Document jy6xBQxpVyK9Lj6ZD5bd6QEpZ

American Society of Heating and Ventilating Engineers Guide, 1932 Table 26. Coefficients of Transmission (/) of Frame Construction Floors and Ceilings Note.--These coefficients are expressed in Btu per hour per square foot per 1 deg fahr DIFFERENCE IN TEMPERATURE BETWEEN Ti(E AIR ON THE TWO SIDES AND ARE BASED ON STILL-AIR (NO WIND) CONDITIONS ON BOTH SIDES. The values of U in this Table are basedon thefollowinq Internal Conductivities orConductances which are expressed in R.t.u. per Hr. per Sq.Ft.per t*F Wood (Yellow Pine or Fir) 1.00 per I" Wood(Maple) Plaster (Gypsum) Plaster board 1.20 per 1" 2.32 per 1' 3.73 per it" Wood Catb 4 Plaster 2.00 as applied Cork, board 12.laid. Insulation (boardform) Cellular Gypsum (18*) Flaked Gypsum,Dry (16*) 0 30 per 1" 0.33 per 1" 0.51 per 1* 0.34 per F ' Flexible Insulation 0.27 per l* ` Typical Construction Floorinq- Ceilimj Ir' w0) Ceiling 5 3 z Insulation between Joists Type of Floorinq No Floorinq ' I** Yellow Plneb Floorinq Y Yellow fine * floorinq Maple drOat ' ;loormq on 1" on Joists kiqtd Insulation Yellow Fine (board form) Sob-floonnq on Joists on Joists A B cD i Mo Ceilinq None 0.440 0.264 0.338 i Metai Lath 4 Planter (J) 3 Wood Lath 4 Plaster (-^ ) None None 0.551 0.502 0.238 0.272 0.200 0.182 0.238 0.230 4 i Plader board {Plaster (?) None 5 A" Ciaid Insulation .(Board form) None 4 Plaster (*) 6 Wood Lath i Plaster (4") ^"Flexible Q Insulation 7 Wood Lath 4 Plaster (V) ~2(qid Insulator) (board form) a 8 Wood Lath 4 Plaster (V) Cellulor Gypsum Fill (V) <*-c 9 Wood Lath 4 Plaster (- ) flaked. Gypsum fill (V) c 0.506 0.310 0.210 0.224, 0.186 0.127 0.273 0.204 0.155 0.163 0.141 0.(05 0.183 0.156 0.126 0.131 0.117 0.080 0.230 0.178 0.140 0.148 0.128 0.088 10 lA Cork, board 4- Plaster (V) 11 Z'VCorkboard 4 Plaster (-f") None None 0.143 0.1(3 0.118 0.100 0.101 0.087 O.UO 0.083 The value of V is the same if insulation is applied to underside of joists and latb and plaster ceiling separated by furring strips. bBased on actual thickness of approximately % in. for 1 in. yellow pine flooring. cThickness of fill assumed 2 in. 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 Transfer Through Materials and Constructions Table 27. Coefficients of Transmission (27) of Concrete Construction Floors and Ceilings .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 STILL-AIR (NO WWD) CONDITIONS ON BOTH SIDES. sull-aik wiu; T ie values of U in-thisTable are basedonthefallowirw 1 eternal Conductivities or Conductances which are 7 expmessed in B.tu. per Hr per Sq.Ft. per l*F Tile orTerraco 10.00 perl" Concrete (Stone 1:2:4 mix) 8.30 per 1" Cement Mortar 8.00 perl' Wood (Yellow Pine or Fir) T.00 perl" Wood (Maple) |.lo perl" Plasterboard . 3.73 per j" Plaster (Gypsum) 1.7a. per r Cork, board 030 perl" Riqid Insulation (Boardform) 0.33 per 1' Typical Construction lype of Ceilinq L 1 Es 1 No Ceilinq 2 _3_ 4 b_ 4 Plaster applled. (o directly to undjei-- 7 -Side of Concrete 8 9 Suspended or IQ furred Metal 11 Ceilinq 12 13 Suspended or _I4 15 of3* Plaster board 4 Plaster _w Suspended or 18 Furred Ceilinq of 19 % Ptqid Insulation (Board form) 4 20 Plaster 21 Y Plaster on l^' 22 Lork board set in 23 on Concrete 24 ji \ Plaster on 2" Zo> Lore board set in' 27 28 on Concrete xi _noVc*/ Ho Floorinq A (Concrete bore) u A' 4" 0.S08 <b" 0.452 S'1 0.408 to- 0-372 4" 0.457 0-411 8' 0.374 lO 0-344 4" 0.312, tr 0.211 8" 0.272 10" 0.255 4" 0.217 6" 0.277 b 0.260 10 0.245 4" 0.217 6" 0.206 8' 0.197 10 0.187 4 0.138 <b" 0.133 8' 0.121 10 0.125 4' 0.112 6" 0.101 8' 0.106 10 0.104 Type of Flooring 1`Yellow PineFlpor- fcMaple orOak Floount fTerraijoor -tnqonWoodSleeper: on TYellow Pine Sub- Tile Floormq an embedded in ftoonnq on WoodSleepers Concrete Concrete embedded in Concrete B 0.364 0.334 0.310 0.288 0.337 0.311 0.210 0. 271 0.251 0.237 0-224 0.212 0.241 0.228 0.216 0.206 0.185 0.178 0.170 0.163 0.124 0.121 0.117 0.114 0.103 0.101 0.018 0.016- c 0.212 0.273 0.256 0.241 0.275 0.258 0.243 O. 230 0.215 0.204 0.195 0.186 0.208 0.198 0.189 0.181 0.165 0.159 0.153 0.147 0.115 0.112 0.109 0.106 0.097 0.094 0.092 0.090 D 0.483 0.433 0.392 0.358 0.437 0.395 0.361 0. 332 0.303.' 0. 282 0.264 0.2490.289 a 270 0.254 0.239 0.212 0.202 0. 193 . 0. 184 0.136 0.132 . 0.128 0.124 .O. Ill 0.108 0.105 0.103 "The figures in column "A" are sufficiently accurate for concrete floors covered with carpet or linoleum. bThe figures in column 14 B" are sufficiently accurate for % in* maple or oak flooring applied directly over the concrete on wood sleepers. 69