Document gDLvQwyNwrr9yzGwVGaEqojMa

Number Number TT. r' American Society of Heating and Ventilating Engineers Guide, 1931 Table 22. Coefficients of Transmission (17) of Wood Shingle Frame Walls NoU.--These coefficients are expressed in B.t.u. per hour per square foot per 1 dbg. fahr. DIFFERENCE IN TEMPERATURE BETWEEN THE AIR ON THE TWO SIDES AND ARE BASED ON AN OUTSIDE WIND EXPOSURE OF 15 MILES PER HOUR. The values of U in this Table are basedon thefollowmq Internal Conductivities orConductances which are expressedin B.tu. per Ur. per Sq.Ft. per \F Wood CtfellowPmeor fir) 1.00 per I" Plaster (Gypsum) 2.31 per I" Plaster board 3/73 per 2.80 per Cork board WiodLath d Plaster 0.30 per 1" 2.00 asapplied Riqid Insulation (Board"form^ 0.33 per r Flexible Insulation 0.27 per I" Cellular Gypsum (18*} 0.59 per l` FI ake d Gypsum (24*) 0.48 per I* Typical Construction iW 5tuds - WoodShmqleSv lr Shealhwq Insulation between Studdmq Wood LatW A Metal Lath B . PI a ster Base *' L- Z r it Plaster Rjqid Riqtd Cork- board Insulation Insulation board c DEF Z" Corkboard G 1 None 0.262 0.275 0.263 0.198 0.153 0.117 0.098 2 l Wood c 3 4 Flalced Gypsum Fill (24') a 0.096 0.09& 0.096 0.086 0.076 0.067 0.060 CellularGypsum Fill (18*) *'d 0.111 0.113 0. Ill 0.097 0.085 0.073 0.065 ^"Flexible Insulation 0.152 0.157 0.153 0.128 0.107 0.089 0.077 5 None 0.183 0.190 0.184 0.150 0.122 0.098 0.085 (o 1 IZiqid Insulation FlakedGypsum Fill (24*) * 0.083 0.084 0.083 0.076 0.068 0.060 0.055 7 (Board-form) b CellularGypsum Fill OB*) *'<i 0.094 0.095 0.094 0.084 0.075 0.065 0.059 8 2 Flexible Insulation 0.1-22 0.125 0.122 0.106 0.091 0.077 0.069 9 None 0.233 0.243 0.234 0.181 0.142 0.111 0.094 10 \ Plaster board b II F2 Flaked Gypsum Fill (24*) a o.o9i 0.093 0.092 0.083 0.014 0.065 0.059 CellularGypsum Fill 08*) a-d 0.105 0.107 0.105 0.093 0.081 0.070 0.063 Flexible Insulation 0.142 0.146 0.142 0.12! 0.102 0.085 0.074 Thickness of fill assumed 3% in., based on 2 in. by 4 in. studding. bFurring strips between wood shingles and sheathing. oBased on in., the actual thickness of 1 in. or K in. sheathing. Building paper neglected. dThe coefficient used for cellular gypsum, 0.59 is for 18 lb. weight--weights as low as 12 lb. may be used. 58 Chapter 3--Heat Losses by Transmission Table 23. Coefficients of Transmission (CO of Stucco Frame Walls ___these coefficients are expressed in B.t.u. per hour per square foot per 1 deg. fahr. : jv, TEMPERATURE BETWEEN THE AIR ON THE TWO SIDES AND ARB BASED ON AN OUTSIDE WIND SSSSSoF 15 MILES PER HOUR. The values of U in this Table are basedon the followinq Internal Conductivities or Conductances which are expressed in B-tu. per Hr per Sq.Ft. per I'F Vdjod (\fellow Pine or Fir) 1.00 perl" piaster (Gypsum), 2.32 per i; Plasterboard 3.73perj 280 peri Cork board Wood Lath t Plaster 0-30 perl' 2.00 asapplied Riqid Insulation (Board form) 0.33 perl' Flexible Insulation Cellular Gypsum. (18*) Flaked Gypsum (24*) 0.27 per 1"' 0.51 per r 0.48 per 1' Brick Stucco 5.00 perp 8.00 per 1 Typical Constr uction \ Sheathtnq v l'( tucco^ JW`51 uds 1( // "type or Sbeathinq Insulation between Studdihq Wood Lath Metal Lath Plaster Base r Li" r i Plaster Eiqid Hiqid Cork- board Insulation insulation board ABcDE F V Corkboard G ( T Wood b .None a 302 0.319 0.304 0.220 0.165 0.125 0.103 Z Flaked Gypsum Fill (24*) a aioi 0.102 0.101 0.089 0.079 0.068 0.061 3 Cellular Gypsum Fill (18*) a'c 0.117 0.120 aii7 0.103 0.089 0.075 0.067 4 V* Flexible Insulation 0.165 0.169 0.165 0.137 0.113 01093 0.080 5 k-iqtd Insulation (Board form) 6 None 0.247 0.259 0.248 0.190 QI47 0.114 0.096 Flaked Gypsum Fill (24*) a 0.094 0.095 0.094 0.084 0.075 0.065 0058 Cellular Gypsum 7 Fill (l&*) tt-c 0.108 0.110 0.108 0.095 0.083 0.072 0.064 8 Flexible Insulation 0.147 0.151 0.147 0.125 0.105 0.087 0.076 9 4 Plaster board 10 II |2 None 0.347 0.369 0.349 0.243 6.178 0.131 0.108 Flaked Gypsum Fill (24*) a 0.105 0.107 0.105 0.093 0.081 0.070 0.063 Cellular Gypsum fill (18*) a-c 0.123 0.126 0.124 0.107 0092 0.078 0.069 4" Flexible Insulation , Q177 0.183 0.178 0146 0119 0.097 0.083 Thickness of fill assumed 3% in., based on 2 in. by 4 in. studding. kBased on in., the actual thickness of 1 in. or J4 in. sheathing. Building paper neglectedl cThe coefficient used for cellular gypsum, 0.59 is for 18 lb. weight--weights as low as 12 lb. may be used.