Document LK21w9mDo1daQnnrE4VerKKR5

106 CHAPTER 9 1959 Guide Co.***. Table 7____Coefficients of Transmission (U) of Masonry Walls* .*.* B. * IkooH (*n.'fool| (FrfmnM**,,.- <** I****- h-- *.*- I~ *W. and a based oft on outride wind uehdty o/ 15 mph fmm^iL Wflfl O 1 Resistances used are given below in this table or in Table S or 4 Construction Resistance (R) 1. Outside surface (15 mph wind)......................... 0.17 2. Face brick (4 in.) (av. R.)..................................0.39 3. Cement mortar 04 in).......................................... 0.10 4. Concrete block (cinder agg.) (4 in.)................ /.// 5. Air space1*.. ". Gypsutn lath 0i in.).----- /. Plas. (sand agg.) 04 n) 8. Inside surface (still air). Example of Subrfitufioft Resistances used are given below in this table or in Table 3 or 4 Replace items 6 and 7 with wood panels 04 in.) and vapor barrier applied over furring strips Total resistance.......................................................... 5.8 Deduct 6! Gypsum lath (% in.)................ 0.33 7. Plas. (sand agg.) 04 in)-- 0.09 0-4 Difference................................... Add 6. Vapor barrier--------- 7. Wood panel 04 in.). 0.05 . 0.94 Total resistance U *= l/R = 1/3-83 See value 0.26 in boldface type Total resistance.. V - l/R - H4-49 * Material Atal lath ond] ^ bi Plas. on r Furring (Sand |(U. wt (Sand |(U. wt. oggj iggj agg.) agg.) Gypsum loth nsut Bd. Lath 04 mj and $4 1 4 In) ond )4 tn. Plas. on Furring Furring No Sand 1 t. wt. No Sand plas. aggj agg.) plas agg.) 0.32 0.41 0.64 1.43 1.52 UUU U U GH 1 J Wood lath 14 to pics. (Sand agg.) 0.40 U K Face brick 4 in. 0-44\ Stone 4 in. 0.50| Precast concrete (sand agg.) 4 in. 0.52] 6 in. 0-48| Concrete block (Cinder agg.) (4 in.) (8 in.) (12 iD.) (Lt. wt. agg.) (4 in.) (8 in.) (12 in.) (Sand agg.) (4 in.) (8 in.) (12 in.) 1.60 3.00 3.37 0.71 1.11 1.38 0.39 0.32 0.30 0.34 0.29 0.27 0.46 0.39 0.37 0.28 0.24 0.22 0.23 0.21 0.31 0.25 0.23 0.27 0.23 0.21 0-25 0.21 0.20 0.41 0.32 0.35 0.28 0733 0.27 0.26 0.25 0.21 0.23 0.21 0.18 0.22 0.22 0.21 0.18 0.24 0-22 0.19 0.21 0.20 0.17 0.20 0.20 0.19 0.17 0.30 0.29 0.27 0.22 0.27 0.26 0.25 0.21 0.26 0.25 0.24 0.20 0.20 0.28 0.18 0.23 0.17 0-22 0.19 0.24 0.17 0.21 0.16 0.20 0.22 0.29 0.20 0.26 0.20 Hollow clay tile (4 in.) (8 in.) (12 in.) Concrete (Sand agg.) (4 in.) (6 in.) (8 in.) l.ll [ 0.41 0.35 0.28 /.85 0.31 0.30 0.28 0.23 3.30 0.26 0.25 0.24 0.20 0.52 0.48 054 0.66 0.49 0.52 0.45 0.48 0.42 0.19 0.26 0.22 0.19 0.25 0.21 0.18 0.21 0.18 0.16 0.20 0.18 0.16 0.26 0.22 0.19 0.31 0.33' 0.31 0.31 0.29 0.30 0.28 0.25 0.24 0.23 0.24 0.23 0.22 0.33 0.31 0.30 Common brick 4 in. Precast concrete (saDd agg.) 0.64 Concrete block (Cinder agg.) (4 in.) (8 in.) (12 in (Lt. wt- agg) (4 in (8 in 0 (12 in.,) (Sand agg.) (4 inT (12 in 0.36 0.35 0.32 0.26 0.29 0.29 0.26 0.22 0.28 0.27 0.25 0.21 0.32 0.30 2.00 0.27 0.26 2.27 0.25 0.25 0.7/I 0.42 040 l.ll 0.36 0.35 1.38 0.34 0.33 0.28 0.25 0.23 0.36 0.32 0.30 0.23 0.21 0.20 0.29 0.28 0.25 Hollow clay tUe (4 in.) (8 in.) (12 in.) Concrete (Sand agg.) (4 in.) (6 in.) (8 in.)_____ 0.35 0.32 0.28 0.26 0.23 0.22 0.52 0.50 0.48 0.42 0.32 0.48 0.47 0.44 0.39 0.31 0.64 0.43 0.41 0.37 0.29 * See text section Calculation Overtl! Coefficients for b< b To adjust U value* for tbe effect ol added inaulatioa b 0.25 0.24 0.23 0.19 0.19 0.24 0.21 0.20 0.17 0.17 ) 0.21 0.20 0.19 0.17 0.17 0.20 0.22 0.21 0.18 0.18 0-22 0.20 0.19 0.16 0.16 0.20 } 0.19 0.19 0.18 0.16 0.16 0.19 0.27 0.25 0.21 0.21 0.27 0.24 0.23 0.19 0.19 0.24 3 0.24 0.23 0.22 0.19 0.18 0.24 0.23 0.19 0.19 0.24 0.20 0.19 0.17 0.17 0.20 8 0.18 0.18 0.17 0.15 0.15 0.18 0.30 0.28 0.23 0.22 0.30 0.28 0.27 0.22 0.22 0.28 7 0.28 0.27 0.26 | 0.21 0.21 Heat Transmission Coefficients of Building Materials 107 Table 8 .... Coefficients of Transmission (l/) of Masonry Cavity Walls* Coefficient* ore expressed m Btu per {hour! (square /oof) {Fahrenheit dogree difference in temperature between the air an the fwo tides), and are bated an an outside wind velocity of 15 etph Example--Well H 6 Example of Substitution Resistances used are given below in this table or tn Table 3 or 4 Construction Resistance (A) 1. Outside surface (15 mph wind)......................... 