Document rey9wyMYJXKOokoOEv7OeZOQe

American Society of Heating and Ventilating Engineers Guide, 1930 Chapter 2--Heat Losses from Buildings Table 13. Coefficients of Transmission (U) of Brick Veneer on Hollow Tile Walls c Note.--These coefficients are expressed in B.t.u. per hour per 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 PER HOUR. -r.n, h 14 Coefficients of Transmission (t/) of Brick Veneer on Iablb it. Concrete Walls Note.--These coefficients are expressed in B.t.u. per hour per square foot per 1 deg fahr difference in temperature between the air on the two sides and ARE BASED ON an outside wind The values c?f 0 in thisTable are basedon the following exposure of 15 MILES PER HOUR. Internal Conductivities or Conductances which are expressed in B.t.u. per Hr per Sq.ft, per I'F Hollow Tile &'-O.S4 8"-a4q io'.a4fe I2\Ol33 Brick. 5.00 perl" Cement Mortar 8-00 perl" Plasterboard 3.73 perf Plaster (Gypsum) 1.51 perl" Wood Lath { Plaster 2.00 as applied Corkboard 0.30 perl" Biqid lnsulation(&Dardform) 0. 33 perl" CellularGypsum (18} 0- 51 perl" 1 Flaked Gypsum, Dry (14*) 0.48 perl" Y-Thickness of Insulation where specified -I Cement Mortar Interior Thickness of UollowTile B Construction Y 8" 10" 11" Plain Walls - Ho Interior Finish 0.110 0.257 0.248 0.205 The values of U inthisTableare based.on the fotlowmq InternalConductivities or Conductances which are expressed in B.t.u. per Hr. per Sq. Ft. per I*F Concrete (Stone 1:2:4 mix) Brick Cement Mortar Plasterboard, Plaster (Gypsum) Wood Lath 4 Plaster Corkboard Riqid Insulation (Boardform) 8.SO per 1" 5.00perf 8.00 per 1" 3.73per^ 2.32 per 1" 2.00asapplted 0.30perl' 0.33perl" Cellular Gypsum(l8*) FlakedGypsum, Dry (24*) 0.51perl" 0.48perl" Y-Thickness of Insulation where specified X41. JE3i Interior Construction Y z 4"J * . 4 0 TisA `4* 4 * > A i) d tCemertt Mortar Thickness of Concrete-X. 6" 8" AO" 12," A. B C D u&" E 1 Plain Walls - Mo Interior Finish 0:387 0.355 0.327 0.303 0.264 Plaster on UollowTile 0.254 0.243 0.235 0.1% 2 -L Piaster on Concrete 0.358 0.330 0.305 0.285 0.250 Plaster on Metal Lath - Furred 0.202 0.195 0.190 0.163 3 ^ Plasteron Metal Lath - Furred 0.263 0.247 0.233 0.2ZI 0.200 j Plaster on Wood Lath - Furred 4 Plaster on|* Plaster board - Furred 2. Piaster on Wood Lath on 2." Furrmq Strips - Cellular Gypsum Fill b 0.195 0.188 0.I&4 0.15*1 0.198 0.189 0.185 .0.159 0.144 0.140 0.137 0.123 2 Plaster on Wood Lath on 2" Furrmq Strips - Flaked Gypsum Fill 0.131 0:128 0.126 0.U4 2 Plaster on diqid Insulation (Board form) Furred 10 x Plaster on Cbrkboard set in Cement Mortar II 0.158 0.127 0.153 0.150 0.124 0.122 0.133 0.110 lx 0.112 O.llO 0.107 0.098 0.094 0.092 0.091 0.085 aBased on in., the actual thickness of 2 in. furring strips. bThe coefficient used for cellular gypsum, 0.S9 is for 18 lb. weight--weights as low as 12 lb. may be used' The 6 in., 8 in. and 10 in. tile figures are based on two cells in the direction of flow of heat. The 12 in. tile is based on three cells in the direction of flow of heat. \- 4 2 Plasteron Wood Lath -- Furred 0.250 0.237 0.224 0.213 0.192 5 4- Plover on \ Plaster board--Furred 7* T PIasteron Wood Lath on Z`Furrmq Strips <o -CellutarGvpsumFill b 0,252 0.238 0.225 0.213 0.192 <X 0.172 O.A65 0.158 0.152 0.142 a >I`7 4 Plaster on Wood Lath on Z'Furrmq Strips - Flaked Gypsum Fill 0.154 0.149 0.144 0.139 0.130 8. 4: Plaster on Rtqid Insulation -- 8 (Board form) Furred 10 T Plaster on Cork board set m 11 Cement Mortar 2 0.192 0.183 0.175 0.168 0.156 r 0.148 0.143 0-139 0.134 0-126 0.127 0.123 0.120 0.U6 0.110 2.* 0.105 0.102 0.100 0.098 0:093 Based on 1% in., the actual thickness of 2 in. furring strips, f. bThe coefficient used for cellular gypsum, 0.59 is for 18 lb. weight--weights as low as 12 lb. may be used. 36 37 '-`eLlMisT