Document 3QBO2m8kByX3mbE6K2Kj2Q8R6

434 CHAPTER 24 irtw vTuiae Ana uata I Tab!* 9 ... . CoefuCrenfi of Truuwmiiiort {(/}.<jt Frame Fa'rnriotts or interior Wails* Cotffldwh era ixpnmd fa Bftr per (hour) (sqvera foot) (fduwfag cfagne diffieranra fa haptrefai between Mm exr on At two diet), aad era based on S0 air (no wind) cootCfiora oo bofl> dde* Cxanspie--Wefl & 1 Resistances used are given helots in this table or in Table S or 4 Construction ` Resistance (R) 1. Surface (still air)..'............................................ 0.68 2. Gypsum bd. (5< in.)___;......................:___ _ _ 0.88 3. Air space*................ 0.$7 4. Gypsiim wall board (|4 in.).'.......................... 0.88 5. Surface (still air).............................. 0.68 Total'resistance..'.............................................. 8.97 . U - t/R - 1/8.97.............................. 0.34 See value 0.34 in boldface type in table below. Resistances used are given helots in this table or in Table S or 4 Replace item 2 with wood fiber hardboard @4 ii Totalresistance.......................................... Deduct 2. Gypsum wall board (54 in.)... .). 8.07 0.88 Difference...................... Add 2. Hardboard (K in-) - - 8M 0.18 Total resistance................... .V - 1/R - 1/8.88 -.............. .8.83 0.35 To Adjust U Vehies for Censhoetion with Added huuleti00 between Members! See Table 16 Type of Interior Finish Gypsum bd. ($4 in.)............................................................ Gypsum lath (% in.), and 54 in. plas..(It. wt. agg.)-- Gypsum lath (54 in.) and J4 in. plas.(sand agg.)' - . Metal lath and % in. plas. fit. wt.agg.)........................ Metal lath and H in- plas. (sand aggj........................... Insul. bd.-04 in.)......'..........................'.......... Insul. bd.'.lath 04 in.) and 54 plas. (sand agg-V-----Plywood: ^ |n.):.: Wood panels 04 in.)................. ........... ............ Wood-lath and 54 in. plas. (sand agg.).............. . Sheet-metal panels,adhered to wood (framing) Glass and glass blocks............ ......... . * racOen Oelcnfatiaf OreteU Coeffioeate tor tmm ot T *dia3t U. Tlue* the aet of added i&suUtioB between frmmin* members, (Tebfaft.. Single PerftfioA (Rnidi Doable Partition on Oniy One Side (Finish on Beth of Studs) Sides of Studs) R 0.88 0.64 0.41 0.47 0.18 1.43 1.68 0.81 0.47 0.63 0.94 ' 0.40 0 u-... A 0.60 0.50 . 0.56 0.55 0.67 0.36 0.35 0.60 0.55 0.50 " 0.43 0.57 0.74 ; - .U B 0.34 0.28 0.32 0.31 0.39 0.19 0.19 0.34 0.31 0.28 0.24 0.32 0.43 j , , (Continued from p. 481) ; -- - "VB'TTjLATED Arnes--HOW TO USE TABLE, 17 'ing resistance should be-that which applies to the complete . ceiling-floor, construction. ` -Table 17 is intended to be used with Table 11, Part D of <; Table 16, end Fig. 4, or when ceiling resistance is known. Its purpose is to determine the resistance to heat flow of the attic r space under various conditions of ventilating air temperatures ~and rates, ceiling instance, roof or sol-air temperatures, and' surface emissivities.* Ventilating air temperature is the out 'All values'in Table 16, Part D, include the resistance.of a non-reSective surface .fairing.the attic space. Therefore, if --separate calculations are made, include only the value of a non-reflective surface and not the value of a reflective surface ' in determining ceiling resistance. The use of Table 17, Part B, will account for this reflective surface. door design temperature.. . : > * ? Example 8: Determine the beat gain for a 1000 sq ft ceiling The total resistance, il/U, obtained by adding the* ceiling v. of f-in.' gypsum board and J4n. lightweight aggregate plaster : '' with no flooring above, when insulated with a JMn. Toil^enclosed "and attic resistances can be converted to'a U value'so that ihe - - fibrous blanket.