Document nN3beK3n47bEdp33xEzON9BDz

American Society of Heatinp and Ventilating Engineers Guide, 1929 Table 8-B. Coefficients of Transmission (V) 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. Wood Swiugle The values of U in this Table ore based, on the fo\fowinq Internal Conductivities (C) which are expressed in b.t.u. per Ur. per Sq.ft, per PF Wood (Vellow Pine or Fir) 1.00 per l* Plaster (Cvpsum) l.VL per l* Wood lath 4 Plaster Plaster board. LOO as applied 3.04 per 1* Cork board. 0.30 perl* fiber Insulation (Board form) 0/33 perl" Felt or Quilt Insulation Cx/t) 0.17 per f Cellular Gypsum (id") 0.51 per t" FlatedGypsurn, Dry (26*) -52 pef l Walls** Typica\ Con- truction ^heatVunq --"7 ' flood, ^hmqles^ *4* Stu.d) -p / .'. lVer_> ` - V S3 3= Type of Sheo-thmq IZ2 ` Wood * 121 Wood * IZ4 Wood. * IZ5 Wood * 1Z6 Wood * Insulation between Studdmq Uone Vfc' Felt or Quilt f Insulation ^ Vt Fiber Insulation^ (board form) Cellular Cypsum fill ^ flaWedL Cypsum Fill5 Plaster ba.se Wood Lath Wood-Lath Wood Lath. Wood Lath Wood Lath ' Coefficient Transmission U 0.1Z7 s 0.129 0.135 0.110 0.101 127 Wood * Uone lift* Cork board 0.110 IZ8 Wood * Uone 2" Cork board 0.(593 iza'-A Wood * Vi Fiber Insulation T 129 (board form) 1* $130 fiber Insulation (board /arm) 131 Vft* fiber Insulation t (board /orm) m ^Plaster board None '/l fiber Insulation (board jftprnr)- 0.178 Uone Yl Fiber Insulation (board /orm) .. 0.127 Uone. Yl Fiber Insulation t (board farad Vl fiber Insulation (board form) Yi Fiber Insulation (boord form) 0.107 0.092 Uone y& `. Plaster board 0.197 Based on % in., the actual thickness of 1 in. or in. sheathing. Building paper neglected in computations in accordance with accepted practice. tCan also be applied on inside of studding with plaster base separated by furring strips, tFurring strips between wood shingles and sheathing. ^[Thickness of fill assumed 3fi in., based on 2 in. by 4 in. studding, Note.--The coefficient used for plasterboard is 3.04 per inch thickness--recent data indicate values as low as 1.30 for this material. Note.--Plasterboard sheathing is now made in half inch thickness* Note.--The coefficient used for cellular gypsum, 0.59 is for 18 lb. weight--weights as low as 12 lb. may be used. 34 Chapter I--Heat Losses from Buildings thtf 8-C Coefficients of Transmission (17) of Various Types of l able o- . Frame Wall Construction -Th.se coefficients are expressed In B.t.u. per hour po-squarefoot Stucco walls f The values of U in th Table are baeed on the /allow,na Internal Conduct,v.t, (C) which arc oreed m 6.t.u. per Ur. per Sq.ft, per l f Stucco Wood (fellow Pine or fir) 8. P*r l. 1.00 per l Plaoter CGypeum) Wood Lath < Planter Z-M f*r 1 1.00 ao applied Plotter board Cork boord . fiber Insulation (Board/orm) Felt or Qu,U. Insulation (Sq/t) Cellular Clpnum Oh*) 3 04 o io 0.33 O '7 0.51 per 1 Pcr [. per l per l per F Flaked Gypsum, Dry(ZO 0.5Z per l Typical Constru :tion ft7Sheathinq--* f 3tu.cco_, ifess-il*4 st W _DJ =6 as 32 133 Type of Shcathmq Wood * 134 Wood * 135 Wood * r 136 Wood *" Insulation between Studdmq Plaster base Uone Wood Lath VC Felt or Guilt t insulation Yi Fiber Insulation % (board form) 11 Cellular Gypsum fill Wood Lath Wood Lath Wood Lath Coefficient Tranosmf ission U 0.257 0.158 0.145 0.117 137 Wood * 138 Wood' * Flaked Gypsum fill Done Wood Lath 1%* Cork board 0.107 0.116 139 Wood * Itfl-A Wood * Yi Fiber Insulation 140 (board form) 1* Fiber Insulation 141 (board form) Yi Fiber Insulation 142 (.board form) 143 . Ye Plaster board Uone None. Uone / Uone Yl Fiber Insulation (board form) Uone Z" Cork board Yi Fiber Insulation (&Op.rd form') Vz Fiber Insulation (board /orm) Yi Fiber Insulation (board form) xlC Fiber Insulation Cboard form) Vo Plaster board 0.097 0.194 0.171 0.136 0.113 0.326 Based on *34 in., the actual thickness of 1 in. or 34 in. sheathing. Thickness of fill assumed 3% in., based on 2 in. by 4 in. studding. fBuilding paper neglected in computations in accordance with accepted practice. {Can also be applied on inside of studding with plaster base separated by furring strips. / Note.--The coefficient used for plasterboard is 3.04 per inch thickness--recent data indicate values as low as 1.30 for this maahteeraiathl.ine is now made in half inch thickness. may be used. 35