Document RjX18n4nRgN6pL09J66YQ8zBn

American Society of Heating and Ventilating Engineers Guide, 1928 Table 6-F. Coefficients of Transmission (U) of Various Types of Masonry Wall Construction Note.--These coefficients are expressed in B.t.u. per hour per square foot per I 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. 4" Cut StoiOe VeiJee(L ok! Bc>icic Walls The values i/U'in this Table are based on the followmq Internal Conductivities (C) which are ``Stone brick Cement Mortar Planter board Planter (Gypsum) Wood Lath 4 Planter Cork board fiber Insulation (board/orm) Cellular Gypsum (fo*) Powdered Gypsum (2fe*) 10.00 5.00 8.00 1.04 2.32 2.00 0.50 0.33. 0.59 0.52 per l* per f per 1' per l* per 1* OA applied. per l* per. f per T per 1" "3 _ Su(3j 5 1 52 56 Interior Construction Plain Walls - Vio Interior finish 57 - Plaster on brick . 58 Plaster on Metal Lath - furred Thickness of brick - X Y S' O IV 18" 24" bcd 0.181 0.146 0.188 0.160 0.280 0.134 0.180 0.155 o.ro 0.170 0.146 0.IZ4 58 i Plaster on Wood Lath - furred 0.187 0.165 0.141 0.121 60 i Plaster on % Plaster board-furred 4 Plaster on Wood Lath on T Furrihq ^ 61 Strips - Cellular Gypsum fill * 5 Plaster on Wood Lath on 2` Furrmq 6Z Strips - Powdered Gypsum fill 63 t Plaster on fiber . Insulation -- (board form) furred 64 65 4 Plaster on Cork board "set in '/x <Sb Cement Mortar "* L%` .* si .T I'A" 2" 0.183 0.151 0.143 0.152 0.114 ` 0.116 0.087 o.no 0.137 0.130 0.137 0.114 0.107 0.081 0.145 0.120 0.115 0.12i 0.102 0.087 0.083 0.164 0.105 0.101 0;105 0.081 0.087 0.076 Based on 1M >n., the actual thickness of 2 in. furring strips. 26 Chapter I--Calculating the Heat Losses from Buildings Table 6-G. Coefficients of Transmission (U) of Various Types of Masonry 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. 4" Cut StoOe VelJee.il ol) Uollow Tile Walls The valuer cf U m this Table are based on the /ollowmq Internal. Conductivities CC) which are eipressed m b.t.u. per Ur. per Sq.ft, per lF Hollow Tile 4*-afo5 8' 0.43 Stone 10.00 Cement Mortar 8.00 Plaster board 3.04 Plaster (Gypsum) 2.32 Wood Lath $ Plaster ' 2.00 Cork board 0.30 fiber Insulation (6oard/$rm) 0.33 Cellular Gypsum (l*) 0.59 Powdered Gypsum (26*) 0.52 1f-0.26 per I' per f per U per l' as applied per l' per T per T per 1* Y-Thickness cf Inhalation '.where Speci/ie'd- V =e O3 Interior. Construction 67 .Plain Wails - ^0 Interior finish 68 z Plaster on Uollow Tile xfz Cement' Mortar. Thickness of' Uollow Tile -X Y 6* 8* i V \b' a .. b c d 0,188 0.265 0188 0.146 0.272 0.Z50 0.Z84 0.141 Plaster on Metal Lath -Furred 0.190 0.178 0.140 0.115 70 t. Plaster on Wood lath - Furred 0.485 0.173 0.137 0.113 71 z Plaster on % Plaster board -furred 1 Plaster on Wood Lath on 2" Furrmq 72 Strips - Cellular Gypsum fill 73 z Plaster on Wood Lath on 2* furrmq Strips - Powdered Gypsum fill' 74 z Plaster on fiber Insulation -- 75 (board form) furred 76 Y Planter on CorL board, 77 -Cement Mortar. set in- '/>' 0.188 *. 0.148 0.141 0,178 0.142 0.135 0.140 0.TI7 0.111 0.115 0,044 0.045 lA" 0.150 0.143 V O.IZZ . 0.117 l'A" 0.114 0.110 V 0.086 0.043 0.117 0.048 0.048 0.086 0.044 .0.08Z 0.081 0.07Z *Based on 1% in., the actual thickness of 2 in. furring strips. 27 y