Document 937QggZr7kZXXoermRnD1BV6q

lii-V U ' 190 CHAPTER 9 1956 Guide Table 7. Coefficients of Transmission (U) of Frame Walls* These coefficients are expressed in Btu per (hour) (square foot) {Fahrenheit degree difference in temperature between the air on the two sides), and are based on an outside wind velocity of 15 mph. No Insulation Between Studs" (See Table 6) Heat Transmission Coefficients of Building Materials 191 Table 8. Coefficients of Transmission (U) of Masonry Walls* Coefficients are expressed in Btu per (tour) (ajuare foot) (Fahrenheit degree difference in temperature between the air on the two sides), and are based on an outside wind velocity of IS mph. INTERIOR FINISH (Plot Insolation Whsbn Indicated) TYPE OF MASONRY [ (B tu 2 S ^ S to U rto | S o u * Bk . sTM *. f P o w CoHcium* f BouT u : r m Gravel Aggregate 8 12 046 0.49 042 0.46 044 042 044 041 042 040 0.24 0.22 043 042 0.17 0.16 ^o do 82 83 Cinder Aggregate 8 12 0.41 048 049 046 048 046 048 046 047 045 0.21 040 040 0.19 0.15 0.15 0.13 1 84 0.13 | 65 (See text p. 186.) light Weight Aggregate* ~8_| 036 0.34 I 0.26 I 0.25 034 | (U9 F 0.19 I 0.15 \12 | 034 1 033 I 0,25 I 0-24 1 0.24 [ 0.19 ] 0 18 0.14 * See Table 5 Note a. 0.13 I 88 0.13 | 87 a Based on 4 in. bard brick and remainder common brick. . b The 8 in. and 10 in. tile figures are based on two cells in the direction of heat flow. The 12 in. ^eis based n three cells in the direction of heat flow. The 16 in. tile consists of one 10 in. and one 6 in. tile, each bavmg two cells in the direction of heat flow. c Limestone or sandstone. . 6 These figures may be used with sufficient accuracy for concrete walls with stucco extenor finish. * Expanded slag, burned clay or pumice. 1 Thickness of plaster assumed } in. 0 Thickness of plaster assumed $ in. Based on 2 in. furring strips; one air space.