Document OEVXeOkXbXX0yG3pEo0EkeNwL

-T-rrrrrTT--- -" v- ,.. - vv;... -"y y American Society of Heating and Ventilating Engineers Guide, 1931 Table 16. Coefficients of Transmission (U) of 4-in. Cut Stone Veneer on 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 EXPOSURE OF 15 MILES PER HOUR. Thevaluesof U inthisTablearebased onthefblloWinq InternalConductivitiesorConductances wh ichare expressednB.Lu. per Ur: per Sq.Ft. perl"F Stone Concrete (Stone 1.2:4 mix) 10.06 perl" 8.30perl" Cement Mortar Plasterboard . Plaster (Gypsum) 8.00 per |" 3.73 per^ 2.32 perl* Wood Lath t Plaster 200 as applied Corkboard Riqid Insulation(Boardform) 0.30 perl" 0.33 perl" Cellular Gypsum (18) Flaked Gypsum, Dry (24*) 0.59 perl" 0.48 per 1' Y=Thickness of Insulation where specified L $ Interior Construction -z. Y 4>0 <0 '' a; S \ . a * . & 'TjyCement * Mortar ThicknessofConcrete --X <b" a* lO' 12" 16" A B c DE 1 Plain Walls - No Interior Finish 0.459 0.413 0.377 0.345 0796 2 \ Plaster on Concrete 3 3* 4 Plaster on Metal Lath - Purred 0.418 a 380 0.348 0.321 0.279 0.293 0.274 0257 0.242 0.217 4 \ Pi aster on Wood Lath -- Purred 0.279 0.261 0.246 0.232 0.209 5 ^ Plaster on 3-" Plaster board-Purred 0.280 0.262 0.247 0.233 0.209 a 6 ^ Rasteron Wood Lath on 2* Furrmq Strips -- Cellular Gypsum Fill b if 0.184 0.176 0.169 0.163 Q151 5 Plasteron WoodLath on 2" Furrinq 7 Strips -- Flaked GypsumFill a >' 0164 0.158 0.152 0147 0.137 B z Plasteron Rtqid Insulation -- ^Boandform) Purred 9 IQ 4 Plasteron Corkboard set in^ Cement Mortar. i i. r z 0.208 0.198 0.188 QI80 0166 r 0.158 0.152 0.147 0.142 0.133 it 0.134 0.130 0126 0122 0U6 2" 0.H0 0.107 0.104 0.102 0097 aBased 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. 52 Chapter 3--Heat Losses by Transmission Table 17. Coefficients of Transmission (U) of Concrete Walls with Stucco as Exterior Finish ,__these coefficients are expressed in B.t.u. per hour per square foot per 1 deg. fahr. ^ PENCE JN TEMpERATURE BETWEEN THE AIR ON THE TWO SIDES AND ARB BASED ON AN OUTSIDE WIND EXPOSURE OF 15 MILES PER HOUR- Tbevaluesrf Uin this Table are basedon thefbllawinq Internal Conductivities orConductances which are expressed in B.t.u.perUr. per 5q. Ft per l"F `stucco aoo perl Concrete (Stone 1 = 2:4mix) 8.30 per 1 Plasterboard 3.73 per-g Plaster (Gypsum) 2.32 perl Wood Lath 4 Raster Corkboard 2.00 as applied ^ 0.30 per l" Riqid Insulation (Boardform)0.33 perl Cellular Gypsum (18*) 0.54 perl" Flaked Gypsum, Dry (24 ) 0.48 perl Y- Tbicknessof Insulahon where specified 1 Interior Construction 2 Y 2T ** * ft * " d 3" , *o 3 b '* | /& * n 1" Stucco*--^7---- on Wire Mesh Thickness of Concrete - X Co 8* IO" 12" i>" 20" A B C DE F 1 Plain Walls - No Interior Finish 0.544 0.481 0.431 0.391 0.329 0.284 2 i Plaster on Concrete 0.486 0.437 0.395 0.361 0308 0.268 3 if Plasteron -Metal Lath -- Purred 0.326 0.302 0.282 0.264 0.234 0.210 4 j Raster on Wood Lath-Furred 0.308 0.287 0.268 0.252 0125 0.203 5 \ Plasteron \ Plasterboard-Purred 0.310 0.288 0.270 0.253 0.226 Q204 6 -j Plasteron Wood Lath on 2." Furrinq Strips-Cellulor Gypsum Fill b a r 0.1% 0.188 0.179 0.172 0.159 0.148 i Plasteron WoodLathon 2 Furrinq 7 Strips - FlakedGypsum pill a if 0.173 0.167 0.161 0.154 0.144 0-135 8 "5 Raster on Riqid Insulation (Board form) Furred 9 10 i Raster on Corkboard bet in-E II Cement Mortar r z 0.223 0112 0102 0.192 0.176 0-163 r 0-167 0.160 0.154 0.149 0.139 0.130 He D.I4I 0.136 a 132 0.127 0.120 0.114 2" 0.114 0.1 II 0.108 0.105 0.100 0096 "Based on 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 i2 lb. may be used. 53