Document ymoxxOd89LboYk42V6j02pXQV

128 , CHAPTER 6 1948 Guide Table 8.. Coefficients of Transmission (C/) of Brick and Stone Veneer' Masonry Walls Coefficients are expressed in Blu per {hour) (square fool) {Fahrenheit degree difference in temperature between the air on the two sides), and are based on an outside wind velocity of. 16 mph. TYPICAL CONSTRUCTION facing BACKING INTERIOR FINISH (Pure Insulation Whkbb Indicated) E X3ao a I 4 31 M 13 fcs * 1 i E 9 5 11 tJ 13 S 1i j a" s _d o aa S _o s _d a 3* K| d3 1| ta J * -TB Is la 1* ll tots ja Oto CQ*t *h m * w-o M's 3 .3 3 2 s| g! Si a* ii >. 3 O to .531 <9 d 3 3 S<5 .5*8 <9 ft .5 to .sS la A2S.3I 003 H* 3 AB cDE FGH 1 6 In. Hollow Tils* 8in. Hollow Tile*.... ....; _ 035 034 035 035 0.24 0.19 0.18 0.14 0.13 88 034 032 035 034 033 0.19 0.18 0.14 . ..o3oft. 4 In. Brick Veneer* 039 0.35 035 033 034 034 0.33 033 031 033 033 <U7 015 91 . 8 in. Concrete Blocks* .8 in. Concrete Blocks* - 0.44 0.4l 039 039 038 031 031 (Cioder Aggregate),___________ 8 In. Concrete Blocks* 034 033 035 034 034 0.19 0.18 0.14 013 93 (light Weight Aggregate^_____ 031 039 033 033 032 0.18 0.17 0.14 0.12 94 | 1 6ln.Ho0owTlle* . Bin. Hollow THe*............. 4 In. Cut Stone Veneer* A In d o3 lefcio o 037 036 036 0.19 0.19 0.15 036 034 035 0.19 0.19 0.14 0.63 038 037 033 035 034 033 034 033 017 0.15 8 in. Concrete Blocks* (Gravel Aggregate).......... 8 In. Concrete Bfodcs* .......... 0.47 0.44 030 030 039 032 031 0.16 014 99 8 In. Concrete Blocks* 036 034 035 035 0.24 0.19 0.19 0.15 0.13 00 (light Weight AggregateH^^. 032 030 033 033 032 0.18 0.17 D.14 0.12 1 01 -,-Hu .iMunna Dasea on in. cement mortar between backing and facing e concrete backing which is assumed to be poured in place. The hollow tile figures are based on two air cells in the direction of heat flow. Hollow concrete blocks. `Expanded slag, burned day or pumice. Thickness of plaster assumed X in* /Thickness of plaster assumed M in. Based on 2 in. furring strips; one air space. Siv^v'- Heat Transmission Coefficients of Building Materials________________________ 129 ( )Table 9. Coefficients of Transmission U of Frame Partitions or Interior Walls* ^\ . 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 still air (no wind) conditions on both sides. . INTERIOR FINISH IriterioM . SINGLE PARTITION NS (Finish on one fissi1 ride only of studs) . DOUBLE PARTITION (Finish ou both rides of studs) NO INSULATION BBTWJUtN STUDS 1 in. Blanket'* BETWEEN STUDS. . Onb aib space. Gypsum Lath (M la*) Plastered*~---------- --------- Plywood (X in*) Plain or Decorated....-------- -------Tiwnjlftiang Board (H in.) Plain or Decorated--------Insulating Board Lath (H in.) Plastered*..... .......... A 0.69 0.67 0.62 0.61 am oooo B 039 037 ... 034 . 034 033 0.19 0.18 0.12 . poop C 0.16 0.16 0.15 0.15 . t 9 1 Z aos 2 1 .2 <'3 4 5 6 7 8 Coefficients not weighted; effect of studding neglected. Piaster assumed X in. thick. .............. Plaster assumed H in-thick. r `For partitions with other insulations between studs refer to Table 6, using values in Column B of above table in left hand column of Table 6. Example: What is the coefficient of transmission {U) of a partition consisting of gypsum lath, and plaster on both sides of studs with 2 in. blanket between studs? Solutions According to above table, this partition with no insulation between studs (No.4B) has a coefficient of 0.34. Referring to Table 6, it will be found that a wall having a coefficient of 0.34 with no insulation between studs, will have a coefficient of 0.10 with 2 in. of blanket. Insulation between studs (No. 56B).