Document ppaE0YQYXqw25xVGGb4NpZ94X

American Society of Heating and Ventilating Engineers Guide, 1935 Table 2, Conductivities (k) and Conductances (Ca) of Building Materials and Insulators--Continued The coefficients ore expressed in Btu per hour Per square foot per degree Fahrenheit Per 1 in. thickness unless otherwise indicated. Material Description SB Ee ie pp gg oo Mi 1! <3 a AIR SPACE AND SURFACE -COEFFICIENTS--------- Aib Spacer^...................... . Subpaces, Obdinart....... -- Over 9^-in. faced with ordinary building Surface, Bright Aluminum 40 60 l.iot* 1.65f* 6.00f* I.I8f 0.91 0.61 0.17 0.85 AIR SPACES FACED WITH BRIGHT ALUMINUM FOIL Ais space, faced one side with bright olumi- Air space, faced one side withbright alumi- Air space, faced both sides with bright Air space, faced both sides with bright 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 K*in- apart, in 0.46f" 0.62f 0.4lf 0.57f 2.17 0.23t* 50 0.31f 3.23 O.lSf* 0. Ilf* 50 0.09f* 11.11 WOODS/(Across Grain) Balsa....................... ..... 20.0 0.58 7.3 CaliporniaJRedwood_____ 22.0 0.66 0% ' " --.......................................-- 28.0 75 0.70 8% .......................... 22.0 75 0.70 8% * ................................. 28.0 0.75 16% * 22.0 75 0.74 16% * _ ................... ..... . 28.0 75 0.80 Cypress.. Douglas Fir.. ft% mntnflire 28.7 0.67 0% 0.67 8%.. 26.0 0.66 8% 16% " 34.0 75 0.75 26.0 75 0.76 u& 34.0 0.82 Eastern Hemlock... 22.0 75 0.60 0% 30.0 75 0.76 8% 22.0 75 0.63 8% * ................................ .............. 30.0 75 0.81 16% 22.0 75 0.67 Hard Maple__ 16?$ --.............................................................. 30.0 75 0.85 Otyft moisfiirp 40.0 1.01 0% 8% * 8% * 46.0 1.05 40.0 75 1.08 46.0 75 1.13 16% * 40.0 75 1.15 16% * ....................................... ....... 46.0 75 1.21 For notes see Page 95. 98 1.72 1.53 1.43 1.43 1.33 1.35 1.25 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 | D ensity 1 (La per Cu Ft) 1 D ensity (L b per C u Ft ) The cceffi/`iints are expr Material in Btu per.hour per square foot per degree Fahrenheit per l in. thickness, unless otherwise indicated. Description sg sS. -- %s --. Si S8 i gS ee PP g o g. 0/0. MS i1 s5 Pi K es o cc s < -WOODSrrContinued _ Lokglsap Yellow Pine-- MtBOQANTMaple---------Maple ob OaK- Nobway Pnet-- Red Cypress-- 0% moisture... 0% 8% 8% 16% 16% ` 0% moisture-. 0% *- 8% `- 8% * - 16% * - 16% .* - 0% moisture- Red Oak__ SsoBTUAr Yellow Pine. Soft Elm.. Soft Maple-- Scgab Potb... Vraowu Pms____ West Coast Hsmlock__ White Pine__ Yiuow Pma_ Yellow Pine or Fra i6% ; ~ 16% . * ~ 0% moisture-. 0% '* - 8% * 16% " 16% * - 0% moisture-- 0% ` _ 8% ` 8% `~ 16% ' _ 16% ' - 0% moisture-- 0% 8% - 8% "- 16% * - 16% " - 0% moisture- 0% " ... 8% `- 16% 16% "... 0% moisture... 0% * - 8% ` ... 8% ` ... 16% * ... 16% ... 0% moisture- 0% - 8% . * . ... 8% 16% * _ 16% .. For notes see Page 95. 99 30.0 40.0 30.0 40.0 30.0 40.0 34.3 44.3 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 * ----- "75 "0776" - J732" " nr - 75 0.86 1.16 (4) 75 0.83 1.21 (4) 75 0.95 1.05 (4) 7S 0.89 1.12 (4) 75 1.03 0.97 (4) 86 0.90 1.11 0) 86 1.10 0.91 (I) 1.15* 0.87 75 0.62 1.61 (4) 75 . 0.74 1.35 (4) 75 0.68 1.47 (4) 75 0.83 1.21 (4) 75 0.74 1.35 (4) 75 0.91 1.10 (4) 75 0.67 75 0.79 1.49 Jt> 1.27 (4) 75 0.71 1.41 (4) 75 0.84 1.19 4) 75 0.74 - 1.35 (4) 75 0.90 1.11 (4) 75 0.98 1.02 (4) 75 1.18 75 1.03 0.85 0.97 (4) <4) 75 1.24 0.8! (4) 75 ; 1.07 ' 0.94 (4) 75 . 1.29 75 0.74 0.78 1.35 (4) (4) 75 0.91 1.10 4) 75 0.79 1.27 (4) 75. 0.97 1.03 (4) 75 0.84 ; T.i9 (4) 75 1.04 0.96 W ` 75 0.73 75 .0.88 1.37 1.14 (4) (4) 75 0.77 1.30 (4) 75 0.93 1.08 (4) 75 0.81 1.24 <4> . 75 0.97 1.03 (4) 75 0.89 1.12 (4) 75 0.95 1.05 (4) 75 0.96.. 1.04 (4) `75 ' 1.02' 0.98 (4) 75 75 1.01 1.09 0.99 0.92 (4) $ 75 :0.54 1.85 & 75 : 0.64 1.56 (4) 75 0.59 1.70 (4) 75 0.71 1.41 <4) 75 0.65 1.54 (4) 75 0.78 1.28 (4) 86 0.96 1.04 (1) 75 0.68 . 1.47 4) 75 0.79 1.27 (4) 75 0.73 1.37 (4) 75 .0.85 1.18 (4) -75 0.78 1.28 (4) 75 '. 0.91 1.10 W 86 10.78 . 1.28 (1) 1.00 1.00 W 0.80* 1.25 ;V