1 ft, 11h ft. 2 II. 3 II. 31h II. 41h 1\ 51h 1\, 61h II. 91h 1\. 14 It. 20 fl. +
<br /> . To select by Overhang Length, no part of glass shall be more than 8 II. below the overhang.
<br />OIERHANG RATIO = OH LENGTH ~~~ 41T
<br />OH HEIGHT
<br /> r k-L r
<br /> H 0-1 H
<br /> J j
<br /> T~ I
<br />
<br />I
<br />
<br />.~
<br />
<br />~~
<br />
<br />~
<br />I
<br />
<br />I
<br />~
<br />FA
<br />
<br />9C WAll WINTER POINT MULTIPLIERS (WPM)
<br />FRAME
<br />
<br />
<br />CONCRETE BLOCK t
<br />INT. INSULATION EXT. INSUL
<br />NORMAL WT. NOR. WT,
<br />EXT ADJ EXT
<br />6.0 3.1 6,0
<br />3.8 2.3 2.8
<br />2,9 1.9 2.0
<br />2.3 1.5 1.5
<br />1.5 1.1 ,8
<br />,8 .7
<br />.5 ,5
<br />
<br />WOOD
<br />EXT
<br />6.8
<br />2.5
<br />2.0
<br />1.8
<br />1.1
<br />.7
<br />
<br />STEEL
<br />EXT ADJ
<br />9.4 6.7
<br />4.4 3.3
<br />3.3 2.6
<br />3.0 2.4
<br />2.6 2.2
<br />1.4 1.2
<br />
<br />LOG
<br />8 INCH
<br />R.VALUE
<br />0-2.9
<br />3.6.9
<br />7 & u
<br />8 INCH
<br />R.VALUE
<br />0-2.9
<br />3. 6.9
<br />au
<br />
<br />R.VALUE
<br />0- 6.9
<br />7 -10.9
<br />11 -12.9
<br />13.18.9
<br />19 - 259
<br />26& U
<br />
<br />ADJ
<br />5.3
<br />2.1
<br />1.8
<br />1.6
<br />1.0
<br />.7
<br />
<br />EXT
<br />2.2
<br />1.2
<br />.9
<br />
<br />EXT
<br />1.2
<br />,9
<br />.7
<br />
<br />90 DOOR WINTER POINT MULTIPLIERS (WPM)
<br />
<br />DOOR TYPE EXTERIOR ADJACENT
<br />WOOD 7.6 5.9
<br />INSULATED 5.1 4.0
<br />
<br />9E CEILING WINTER POINt MULtiPLIERS (WPM)
<br />
<br />UNDER ATTIC SINGLE ASSEMBLY
<br />R.VAlUE WPM R.VAlUE WPM
<br />19 - 21.9 1.0 10 -10.9 1.8
<br />22.25,9 ,9 11.12.9 1.
<br />26 - 29.9 ,7 13 - 18.9 1.5
<br />30 - 37.9 .6 19 - 25.9 1,1
<br />38 & U .6
<br />
<br />CONCRETE DECK ROOF
<br />CEILING TyPE
<br />DROPPED EXPOSED
<br />1.2 1.3
<br />,7 .7
<br />,4
<br />
<br />
<br />.'
<br />9F FLOOR WINTER POINT MULTIPLIERS (WPM)
<br />
<br />9G INFILTRATION WINTER POINT MULTIPLIERS (WPM)
<br />
<br />. Return Ducts Return Ducts
<br />A-Value In Uncondltlon~ Space In Condltion~ Space
<br />Supply 4.2-5.9 1.14 1,10
<br />Ducts In 6.0-6.6 1.10 1.07
<br />Unconditioned Space 6.7 & up 1.09 1.06
<br />Supply 4,2-5.9 1.10 1.00
<br />Ducts in 6.0-6.6 1.07 1.00
<br />Conditioned Space" 6,7 & up 1,06 1.00
<br />
<br />INFll TRA TION PRACTIC'l: WPM
<br />(See Tlblll 9P)
<br />PRACTICE # 1 6.2
<br />PRACTICE # 2 4.1
<br />PRACTICE # 3 2.2
<br />
<br />t For multipliers for other types of concrete block construction see section 903.2(b),
<br />2 For multipliers for other types of raised wood assemblies See section 903,2 (e) "
<br />3 Ducts In conditioned space need to be insulated only to the R-Value necessary to prevent condensation.
<br />-5 -
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