0.17 2. Common brick (4 in.) (av. R.).......................... 0.78 3. Airspace*.................................................................. 0.97 4. Concrete block (grave! agg.) (4 in.)................ 0.71 5: Air space*.....................................................................0.07 6. Gypsum lath (? in.)............................................... 0.38 7. Plas. (lt. wt. agg.) 04 in.)................................... 0-55 8. Inside surface (still air)...................................... 0.68 Resistances used are given below tn this table or in Table 3 or 4 Replace item 4 with 8 to. concrete block and items 6 and 7 with % in. plas. (sand agg.) applied directly to concrete block. Total resistance........................................................... 4-90 Deduct 4. Concrete block (gravel agg.) 4 in................................................. 0.7/ 5. Air space....................................... 0.07 6. Gypsumlath 04 in.)................. 0.33 7. -Plas. (It. wt. agg.) 04 in.)___ 0.33 3.33 Total resistance...................................................... 4 00 U ^ l/R ^ \/4#Q <*............................................0.20 See value 0.20 in boldface type in table below. Difference....................................................................... 3.68 Add 4. Concrete block (gravel agg.) 8 in............................. ................................ l.ll 7. Plas. (sand agg.) 04 in)................ 0.11 1.32 Total resistance -..................................................... 3.80 V - l/R = 1/5.80...................................................... 0.26 To Adjust If Value* for Construction with Added Insulation1 between Inner and Outer Tier* or between Furring Strip*, See Table 16 Inferior Finish Exterior Construction Material X Av. it Inner Section None Restrionar Plas. % in. on Wall Metal Lath and % tn. Plav on Furring (Sand (U. wt. (Sand Lt. wt. agg) agg.) oggj ogg.) OJI 0.39 0J3 0.47 Gypsum lath 04 bv) and }4 In- Fla*, on Furring Wood InsuL Bd. lath lath and i4 in- Flos, on Furring M InFla*. No 0.32 (Sand (It. wt. ogg.) agg.) 0.41 0.64 No plas. 1.43 (Sand (Sand agg.) egg-) 1.52 0.40 E Z Material U U U It U U U U U U U R AB C 0 E f G H 1 JK Face brick (4 in.) 0-44 Concrete block (4 in.) (Gravel agg.)........ 0.7/ (Cinder agg.)........ 1.11 (Lt. wt. agg.)....... 1.60 Common brick (4 0.80 0.34 0.30 0.27 0.33 0.32 0.29 0.26 0.32 0.30 0.27 0.24 0.29 0.25 0.22 0.21 0.24 0.23 0.21 0.19 0.22 0.23 0.21 0.20 0.23 0.23 0.21 0.19 0.23 0.22 0.20 0.19 0.21 0.19 0.17 0.16 0.18 0.18 0.17 0.16 0.18 0.23 0.21 0.19 0.23 1 8 3 4 Clay tile (4 in.)....... 1.11 0.30 0.29 0.27 0.22 0.21 0.21 0.21 0.20 0.17 0.17 0.21 5 Concrete block (4 Common brick (4 in.) 0.80 Concrete block 0.76 (gravel agg.) (4 in.) 0.71 (Gravel agg.) 0.71 (Cinder agg.)........ 1.11 (Lt. wt. agg.)....... 1.60 Common brick (4 in)............................ 0.80 0.30 0.27 0.2S 0.30 0.29 0.26 0.24 0.29 0.27 0.25 0.22 0.27 0.23 0.21 0.19 0.22 0.21 0.19 0.18 0.21 0.22 0.20 0.19 0.21 0.21 0.20 0.18 0.21 0.80 0.19 0.18 0.20 0.18 016 0.15 0.17 0.17 0.16 0.15 0.17 0.21 0.20 0.18 0.21 6 7 8 9 Clay tile (4 in.)___ 1.11 0.27 0.26 0.25 0.21 0.19 0.20 0.20 0.19 0.16 0.16 0.20 10 Concrete block (4 (cinder agg.) 1.11 (Gravel agg.)........ 0.71 0.27 0.27 (Cinder agg.)........ l.ll 0.25 0.24 (Lt. wt. agg.)....... 1.60 0.23 0.22 Common brick (4 m.)............................ 0.80 0.27 0.26 Clay tile (4 in.)....... 1.11 0.25 0.24 0.25 0.23 0.21 0.24 6.23 0.21 0.19 0.18 0.21 0.19 0.20 0.18 0.17 0.19 0.18 0.20 0.20 0.19 0.18 0.17. 0.17 0.20 0-20 0.19 0.18 0.19 0.18 0.17 0.19 0.18 0.17 0.16 0.15 0.16 0116 0.16 0.15 0.14 0.16 0.15 0.20 0.18 0.17 0.20 0.18 U 18 13 14 15 * See text section Calculitin* Over*!! Coefficient* tor bed* ol calcuhtiaas. To adjust U values for the effect of added insulation between framing members, see Table 10. c If insulation is to be used in the cavity it should be a water resistant type.