Document ZnBe1Zkx8bVRE86vdqpvB7p2V

m CHAPTER 9 ; 1957 Guide 'S i Heat Transmission Coefficients of Building Materials 193 Table 10. Coefficients of Transmission (C7) of Masonry Partitions" Coefficient* ore 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. Example Resistances used are given below in this toble or in Table 3 or 4*" Construction Resistance (R) 1. Inside surface (still air)................ 0.68 2. PIas. (It. wt. agg.) H in.............. 0.39 3. Cement block (cinder agg.) (4 in.)............................................ l.lt 4. Plas. (It. wt. agg.) H in.............. 0.39 ' - 5. Inside surface (still air)............ 0.68 Total resistance'....................... 3.35 U -- \/R - \/3M = . .0.31 See value 0.31 in bold face type in table below Example of Substitution Resistances used are given below in this table or in Table 3 or 4. Replace item 3 with gypsum tile (4 in.) Total resistance......................... 3.3$ - Deduct 3/ Cement block (cinder agg.) - (4 in.).................................. 1.11 Difference................................ 14Add 3. Gypsum tile (4 in.)............ 1.57 Total resistance..................3.S] U = 1/R = 113.81.............. 0.28 Surface Finish Type op Partition None Plas. (Lt. Wt. Agg.) % in. Plas. (Sand Agg.) H in. One side Two sides One side Two sides 0.39 0.78 0.11 0.22 Material RUUU UU Hollow concrete block (Cinder agg.) (3 in.).................................................................. (12 in.)................................................................ 0.86 1.11 1.78 1.89 0.45 0.40 0.32 0.31 0.38 0.35 0.29 0.27 0.33 0.31 0.26 0.25 : 0.43 ' 0.39 0.31 0.30 0.41,i 0.30../ 0.29 f/ (Lt..wt. agg.) (3 in.) .............................................................. (8,in;).................................................................. (12 in.).................... ;......................................... 1.87 0.38 1.60 0.35 8.00 0.30 8.87 . .0-28 0.330.31 0.27 ,0.25 0.30 0.27 0.24 0.23 0.36 . - 0.35!!r 0.34 0.32 . 0.29 0.28 ,.i 0.27 (Gravel agg.) (12 in.)................................................................ 1.11 1.88 0.40 0.38 0.35 0.33 0.31 0.29 0.39 0.36 0.37 0.35 Hollow clay tile (3 in.) ................................................................ (8 in.).................................................................. 0.80 1.11 1.58 1.85 0.46 0.40 0.35 0.31 0.39 0.35 0.31 0.28 0.34 0.31 0.27 0.25 0.44 0.39 0.33 . 0.30 0.42.-.4 0.37 0.32 :,1 Hollow gypsum tile (4 in.).................................................................. 1.36 1.67 0.37 0.33 0.32 0.29 0.29 0.26 H in. Solid plaster walls - - Gypsum lath 04 in-) and plas. in. each side . 1.39:-. . (Sand agg.)........................................ 0.71 1 in. each side . (Lt. wt; agg.):............................................ 1.73 (Sand aggT)................................................... 0.81 * 0i36- : 0.48 . v0.32 0.46 . -- -- --i _ --. -- Metal .lath and plas.b ., . 2 in. total thickness . (Lt. wt. agg.)........... .................. ............. ` (Sand agg.)........ .......................... 2H in. total thickness (Sand agg.).............................................. 1.88 0.36 1.60 0.46 . ' 0.38 0.58 0.34 0.55 ' . ri __ ! '-- 1 .> -- __ --. _ -- Glass and glass blocks. ........................ See Table 20 0.35 0.32 0.34 , 0.31 4 '3 O' -- - -T. 1 -- -- ' -4 . .-nit? ,, -4 -- -- T ; /Ojjjl ;.^oq .