Document a167bZeND1R5J7V4zMpO9zGyY

FI' ,jj $ f,; 188 - CHAPTERS ' 1958rGuide Heat : Transmission Coefficients lof^Building.'Materials 189 i.];; Table 7. Coefficients of Transmission (7) of Masonry Walls* P} Table 7.. Coefficients ofTransmission (U) of Masonby Walls* (Concluded) Coefficients are expressed in Btu per (hour) {square foot) (Fahrenheit degree difference in temperature hetwetrTp^ - - the air on the two sides), and are based on an outside wind velocity of 15 mph. jCT- Interior Finish o n e | , 'N j; Example Resistances used are given below in this table or in Table S or 4. Construction Resistance (iJ) 1.' Outside surface (15 mph wind) 0.17 2. Face brick (4 in.),(av. R.)___ 0.59 3. Cement mortar Yi in................. 0.10 4. Concrete block (cinder agg.) Example of Substitution A* Resistances used are given below in. this table or in Table 8 or 4. Replace items 6 and 7 with wood i'* panels (H in.) and vapor barrier applied over furring strips Total resistance............................ 8.88 7*' Exterior Facing Backing - Metal Lath Plas. AND % Hin.on IN. Wall Plas. on Fur ring .. Gypsum Lath (% IN.) AND H in. Plas. on Furring Iksul. Bd. Lath (H in.) 0 z D u and h a in. Plas. on Fubt ring ' 5= 12 345670 (4 in.). l.il 5. Air space5............... 0.97 6. Gypsum lath (H in.)7................ 0.89 7. PUs. (sand agg.) \h in.......... i. 0.09 8. Inside surface (stillair)...........0.68 Deduct 6. Gypsum lath (% in.).. 7. Plas. (Sand agg.) in. Resistance deducted.. 0.8i 0.09 J*o te a ts CdQ<S . -O M flM i . w w Ch C*O< s*1 O Z '3 'V' i K fl w OT e* 0 55 * a u a aw m 00 T Total resistance............. ...... 8.88 Difference............................. 8.48 Resistance 0.11 0.89 0. IS 0.41 6.88 0.41 0:64 1-43 1.68 0.40 si; U = l/R = 1/3.83 =............ 0.26 Add o.oeVI ' See value 0.26 in bold face type in table 6. Vapor barrier........................... ,L ut-r below. 7. Wood panel (^4 in.)............... o.w%* Material Av. R Material R UVVVUU UUVU Resistance added... .1.00 A* Total resistance =* V - l/R = 1/4.48 4-48 :v 0.23 --:1 V Concrete block (Cinder agg.) (4 m.) ` 1.11 0.36 0.35 0.32 0.26 0.24 0.25 0.24 0.23 0.19 0:19 0.24 To Adjust U Values fob Constkuction with Added Insulation between Fur- -ft (8 in.} (12 in.) 1.78 0.29 0.20 0.26 0.22 0.21 0.21 0.21 0.20 0.17 0.17 0.21 1.89 0.2U 0.27 0.25 0.21 0.20 0.21 0.20 0.19 0.17 0.17 0.20 3' ring Strips, See Table 16. ; 7!; . (Lt. wt. agg.). , (4 in.) 1M 0.32 0.30 0.28 0.23 0.22 0.22 0.22 0.21 0.18 0.18 0.22 (8 in.) 8.0C 0.27 0.26 0.25 0.21 0.2G 0.20 0.20 0.19 0.16 0.16 0.20 Interior Finish (12 in.) (Sand agg.) * 8.87 0.25 0.25 0.23 0.20 0.19 0.16 0.19 0.18 0.16 0.16 0.19 Exterior Facing Backing Metal Lath Gypsum Lath (ffc a z %1N. ON Wall in. Plas. on Fur ring IN.) AND in. Plas. on Furring o Insul. - Bd: Lath a 1.