Document dn3M7nQjLMzMBXJowwmyjvnoQ

American Society of Heating and Ventilating Engineers Guide, 1937 1 Table 6. Coefficients of Transmission (U) of Frame Interior Walls and Partitions Coefficients are expressed in Bus 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 riumt/rw i Ipu/xca Sft/t- DOUBLE PARTITION (Finished on Both Sides or Studding) Wall No. Single Partition (Finish on One Air Sms or Space Studding) Between Studding GKsrFlaked Between Studding Rock Wool Fill* Between Studding FteSbje Insolation Between Studding (One Air Stud Space Faced One Side with Bright Alumina Foil Space) Type of Wall Wood Lath and Plaster On Studding Metal Lath and Plaster0 On Studding Plaster Board (H in-) and Plaster* On Studding H in. Rigid Insulation and Plaster* On Studding 1 i n. Rigid Insulation and Plaster* On Studding 1M in. Corkboard and Plaster* On Studding 2 in. Corkboard and Plaster* On Studding 77 78 79 80 81 82 83 A 0.62 0.69 0.61 0.35 0.23 0.16 0.12 B 0.34 C 0.11 D 0.076 0.39 0.11 0.078 0.34 0.10 0.075 0.18 0.083 0.063 0.12 0-066 0.054 0.081 0.052 0.044 0.063 0.045 . 0.038 E 0.21 0.23 0.21 0.14 0.097 0.070 0.057 F 0.24 0.26 0.24 0.15 0.10 0.073 0.059 Computed from factors marked by * in Table 2. `Thickness assumed in. 'Plaster on metal lath assumed %-in. thick. 'Plaster assumed M-in. thick. Table 7. Coefficients of Transmission (IT) of Masonry Partitions Coefficients are expressed in Btu 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 No. Plain Walls (No Plaster) Walls Plastered on One Sms Walls Plastered on Both Sides . Type of Wall 4-in. Hollow Clay Tile 4-in. Common Brick 4-in. Hollow Gypsum Tile 2-in. Solid Plaster 84 85 86 87 "Computed from factors marked by * in Table 2. 120 A 0.45 0.50 0.30 __ -- B 0.42 0.46 0.28 -- Cx 0.40 0.43 0.27 0.53 ------------------ --- TYPICAL CONSTRUCTION TYPE OF FLOORING 121 Computed from factors marked by * in Table 2. bThickness assumed to be % in. Thickness assumed to be % In.