*t a See text section Calculating Overall Coefficients for basis of calculations. b Metal core and supports disregarded. Plaster troweled smooth both sides;-' '; !% ; Table 11. Coefficients of Transmission (U) of Frame Construction Ceilings and Floors* Coefficients are expressed in Btu per (hour) (square foot) (Fahrenheit degree difference between the air on the two ___ _______ sides) and are based on sttU air (no wind) conditions on both sides. Example - Resistances used are given below in this table or in Tables 8 or 4- Heated room above unheated space Construction Resistance (R) (Heat Sow down) 1. Top surface (still air) ...... 0.93 2. Linoleum or tile (avJJ).... 0.06 3. Felt..................... 0.06 4. Plywood ($i in.):......... 0.78 5. Wood aubfloor (2%a in.)-.... 0.98 6. Air spaceb (7^4 in.).............. 1.85 7. Metal lath and % in. -plas. (It. wt. agg.)................. 0.47 8. Bottom surface (still air) ... 0.98 Total resistance................. 5-48 . V = 1/12 = 1/6.43 =....... 0.18 See value 0.18 in bold face type in table below. Example of Substitution Resistances used are given below in this table or in Tables 3 or 4. Assume heated room is below un heated space so heat flow is up. Total resistance......................... 5..48 Deduct 1. Top surface (beat flow . down).:..............................0.98 3. Air space (heat flow down)............................... 1.68 8. Bottom surface (heat flow down)............................ 0.88 Resistance deducted............... 3.09 Difference....... .....................9. Si . Add 1. Top surface (heat flow up).................................... 0.61 3. Air space (heat flow up) 0.85 8. Bottom surface (heat flow up).................................... 0.61 Resistance added...................... 8.07 To Adjust V values for Construction with Added Total resistance........................ 4.41 Insulation between Framing Members, See Table 16. u = i/s = 1/4.41=. . ....... 6^3 Direction op Heat Heat Flow Upward (Winter Conditions) Heat Flow Downward (Summer Conditions) Type op Floor Wood susfloor (a&2 IN.), Felt, and- Wood subfloor (2H* in.) Felt, and- Type op Ceiling s -2': o' 13 *3203 ao.go Resistance . T3 3 II O 1.38 /.87 tj--' Uia cm Material None......... Gypsum bd. (H im). ................. VI*ggl) ^ and Vi in. plas. (It. wt. Gy^" iath (W in!) and * in! pias. (sand 0.64 0.41 0.45 0.38 0.30 0.31 0.23 0.54 0.23 0.21 0.61 0.24 0.22 laSssr-*--Metal lath &nj I* pins. (It. wt. agg.) 0.47 0.59 0.23 0.22 0.13 0.74 0.31 0. 0. 0.24 nsui bd.iath 04 in.) and Hi in. plas (sand agg.) 1.43 0.38 0.22 0.20 0.19 0.18 1.58 0.36 0.22 0. 0.19 0.18 acoustical tile 5gSteEK?.bd-inJ"' *n.) on evTwtun rp * ?*UsJIlsUg., bd- MW- _ ^th and in. plas. (sand agg. 1.6T 0.37 0.22 0.20 0.19 0.18 0.41 0.24 0.22 0.20 0.19 8.106 0.30 0.19 0.18 0.17 0.16 1.78 0. 0.21 0.19 0.18 0.17 0.40 0.62 6.29 0.26 0.24 0.22 21 0.46 0.31 0.28 0.26 0.24 0.21 0.20 0.40 0.21 0.20 0.17 0.18 0.44 0.22 0.21 0.19 0.18 0.17 0.43 0.22 0.20 0.19 0.18 0.17 0.51 0.24 0.22 0.20 0.19 0.18 0.31 18 0..17 0.16 0.15 0.15 0.30 0.18 0.17 0.16 0.15 0.14 0.30 0.18 0.17 0.16 0.15 0.14 0.33 .19 0.18 0.17 0.16 0:15 0.25 0.16 0.15 0.15 0.14 0.13 0.28 0.17 0.16 0.15 0.15 0.14 0.45 0.22 0.18 0.17 b To aHL^iwr011 Calculating Overall Coefficients for basis of calculations. * Include* ~~--V?.es B?e note l0*' above this table. Indnrltirubber, and plastic tile (H in.), ceramic tile, or terrazo (1 in.). w tarmal resistance of % in. gypsum wall board.