Document eD4qmme1RkwEndBO3x9yENm4

American Society of Heating and Ventilating Engineers Guide, 1930 Table 15. Coefficients of Transmission (U) of Hollow Tile Walls with Stucco Exterior Finish b-d .Note These coefficients are expressed in B.t.u. per hour per square foot per 1 dec phr DIFFERENCE IN TEMPERATURE BETWEEN THE AIR ON THE TWO SIDES AND ARE BASED ON AN OUTSIDE WIND EXPOSURE OF 15 MILES PEE HOUR. wutoiu* WU.U Tbe.yalues of U in this Table are based on the following Internal Conductivities or Conductances which are expressed in Ext.u. per Mr per Sq.Ft per l"F Stucco 8-00 perl" HollowTile 8".0.4=1 io*.0-46 12".033 If-025 Cement Mortar Plaster board Plaster (Gypsum) VJcwdLakh<Raster Cork board Riqid Insulation (Boardform) 800 perl`_ 3-73 per 2* 2.32 perl* 2.00asapp1ied 0-30 perl' 0.33 perl* Cellular Gypsum (16**) Raked Gypsum, Dry(24") 0.54 perl* <X48perf Y-* Thickness of Insulation where specified Interior Construction Rain Walls -- Wo Interior Finish Thickness of Mallow Tile--X Y 8* IO* 12* Kb" B Q3I7 Q304 0.241 ans i Raster on WollowTile 7 Plaster on Metal Lath - Furred 2 Roster on Wood. Lath - Furred ^ Raster on ^ Plasterboard-Furred i Rasteron Wood Lath on 2* Furrinq Strips _ Cellular Gypsum Fill c Q286 0.285 Q228 QI88 0.228 0.221 0.186 0.158 0.218 0.213 O.l&O 0.153 Q220 0.213 0.180 0-153 ai5fc 0.153 0.135 0.120 2 Raster on Wood Lath on Z" Furrinq Strips -- Flaked Gypsum Fill 0.141 0.138 0.124 o.m 2 Raster on Cvqid Insulation -- (Board form) Furred 0.172 0168 0.147 0,128 0.137 0134 0-120 0.108 io ^ Raster on Cork board set in i" Cement Mortar il 0.118 0.117 0.106 0.086 Q 088 0088 0.080 0.083 Based on lH'in., the actual thickness of 2 in. furring strips. ^Figures 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. 38 Chapter 2--Heat Losses from Buildings Table 16. Coefficients of Transmission (IT) of Limestone or Sandstone Walls Note.--These coefficients are expressed in B.t.u. per hour per square foot per 1 dec. fahr. DIFFERENCE in TEMPERATURE BETWEEN THE AIR ON THE TWO SIDES AND ARB BASED ON AN OUTSIDE WIND EXPOSURE op IS miles per hour. Tbevoiuesof U in this Table are based on the followinq Internal Conductivities orCbnducfances which are expressed in B.tu. per Un perSqFt. per l`F PStone 10.00 perl Cement Mortar 6.00 per r Plaster board 6-73 per Plaster (Gypsum) 2.32 perl* Wood Lath i Raster 2.00 os applied Cork board 0.30. perl* Eiqid Insulation (Boardform) 0.33 per 1" Cellular Gypsum (B*) 0.54 perl' Flaked Gypsum, Dry (24 ) 0.48 perl" Or it V- V- Thickness of Insulation where specified "b Intenor J3 1 Construction -z 1 Plain Walls -No Interior Finish Y 8* A Thickness of Stone --X io' 12" i<o" 20* B c D E. Z4" F 0.556 0.50Z 0.457 Q385 0334 0.285 2 j Plaster on Stone 0.417 0.452 0.415 0.356 0.311 0277 3 J Plastercm Metal Lath -- Furred 0.330 0310 0.282 0.261 0.236 0.216 4 Plaster on Wood Lath - Furred 0312 0.284 0.277 0.250 0.227 0.208 \ Plaster on Raster board-Furred 5 0.314 0.285 0.278 0-251 0.228 0.208 4 Raster on Wood Lath on 2* Furrinq 6 Strips-Cellular Gypsum Fill b a >!' 0.188 0.181 0.184 o.m 0.160 0150 2 Raster on Wood Lath on 2" Furrinq 7 Strips -- Flaked Gypsum Fill a *f 0.175 0.168 0.163 0.153 0.145 0.137 8 Jr Plaster on Ciqtd Insulation (Boardform) Furred 8 10 -=r Plaster or> Cork board set in-Jr Cement Mortar 11 r 2 0.225 0.216 0,207 0.181 0.177 O.lk(o r 0.168 0.163 0.157 0148 0.140 0.132 0.141 0.138 0.134 0.127 0.121 0.115 2* 0.114 0.112 0.108 0.105 aioi 6.088 Based on 1% in., the actual thickness of 2 in. furTing strips. bThe coefficient used for ceilular gypsum. 0.59 is for 18 lb. weight--weights as low as 12 lb. may be used. 39