Document JNeLpoDqrLZkQBRJgbkexN7ZX

HEATING VENTILATING AIR-CONDITIONING CUIDE 1943 Table 6. Coefficients of Transmission (V) of Frame Interior Walls and Partitions'! Coefficients are expressed in Bin per hour per square foot per degree Fahrenheit difference in temperature between the air on the two sides, and are based on still air (no wind) conditions on both sides. TYPICAL CONSTRUCTION sfumiL jrtW s rune it 0Ar* Wall No. DOUBLE PARTITION (Finished on Both Sides or Studding) Single Pabtition (Finish on One Sms or Studding) Air Space' Between Studding Flaked Between Studding Rock Wool FHP Between Studding Flexible Insulation Between Studding (One Air Space). Type of Wall Wood Lath and Plaster On Studding Metal Lath and Plaster* On Studding Plasterboard ($$ in.) and Plaster* On Studding AB CD E 77 0-62 0.34 0.11 0.076 0.21 78 0.69 - 0.39 0.11 0.078 0.23 79 0.61 0.34 0.10 0.075 0.21 Plasterboard in:) and Plaster* On Studding--bright aluminum foil ce mented to plasterboard on surface nailed to studding . . 80 0.42 0.24 0.16 H in- Rigid Insulation and Plaster* On Studding 1 in. Rigid Insulation and Plaster* On Studding 1H in. Corkboard and Plaster* On Studding 2 in. Corkboard and Plaster* On Studding 81 0.35 82 0.23 83 . 0.16 84 0.12 0.18 0.12 0.081 0.063 0.0S3 0.066 0.052 0.045 0.063 0.054 0.044 0.038 0.14 0.097 0.070 0.057 Computed from factors marked by in Table 2. "Plaster on metal lath assumed % in. thick. Thickness assumed 3H in. "Plaster assumed H in. thick. Table 7. Coefficients of Transmission (U) of Masonry Partitions'! Coefficients are expressed in Btu per hour per squarefoot per degree Fahrenheit difference in temperature between the air on the two sides, and are based on still air (no wind) conditions on both sides. . TYPICAL construction -pU/flttlrtT i nTwre*- No. Plain walls (No Plasteb) Plastered on One Side Walls Plastered on Bote Sides Type of Wall 4-in. Hollow Clay Hie 4-in. Common Brick 4-in. Hollow Gypsum Hie 2-in. Solid Plaster 85 86 ,87 88 "Computed from factors marked by * In Table 2. A 0.45 0.50 0.30 ;-- 108 B 0:42 0.46 0.28 ---. C 0.40 0.43 0.27 0.53 CHAPTER 4. HEAT TRANSMISSION COEFFICIENTS 109 X separated from lath and plaster ceiling by 1 in. furring strips. Bright aluminum foll.cemented to plasterboard