Document JvyybQa4KKm95XYz1Mm3RO6QX

190 CHAPTER 9 1952 Guide Heat Transmission Coefficients of Building Materials 191 Table 10. Coefficients of Transmission (IT) of Frame Partitions or Interior Walls" Coefficient* are ezprreeeed in Btu per (hour} (square foot) (Fahrenheit degree difference \n temperature between " the air on the two side*), and are based on etiU air (no wind) condition* on both eties. INTERIOR FINISH finish SINGLE PARTITION (Finish on one side only of studs) DOUBLE PARTITION (Finish on both skies of studs) No EKBUlATZOlf BBTWBHN STUDS lm.BunxsH BBTWZSn 8TUD8. On ASB SPACB. Metal Lath and Raster*_______..... Gypsum Board (M in.) Decorated.. Wood Lath and Plaster-- Gypeum Lath in.) Plastered*-- Plywood (H in.) Plain or Decorated.Insulating Board (M in.) Plain or Dec. . Insulating Board Lath (J4 In.) Plastered*.. Insulating Board Lath (1 in.) Plastered* A' 0.69 0.67 0.62 aei 0^9 0^6 - ns$ B 039 037 034 034 033 0J9 0J8 033 e . 036 0J6 006 006 006 0O1 001 04)82 (See text p. 182.). ; .' .' Coefficients not weighted; effect of studding neglected. * Plaster assumed 2 in. thick. c Plaster assumed I in. thick. d For partitions with other insulations between studs refer to Table 7, using values in Column B of above table, in left-hand column of Table 7. Example: What is the coefficient of transmission ( U) of a partition consisting of gypsum lath and plaster on both sides of studs with 2 m. blanket between studs? Solution: According to above table, this partition with no insulation between studs (No. 4B) has a coefficient of 0.34. Referring to Table 7, 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). 11.Table Coefficients of Transmission (U) of Masonry Partitions Coefficients are expressed in Btu per (hotir) (square foot)(Fakrenheitd^ree difference in temperature between * the air on the two aides), and are based on stiu atr (no wind) conditions on hot* aides. (See text p. 182.) 2 in. solid plaster partition, U = 0.63. * Exoanded slag, burned clay or pumice. . exanaji iii 3i Z z a9 i fc e O *5 & 5 S H ` 55" 1 O5 5s 6I ag .o ^3 2Z Ig "5 3s & 5 1 11 hu H I o_ Oi .2 fe a 9| A 4-f 33 i- 1) Si I'sa w 8$ 8^2 RoofceSoS oooo snNsHssm- oooo ssis .9 X a-S3- 5?.. . .2 S -2 A :-8 A-OOO oooo oooor--r> oooc QMNMMOO)- ooo CINNC* OOOO . neeg oooo a<osono> oooc OOOO S?22S OOOO JH3 ^ co 3 -UR .= Si? &3eo *3 : ill ..........*3 5g-5 sgi *i *. .. 8-2 2 2-S' . Sq s g rsg-ii ag slsS S3 S2 'rj*x 8^| Ji a JS^LS.9 5a Ss 'SSf-3 ibl oSo S\ s*7 iOs -- %cic-o. 'aa fJS-4 1 < -n - fl S g ** . g =-1 J O a) 7 o O o " "S Si'S 1 0 a 3 CT3 ja - s ; 1-JSl j g CO 3 o"r * * ! - jH M- oS-*a?sJh. S b A -s Sa si s & | - -a S`-3 *3 ^ a 11 = a's *!| I i 1 | ffi| D * -- O C11 * " S-S Ss =-S "S B= 8= J.J 3 CU t-x S U jhte-