Document 7QaJ5qpEQNDpwkG9ywk308rB

American Society of Heating and Ventilating Engineers Guide, 1932 Table 12. Coefficients of Transmission (V) of Hollow Tile Walls with Stucco Exterior Finish *>-<1 Note.--These coefficients are expressed in Btu per hour per square foot per 1 deg fahr DIFFERENCE IN TEMPERATURE BETWEEN THE AIR ON THE TWO SIDES AND ARB BASED ON AN OUTSIDE WIND EXPOSURE OF 15 MILES PER HOUR. The values of U inthisTable are basedon thefollowinq Internal Conductivities or Conductances which are expressedm per Wr perSq.Ft. per TF Stucco WollowTile 8"0.4<1 IO* 0-44 Cement Mortar Raster board Raster (Gypsum) WoodLath ^Plaster Corkboard Riqid Insulation (Boardform) 8.00 perl" \2"=0.*l iG?0.25 8.00 perl" 3.73 perl* 1.11 per? 2.00 osapplied 0.30 perl" 0.33 perf Cellular Gypsum (18*) Flaked GypsumDry(24*) aSSpert' 0.48perT Y- Thickness of Insulation where specified _0LQ 0 Interior Construction 'Z l Plain Walls - No Interior Finish Thickness of WollowTile--X Y 8" A io" \T \<o BCD Q3I7 a 304 0.241 aiq5 2 T Plaster on WollowTile 3 % Plaster on Metal Lath -- Furred A j Plaster on Wood Lath -Furred Q 216 0.285 Q22q 0.188 0.Z28 0.221 0.186 0158 o.ziq 0.213 0.180 0.153 5 -j Plaster on & Plasterboard - Furred 4 Plasteron Wood Lath on 2* Furrmq 6 Strips -- Cellular Gypsum Fill c 4 Plasteron Wood Lath on 2" Furrmq 7 Strips -- Flaked Gypsum Fill GZ20 0.213 a ai5fo 0.153 0.180 0.153 0.135 0.120 a >r 0.141 o.m 0.124 o.m 8 2 Plasteron Giqid Insulation -- (Board form) Furred S i" 2 0.172 0-16.8 0.147 o.i2q r 0.137 0.134 0.120 0.108 lO ^ Raster on Cork board set in ^ Cement Mortar II auq 0.117 0-106 o.oq6 2 aoqq o.oqs o.oqo 0.083 Based on 1% in., the actual thickness of 2 in. furring strips. bFigures on this page can be used with sufficient accuracy for hollow tile walls without stucco finish. cThe coefficient used for cellular gypsum. 0.59 is for 18 lb. weight--weights as low as 12 lb. may be used. dThe 8 in. and 10 in. tile figures are based on two cells in the direction of heat flow. The 12 in. tile is based on three cells in the direction of heat flow. The 16 in. tile consists of one 10 in. tile and one 6 in. -tile, each having two cells in the direction of heat flow. 44 Chapter 3--Heat Transfer Through Materials and Constructions- Table 13. Coefficients of Transmission (/) of Limestone or Sandstone Walls Note.--These coefficients are expressed in Btu per hour per square foot per- 1 deg fahr DIFFERENCE IN TEMPERATURE BETWEEN THE AIR ON THE TWO SIDES AND ARB BASED ON AN OUTSIDE WIND EXPOSURE OF 15 MILES PER HOUR. Thevalues of Uin this Table are based on thefollowinq Internal Conductivities or Conductances which are expressed in B.tu. per Ur perSq.Ft.per l*F Stone 10.00 per l" Cement Mortar Plasterboard 8.00 per 1* 3.73 per Plaster (Gypsum) 2.32 peri" Wood Lath t Plaster 2.oo as applied Cork board 0.30 per l" Riqid Insulation (Boardform)0.33 perl* Cellular Gypsum (18*) Flaked Gypsum, Dry (24*) O.sq perl" 048 perl" l. yi ---- Y* Thickness of Insulation where specified b .O Interior 1 Construction z l Plain Walls -No Interior Finish Y 8" A Thickness of Stone -X IO* 12." \G>~ 20` & c DE 24" F 0.556 0.502 0.457 Q385 0334 0.245 z 4 Plaster on Stone 0.4*17 0.452 0.415 0.356 0.311 can 3 i Plasteron Metal Lath -- Furred 0.330 0.310 0.242 0.261 0.236 0.216 4 4. Plaster on Wood Lath - Furred 5 \ Plasteron Plaster board-Furred 0.312 0.244 0-277 0250 0.227 0.208 0.314 0.245 0.274 0.251 0.228 0.204 4 2"Raster on Wood Lath on Furrmq 6 Strips-Cellular Gypsum Fill b a r 0.148 0.141 0.1&4 0.01 0.160 0.150 4 Raster on Wood Lath on 2" Furrmq 7 Strips -- Flaked Gypsum Fill a \*V8 0.175 0.164 0.163 0.153 0.145 0437 8 "Z Raster on Rtqtd Insulation (Board form) Furred 4 to 4 Plasteron Corkboard set Cement Mortar ii 2l" 0.225 0.216 0.207 0.141 0.177 0.166 r 0.168 0.163 0.157 a 148 0.140 0.132 a 141 0:138 0.134 0.127 0.121 0.115 2." 0.114 0.112 0.104 0.105 0101 0.048 Based on 1% 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. 45