-"7 (Hin.) -AND H in.Plab. on Fur Ss ft;-: ring ' (sand agg.) 8 in. 0.80 0.78 . (4 in.) (8 in.) (12 in.) 0.64 Hollow clay Tile (4 in.) (8 in.) (12 in.) Concrete 0.71 0.42 0.40 0.36 0.29 0.26 0.27 0.27 0.25 0.21 0.21 0.27 1.11 0.36 0.35 0.32 0.26 0.24 0.25 0.24 0.23 0.19 0.19 0.24 1.88 0.34 0.33 0.30 0.25 0.23 0.24 0.23 0.22 0.19 0.18 0.23 1.11 0.36 0.35 0.32 0.26 0.24 0.25 0.24 0.23 0.19 0.19 0.24 1.85 0.28 0.28 0.26 0.22 0.20 0.21 0.20 0.19 0.17 0.17 0.20 8.50 0.24 0.23 0.22 0.19 0.18 0.18 0.18 0.17 0.15 0.15 0.18 41 _ *3 a cS TJ M 3_ P- T3 -i< 5s- d - S -a 1 55 - w -3' \ ------ ---------- (Sand agg.) '(4 in.) (6 in.) (8 in.) 0.88 0.50 0.48 0.42 0.32 0.29 0.30 0.30 0.28 0.23 0.22 0.30 0.48 0.47 0.44 0.39 0.31 0.28 0.29 0.28 0.27 0.22 0.22 0.28 0.64 0.43 0.41 0.37 0.29 0.27 0.28 0.27 0.26 0.21 0.21 0.27 b ^ec te*! Bection Calculating Overall Coefficients for basis of calculations. Resistance 0.11 0.89 0.13 O.47 0.88 o-t1 0.64 1.48 1.58 0.40); To adjust U values see note just above this table. Material ' Av. R Material ` M R U u U U U iv V U U U Concrete block "'W- (Cinder agg.) (4 m.): (8 in.) (12 in.) 4 in. Stone (sand agg;) 4 int *6 in. : - O.44 ; 0.89 0.88 0.48 ,: ; (Lt. wt. agg.) (4 in.) (8 in.) (12 in.) (Sand agg.) (4 in.) (8 in.);. .(12 in.) Hollow clay tile (4 m.) (8 in.) - : (12 in.); - ,, - j-.r Concrete . : . (Sand agg.) (4 in.) . (8 in.) - ! (8 in.) 1.11 0.41 0.39 0135 0.28 0.26 0.27 0.26 0.25 0.21 o.m'Jf 0-20 1.78 0.33 0.32 1) 20 0.24 0.22 0.23 0.23 0.21 0.18 0.18 0.23 Jit; 1.89 0.31 0.30 0.28 0.23 0.21 0.22 0.22 0.21 0.18 0.17 o'.22,m! .zMht 1.50 0.35 0.34 0.31 0.25 0.23 n 24 0.24 0.22 0:19 0:19 8.00 0.30 0.20 0.27 0.23 0.21 0.22 0.21 0.20 0.17 0.17 0 2lv>S't 8.87 0.28 0.2*/ 0.26 0.21 0.20 0.20 0.20 0.19 0.17 0.16 0.20 0.71 0.40 0.46 0.41 0:32 0:29 0.30 0.29 0.27 0.22 0.22 f) 89-*^ ' - l-.ll 0.41 0.39 0.36 0.28 0:26 0.27 0.26 0.25 0 31 0.20 Q.tt'W 1.88 0.38 0.37 0.33 0.27 0.25 0.26 0.25 0.24 0.20 0.20 0.25/JS .1 :^{ 1.11 0.41 0.39 0.35 0.28 0.26 0.27 0.26 0.25 0.21 0.20 0.25: 1.85 0.31 0.30 0.28 0.23 0.22 0:22 0.22 0.21 0.18 0.18 8.50 0.26 0.25 0.24 0.20 0.19 0.19 0.19 0.18 0.16 0.16 0.19:.m .. 0:88 0.60 0.56 0.49 0.36 0.32 0,34 0.33 6.31 0.25 0:24 6'33-IH 0.4b 0.55 0.52 0:45 0.34 0.31 0.32 0.31 0.29 0:24 0.23 n%li , 0.64 0.51 0.48 0.42 0.32 0.29 0.31 0.30 0.28 0.23 0.22 0.30 sO-fHI Chapter 10. Moisture from condensation or other sources materially re duces the heat-flow resistance of insulation. INSULATED CONSTRUCTIONS--HOW TO USE TABLE 16 , Tables 5 through 15, U values are given for many common types of Duuding wall, floor, and ceiling constructions. For such of these construc10ns as contain an air space, the tabulated U value is based on the assump_ ion that the air space is empty, and that its surfaces are of ordinary build ing materials of low thermal reflectivity, such as wood, masonry, plaster or paper. Considerable benefit in reducing the heat transmission coefficient a construction can be effected by the application of thermal insulating materials in the air space. vajF^H p[ovides a means of determining, without calculations, the U infill6*- between-framing area of such constructions with the added V vat 10n instidled m the air space. Column 1 of Table 16 refers to the. Colum168 o't unmsulated constructions as taken from Tables 5 through 15. structinS ^ ^ f the table give corresponding coefficients Vi for the con- SDace <^aS- varius insulating applications in the between-framing air C D ' hy the column headings. Table 16 is in 5 parts, (A, B, ' na E) corresponding to the type of building element and the direc-