Document 0qyrq7o9yKQJngvrE9rybOB2d

American Society of Heating and Ventilating Engineers Guide, 1930 Table 23. Coefficients of Transmission (U) of Brick Veneer on Cinder and Concrete Block Walls c Note.--These coefficients are expressed in B.t.u. per hour per square foot per 1 dbg. fahr. DIFFERENCE IN fEUPBRATURB BETWEEN THE AIR ON THE TWO SIDES AND ARB BASED ON AN OUTSIDE WIND EXPOSURE OF 15 BULBS PER HOUR. The values df U m this Table are basedon the fallowing JritemoiConductivities or Conductances which are expressed in per Ur perSq.Ft.perl*F Cinder Blocks -0.45 Concrete Blocks 8*-0.84 11"- 0.1% IT." 0.52 Brick Cement Mortar 5.00 perl* 8.00 per 1" Plaster board Plaster (Gypsum) Wood Lath 4 Piaster Corkboard Rtqid Insulation (Boardform) . Cellular Gypsum (IS*} Floked Gypsum,Ory (24*) 3.73 per^ 2.3Z perl' 2.00asapplted 0.30 perl* 0.33 perl' 0-34 perl" 0.48 perl' Y-Thickness of Insulation wherespecifted J./J p r) ^ Cement Mortar Number Interior Construction Thickness--X and I4inddf Blocks V 8"Cinder B Concrete ll"Cmder ttTConcrete A B c0 i Ram Walls - No Interior Finish 0.245 0.328 0.184 0.264 2 Plasteron Blocks 0.233 0.306 0.177 0-250 3 ~ Plasteron Metal Lath-Furred 0.188 0.234 0.150 a 199 4 Rasteron Wood Lath - Furred 0.182 0.224 0.146 0.192 5 ^ Rasteron^ Rasterboard-FUrred 0.183 a ^ Plasteron Wood Lath on 2* Fumrx^Stnps 6 -Cellular Gypsum Fill b ii" 0.136 a \ Rasteron Wood Lath on Furrmq Strips 7 -- Flaked Gypsum Fill >5 0.125 0.225 0.147 0.158 0.115 0.144 0.107 0.193. 0.142 0.130 8 5 Plaster on Riqid Insulation -- (Boardform) Furred 9 10 2 Plasteron Cork board set m *5; Cement Mortar II 1" Z 0.149 1" 0.121 li" 0107 2 0090 0.176 0.124 0.156 0.139 0.104 0.126 0.120 0.093 0.1(0 o,ioo 0.081 0.093 Based on IK in., the actual thickness of 2 in. furring strips. ' bThe coefficient used for cellular gypsum, 0.59 is for 18 lb. weight---weights as low as 12 lb. may be used. eThe form of the 8 in. blocks on which the figures in this table are based is shown in the above sketch. The 12 in. blocks are based on two air cells through the block instead of one. 46 Chapter 2--Heat Losses from Buildings Table 24. Coefficients of Transmission (V) of Wood Siding or Clapboard Frame Walls ___THBSS COEFFICIENTS ARE EXPRESSED IN B.T.U. PER HOUR PEE SQUARE FOOT PER 1 DEG. FAHR. DIFFERENCE IN TEMPERATURE BETWEEN THE AIR ON THE TWO SIDES AND ARE BASED ON AN OUTSIDE WIND EXPOSURE OF 15 MILES PEE HOUR. The values ef U mthisTable arebasedonthe foHowmq Internal Conductivities orConductances which are expressed m B.t.u. per Hr per Sq. Ft. per 1" F Wxid (Yellow Pineor Fir) >l.00 -p*er-1f" Plaster (Gypsum) Plaster board 3.13 per Cork board Wood Lath 4 Plaster Riqid Insulation(Boardfbrm') Flexible Insulation Cellular Gypsum (18*) Flaked Gypsum (Z4") 2.32 per l" 2.80 per jf 0 30 per I* 2.00 asapphed 0.33 per l" 0-27 per I* 0.59 per I" 0-48 per I" Typical Construction 2`*4` Studs ^ VfaodSldmCj- Sheatlninq/ ; Planter Base TV0- Sgi 3 Sheathtnq 2 Insulation between Studdinq Jood Lath A detql Lath _ B ; i* \"k taster-1 tiqid 1 iqtd 1 *ork- x>ard 1 nsulatton 1 nsulation ward c D 'E F CI <^ork- 1 board | GI i None 0.262 0275 0.263 0.I9& 0.153 0.117 0.098 I 2 .b 1 Wood 3 Flaked Gypsum Fill (Z4*) a 0.0% Cellular Gypsum Fill (18*) '-c am 0098 0.113 0.0% am 0.086 a 097 QO76 0085 Q067 0.073 0060 1 0.065 1 4 5 ir" Flexible nsulation ^ A None 0152 0.157 0.153 0.128 0.107 0.089 0.077 1 0220 0.229 0.221 0173 0.137 0,108 0.0921 f ttiqid (0 Flaked Gypsum Fill (24*) * 0.090 0091 0.090 0.081 0.072 0.063 0.058 L 7 (Board form)' Cellular Gypsum Fill 0&*-) a'c 0.102 a 104 0.103 0.090 0080 0069- 0.062 | 8 - ^Flexible Insulation 0.137 0.140 0.137 0.117 0.099 0.083 0.0731 9 None 0.295 0.312 0.297 0.216 0.163 0.123 0.1021 4* Plaster10 II 12 Flaked Gypsqm Fill (Z4*) a 0.099 0.102 0.100 0.089 0.079 0.068 0.0621 Cellular Gypsum Fill (I8#) a'c 0116 0.U8 0.U6 0.102 0.088 0.075 0.067.| f Flexible Insulation 0.163 0.167 0.163 0.135 0.H2 0.092 Q.Q8o| Thickness of fin assumed 3% in., based on 2 in. by 4 in. studding. bBased on in., the actual thickness of 1 in. or J4 in. sheathing. Building paper neglected. The coefficient used for cellular gypsum, 0.59 is for 18 lb. weight--weights as low as 12 lb. may be used. 47