-The blanket is installed so as to form a reflective beat gain may be calculated. The applicable temperature dif- air space between the ceiling end the blanket' The'attic has a ference is- that;difference between room air and sol-air tem- Able roof which'meets the:ventilation requirements in Table 3, _ perature or between room air mid roof temperatures. (See footnoted, Table 17.) ' Chapter 23. (Use ventilation rate of 0.1 elm per sq ft.) Design temperatures are: indooT air ~ 75 F, outdoor air a 95 ` F, and sol-air -- 160 F. Table 17 may be used for both pitched and flat residential roofs over attic spaces. When there is as attic floor, the ceil* - ' (Continued on p. 448) Heat*Transmilon:C6efRdents Design 435 -'Table 10 .. l. Coefficients of Transmission (U) of Masonry ruilifSons* ` CnhSdetds are expressed fa 8fo per (hoot) (tqoara foot) (Fahrenheit degree difference at temperature between the air on the two sides), and are'based on stSO air (no wind) conditions on boMl od&i Example--Wcfl C 2 Exoapfa of SubitMvfioo Resistances used are given helots in this table or in Table 3 or 4 .''Construction ' Resistance (R) .' '1.-Inside surface (still air)'.'.-.!........................ ... 0.68 2. Plas. (It. wt. agg.) % in....................................0.89 .3. Cement block icinder agg.)`(4 in.)........... l.lt * 4.-Plas. flt.'wt. agg.^ $4 in.......... . 0.89 : 5. Inside surface (still air)................................... 0.68 Total resistance.'............................. U - 1/R - 1/3.86 ........... ' ... 8.86 0.31 See value 0.31 in boldface type in table below. Resistances used are given helots in this table or in Table 3 or j Replace item 3 with gypsum tile (4 in.) Total resistance ........................................ . Deduct 3. Cement block (cinder agg.) (4 in.) 5.35 1.11 Difference'..,-.............................................. Add 3. Gypsum tile (4 in.)..V................. 8.14 : 1.67 Total resistance....... U -1/R - 1/8.81 . 8.81 . 0.26 Type of Parfifioa Plot, (it wt. agg.) 54 fa- Ras. (sand agg) 54 Two tides 0.78 Hollow concrete .block (Cinder agg.) , (3in.).................... (4 in. ............. (8in.)...r------ - (12 in.).................... ` (Lt. wt; agg.) . --(3in.)...'.............. (4 in.)-.. (12 in.).. (Gravel agg.) : (8 in.).-.... (12 in.)......... Hollow clay tile (3 in.)........... (4 in.)........... (6 in.)........... Sin.).. Hollow gypsum tile - O in.).. (4 in.)....,......... Solid plaster walls Gypsum lath 04 ) and plas. ` % in. each side (Lt. wt. agg.)....................... (8and aggO........................... i.il 1.78 1.87 1.60 8,008.87 1.11 1.88 0.80 l.lt 1.68 1.86 '1.86 1.67 0.45 0.40 0.32 0.31 0.38 0.35- 0.40 0.38' 0.48 0.40 0.35 0.31 0.37 0.33 :.t.S9 0.71 0.36 0.48 1 in. each side H.t. wt. agg.);.:-....;.:----- (Sand aggO........................... - Metal lath and plas.b 2 ini total thickness (Lt. wt.agg.)............ . (Sand agg.).... ` :- - 2)4 in. total thickness (Lt. wtt-.` a^j'g.) (Sand agg. 1.73 0.81 1.88 0.86 1.60. 0.46' 0.32 0.46 0.38 0.58- 0.34 0.55' Glass and gl blocks. k See text eeeUao Orarall CccfficfaaU for ben of eelwiietiora. - bUeteleanesdsapg(tedsRsetded. Plestei tnwefad mooSb both eidee. 0.38 0.35 0.29 0.27 0.33 0.31 0.27 0.25 0.35 0.33 0.39 0.35 0.31 0.28 0.32' 0.29 0.33 0.31 0.26 0.25 0.43 0.39 0.31 0.30 0.30 0.27 0.24 0.23 0.36 0.34 0.29 0.27 0.31 0.29 0.34 0.31 0.27 0.25 0.29 0.26 - 0.41 0.37 0.30 , 0.29 0.35 0.32 0.28 0.26 0.37 Q.35 0.42 0.37 0.32 0.29 0.34 0.31 9 10 13 14 16-' ' 16 17. 18 S3 24