Document RpB7gbQvVOgX4oEmVrgLGwrgn

American Society of Heating and Ventilating Engineers Guide, 1937 Table 2. Conductivities (k) and Conductances (C) of Building Materials and Insulators--Continued The coefficients are expressed in Btu per hour per square foot Per degree Fahrenheit per t in. thickness, . unless otherwise indicated. D ensity (L b per Co Ft) Conductivity (k) OR C onductance (C) Material Description AIR SPACES FACED WITH BRIGHT ALUMINUM FOIL--Continued Air space divided in two with single curtain of bright aluminum foil (both sides bright) Air space with multiple curtains of bright aluminum foil, bright on both sides, curtains more than *^-in. apart, air circu lation between spaces prevented: Sa 'g 3a a S3 t 5 i. -i < s0 8 1 ctf oi 50 0.23f 4.35 <o 0.31f 3.23 > 50 0.15f* 6.78 (0 o.ur 9.22 hi 50 0.09f* 11.<6 (> SPACES FACED WITH NON- METALLIC REFLECTIVE SURFACE Fabric with con-metallic reflective surface (Ha in. thick) placed in center of a 1)4 in. 70 0.33t 3-. 03 0) Core of fiber board coated two sides with nan-metallic reflective surface .(% in. thick) placed in space having approxi mately % in. air space on each tide------- 23.4 70 0.27t 3.70 (3) Fiber board coated one tide with non- metallic reflective surface (& in. thick) placed in space having approximately in. air space on each side.. 75 0.49t 2.04 (3) Air space divided in two with fabric faced both sides with non-metallic reflective surface, each space over li-in. wide.-- 40 0.33f 3.03 ) Air space over %-in. wide faced one tide with non-metallic reflective surface.---------- 40 0.67f 1.49 H WOODS (Across Grain) California Redwood______ 0% *% 16% ia% * * * ........... 0% moisture-----------------------------------------n% R% * 8% * _ i" 16% ft% 8% 8% 16% 16% n% 8% 8% 16% * " * "' 20.0 8.8 7.3 22.0 28.0 28.0 22.0 28.0 28.7 26.0 34.0 26.0 34.0 26.0 34.0 22.0 30.0 22.0 30.0 22.0 30.0 40.0 46.0 40.0 46.0 40.0 46.0 ' 90 90 90 75 7575 75 75 86 75 75. 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 0.58 0.38 0.33 0.66 0.70 0.70 . 0.7S 0.74 0.80 0.67 0.61 0.67 0.66 0.75 0.76 0.82 0.60 0.76 0.63 0.81 0.67 0.85 1.01 1.05 1.08 1.13 1.15 1.21 For notes see Page 107. 112 1.72 2.63 3.03 1.53 1.43 1.43 1.33 1.35 1.25 1.49 1.64 1;49 1.52 1.33 1.32 1.22 1.67 1.32 1.59 1.23 1.49 1.18 0.99 0.95 0.93 0.89 0.87 0.83 (0 (1) 0) HI HI HI HI (4) HI 111 HI ( HI (4) HI (4) HI HI (4) (4) (4) (4) (4) (4) HI (4) (4) 0> i. Chapter 5--Heat Transmission Coefficients and Tables Table 2. Conductivities (k) and Conductances (C) of Building Materials and Insulators--Continued -.fceients are expressed in Btu per how Per square foot per degree Fahrenheit Per l in. thickness. Thecoejp unless otherwise indicated. Material Description p o Ea caa, S* ad 0. G a ca vs la S > as Z Eb po pa as as oo VO -io B- 1 t5 2og 3i T Hs o K n < WOODS--Continued Yellow Pine-- MaBOGAJTT-- Maple_ Maple ob Oax-----------Norway Pine-------------- Rxd'CtFRBSS----------- Red Oak. Sbobtleaf Yellow Pine-- Soft Elm.. Soft Maple________ Sugar Pine.. Virginia Pine_ West Coast Hemlock _ Werra Pinh_, Yellow PineZ Yellow Pine or Fm_. n% 8% 8% 16% 16% * n% 8% 8% 16% 16% 0% 8% 8% 16% 16% n% 8% 8% nw? 16% 0% 8% 8% 16% 16% 0% 8% 8% 16% 16% * * * * * * " * 8% 8% 16% 16% '* * * 0% 8% 8% 16% 16% 0% 8% 8% 16% 16% ------------------------------------------------------- 30.0 75 40.0 30.0 40.0 30.0 40.0 34.3 44.3 ____ 75 75 75 75 75 86 86 22.0 . 32.0 22.0 32.0 22.0 32.0 22.0 32.0 22.0 32.0 22.0 32.0 38.0 48.0 38.0 48.0 38.0 48.0 26.0 36.0 26.0 36.0 26.0 36.0 28.0 34.0 28.0 34.0 28.0 34.0 36.0 42.0 36.0 42.0 36.0 42.0 22.0 28.0 22.0 28.0 22.0 28.0 34.3 22.0 30.0 22.0 30.0 22.0 30.0 3_1_.2 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 7S 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 7S 75 7S 75 86 75 75 7S 75 75 75 86 __ ----------- -- -- . For notes see Page 107. 0.76 0.86 0.83 0.95 0.89 1.03 0.90 1.10 1.15* 0.62 0.74 0.68 0.83 0.74 0.91 0.67 0.79 0.71 0.84 0.74 0.90 0.98 1.18 1.03 1.24 1.07 1.29 0.74 0.91 0.79 0.97 0.84 1.04 0.73 0.88 0.77 0.93 0.81 0.97 0.89 0.95 0.96 1.02 1.01 1.09 0.54 0.64 0.59 0.71 0.65 0.78 0.96 0.68 0.79 0.73 0.85 0.78 0.91 . 0.78 1.00 0.80* 1.32 1.16 1.21 1.05 1.12 0.97 ' 1.11 0.91 0.87 1.61 1.35 1.47 1.21 1.35 1.10 1.49 1.27 1.41 1.19 1.35 1.11 1.02 0.85 0.97 0.81 0.94 0.78 1.35 1.10 1.27 1.03 1.19 0.96 1.37 1.14 1.30 1.08 1.24 1.03 1.12 1.05 1.04 0.98 0.99 0.92 1.85 1.56 1.70 1.41 1.54 1.28 1.04 1.47 1.27* 1.37 1.18 1.28 1.10 1.28 1.00 1.25 H) (*) <41 (4) (41 (4) <0 U> (4) (4) (4) (4) (4) (4) (1) (4) (4) (4) (4) (4) (*) (4) (4) (4) (4) (4) (4) 4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (1) (4) (4) (4) (4) (4) (4) (1) (3) 113