Document a4v3mnoozbN8wXGgnQy3g1qkM

American Society, of Heating and Ventilating Engineers Guide, 1928 Table 7-B. 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.' Wood `SmucLt The values of U in this Table are based on the /bffowmq Internal Conductivities (C) which are Sq.ft. per IT Wood (Yellow Pine or fir) Plaster (Gypsum) LOO per f 2.52 per l* Wood Lath $ Plaster Plaster &oard 2.00 as applied 3.04 per li Cork board 0.30 per f Tiber Insulation (board/brm) 0.53 per f Felt or Quilt Insulation (5</t) 0.27 per I' Cellular Cypsum 18*) 0.54 per f fbwderecL Cypsum (Z4#) 0.5Z per 1 Walls Typica\ Construction =51 32 122 Type of Skieokhmq Wood * Wood Wood * Wood Wood ** Insulation between Studdmq Done * Yl Felt.orQu.lt T Insulation Vi fiber lnsulation*t (board form.) Cellular Cypsum Till ' Powdered Cypsum fill' Plaster 6a.se 'Wood Lath Wood Loth Wood Lath Wood Lath Wood Lath Coe/^ictent TTransmission 0.128 O.MH 0.135 0.110 0.101 Wood k)oPie life * Cortboard 0.U0 Wood Vione 2" Cork board to. fiber Insulation t (board form) no l fiber Insulation t (board form) `/r Tiber Insulation t (board /orm)' Done to! 'fiber Insulation t (board form) to--Tiber Insulation (board /brm) to! Tiber Insulation (board form) Yi fiber Insulation (board form) % Plaster board * klone Vs Plaster board 0.0S2 0.127 0.107 0.082 0.187 Based on H in., the actual thickness of 1 in. or % in. sheathing. Building paper neglected in computations in accordance with accepted practice. fCan also be applied on inside of studding with plaster base separated by furring strips. {Furring strips between wood shingles and sheathing. ^Thickness of fill assumed in., based on 2 in. by 4 in. studding. 32 Chapter I--Calculating the Heat Losses from Buildings Table 7-C. Coefficients of Transmission (U) of Various Types of Frame Wall Construction jvote.--These coefficients are expressed in B.Lu. 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. Stucco Walls t The values of U in this Table are based on the /ollowmq Internal Conductivities (C) which are evpressed in &.t.u. per Ur. per Sq.ft per ff Stucco Wood (Vellow Pine or Fir) 8.00 per C 1.00 per l* Plaster (Cypsum) Wood Lath t Plaster Z.3Z per I* Z.00 as applied Plaster board. Cork board 3.04 per F 0.30 per l Fiber Insulation (board form) O.H per l* Felt or Quilt Insulation (Sc/t) 0.27 per 1` Cellular Cypsum (IB*) Powdered Gypsum (70*) 0.53 per 1' 0.52 per l Ty pi cal Construction =o s6 3= 133 Type of Sheathinq Wood * 134. Wood. * 135 Wood 1 13b Wood * 137 Wood 138 Wood Insulation between ^tuddinq Plaster base Done Vi felt or Quilt T Insulation Yi Fiber Insulation t (board form) Cellular Cypsum Fi(l Wood Lath Wood Lath Wood Lath Wood Lath Powdered Gypsum fill Wood Lath lto Cork board CoQ^icient f . Transmission U 0.Z57 0.138 0.145 0.H7 0.107 0.116 138 Wood * 140 W fiber Insulation (board form) 141 l* fiber Insulation (board, form) Yi fiber Insulation 142 (board form) 143 Vs Plaster board Done 2 Cork board Done to fiber Insulation (board /brm) Done to. fiber Insulation (Aboard form). to! fiber Insulationt */t" fiber Insulation (board form) . (board form) Done Ve Plaster board 0.087 0.171 0.1 36 O.U 3. 0.326 Based on ft in., the actual thickness of 1 in. or % in. sheathing. {Building paper neglected in computations in accordance with accepted practice. {Can also be applied on inside of studding with plaster base separated by furring strips. Thickness of fill assumed 3% in:, based on 2 in. by 4 in. studding. 33