Document JraOn41qgg539xQNVE8kmyYgB

American Society of Heating and Ventilating Engineers Guide, 1928 Table 7-D. Coefficients of Transmission (U) of Various Types of Frame Wall Construction 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. baicic VekJeeg. Walls The values of 0 in this Table arc /ollowmq Internal Conductivity expressed in b.t.u. per Ur. per brick Cement Mortar Planter (Gypsurn) Wood. Lath if Planter Planter board. Cork board Fiber Insulation (txyxrd form) Felt or Quilt Insulation (So/T) Cellular Gypsum 06*) Powdered Gyp*um (26 ) __ -S 15 T'fP' ofSheatWinq 144 Wood * 145 Wood. 14 (. Wood. * 147. Wood * 148 Wood * 149 Wood * 150 Wood * Yz fiber Insulation 151 (board farm) f fiber Insulation : I5Z (board form) . Yi fiber Insulation 153 (board form) 154 % . Plaster board Insulation between 5tu.ddmq Uone Yz Felt or Quilt * Insulation W Fiber ` Insulation * (board form) Cellular Gypsum Fill Powdered Gypsum fill * * Plater base Wood. Lath Wood Lath Wood Lath Wood Lath Wood Lath Done 1 yfz Cork board. Lione Vione klone Yi. fiber Insulation t (board form) , lione 2* Cork, board. Yi Fiber Insulation (board form) Yz Fiber Insulation (board form) Yi Fiber Insulation (board form) Plaster board Coq^icient TTrans`Tmission U' . O.ZIfc 0. IZ.5 . 0:131 0.108 0.098 0.107 0.091 0.15Z 0.123 0.104 o.ia. Based on in., the actual thickness of 1 in. or % in. sheathing. fBuilding paper neglected in computations in accordance with accepted practice. tCan also be applied to inside of studding with plaster base separated by furring strips. ^Thickness of fill assumed 3in., based on 2 in. by 4 in. studding. 34 .Chapter I--Calculating the Heat Losses from Buildings Table 8 A and B. Coefficients of Transmission ((/) of Various Types of Interior Walls and Partitions 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 Still air (no wind) conditions on both sides. PlASTEtZED fGAUE PAB.TITIOUS The values cf U in this Table are On one side of Studdinq based on the/Allowing Internal oaly Conductivities (C) which are e<pressed in bt.u. per Ur. per Sq.ft, per 1 f y Plaster (Cypsum) 2.5Z per l. Plaster board 5-04 perl' Wood Lath 4 Pla*t?r 2.00 as appi'd. |7r*l"2: fiber In* (baud0.35 per l* felt orQuilt Ins.(5c/t) 027 per r Corkboard 0-50 per l Cellular Gypsum (l6*) 35 per V n4"\ fbwdere4CYPum(.Z4*) 0-51 perl' bo-* 7 , Wall Mo. Plaster base 155 Metal Lath. f a 0.551 On both sides of Studdmq stuaa "1-r Insulationbetween ^tuddmq tn^uW Gypsum -fill between Studdinq Cfp am rm ^ b 0.X15 11m^A*. J li fiber yi felt Cellular bwdered Insulationi or Guilt Gypsum Gypsum (board Insulation Till * fill * /arm) (W) C d .e / aise 0.14} 0.124 0.113 156 Wood Lath * 157 3/ft' Plaster board.* 15S Yi fiber Insulation (boardfornj 155 l' fiber Tnsulation (boardfornf 0.502 0.546 0-311 0.211 0.2 51 O.Z73 0.155 a 106 0.14} 0.136 0.119 0.108 a 106 0.08C 160 lltf Cork board* 0.149 0.074 . . u=i I' Cork board* O.II4 0.060 b Plastehed UasoiJuy PaG-TITIOUS The values cf U in this Table are based on the /ollowmq Internal Conductivities (C) which are expressed in b.t.u. per Ur. per Sq.ft, per l*f Hollow Clay Tile (4*) 0.65 per 4' ferict 5.00 per 1` Uollow (ypsum Ti|e (4*) t.00 per l* Plain Walls (Mo Plaster) 1H Walls Mastered Walls Plastered One Side 6oth Sides yi Cypsaa Piaster^ KGfP* PWster s 0 1 Wall Uo. Wall Construction 162. 4 Uollow Clay Tile 163 4` brick 164 4' Uollow Gypsum Tile a 0.33 0.44 0.1& b 031 0.40 0.175 c an o-V o.n . The thickness of the Gypsum Fill is approximately 3% in., as this is the approximate 4 in. dimension . of 2 in. by 4 in. studding. tMetal lath and plaster assumed Jin. thick. {Piaster assumed >4 in. thick. 35