Document 85RvOMo2Ny7a1vxKm6ygavLqo

116 CHAPTER 6 1948 Guide Table 2... Conductivities (k) and Conductances (C) of Building and . Insulating Materials--Continued These constants are expressed in Bin per {hoar) {square foot) {Fahrenheit degree temperature difference). Conductivities {k) are per inch.thickness and conductances ,{C) are for.thickness or construction stated. not per inch thickness. See notes on Page 115. Heat Transmission Coefficients of Building Materials 117 TABLE.2i . Conductivities (&) and Conductances (C) of Building and' Insulating Materials--Continued These constants ore expressed in Btu per (hour) (square foot) (Fahrenheit degree temperature difference). Conductivities (ft) are per inch thickness and conductances (O are for thickness or. construction stated, not per inch thickness. .Material Description Density (Lb pbb Co Ft) Mean Temp (Fahb Deg) Conductivity OB . Conductance it) CO Resistance Per Inch Thickness For Thickness listed a)(t) oa B WOODS--(Continued) Hard maple, 0 per cent moisture*___ 46.0 Maple.........,,................. ___ 44.3 Maple, across grain........ ..........- - 40.0 Norway pine, 0 per cent moisture*---------- 32.0 32.0 Red oafr, 0 per cent moisture*..........-- .. 48.0 Short leafyellow pine, 0 per cent moisture* 36.0 Soft elm, 0 per cent moisture*---------------- 34.0 Soft maple, 0 per cent moisture*...... 42.0 Sugar pine, 0 per cent moisture*....... ..... 28.0 Virginia pine............................. - -- .-- 34.3 West coast hemlock, 0 per cent moisture* . 30.0 White pine.......... ........... ............ ... . 31.2 Yellow pine_____ __ _______ Sawdust, various.... ......................... .......... 12.0 Shavings, various from planer.......------- - 8 Shavings, from maple beech and birch (coarse) .................... ........ 13.2 75 86 75 75 75 75 75 75 75 75 86 75 86 90 90 90 1.05 1.10 1.20 0.74 .... 0.79 1.18 0.91 0.88 - 0.95 0.64 __ .... 0.96 __ 0.79 -- 0.78 1.00 0.41 -- __ 0.41 .... 0.36 0.95 0.91 033 135 137 035 1.10 1.14 1.05 136 1.04 137 1.28 1.00 2.44 2.44 2.78 ___ . Ai-r-m ___ ...... ____ ___ ____ -- -- ,----- ___ ,___ -- ( (l) ( (4) (4) (4) (4) ( (4) (1) (4) (1) 3) (1) (1) (1) INSULATING MATERIALS Blanket and Bat Chemically treated wood fibers held Insulations___..._________ between layers of strong paper------------ Eel grass between strong paper.-------------- Eel grass between strong paper.................. Flax fibers between strong paper.------------ Chemically treated hog hair between kr&ft paper ............ ------- ....--..... Chemically treated bog. hair, between kraft paper and asbestos paper------ ----- Hair felt between layers of paper.............. ' -- -- - i ......... Stitched and crcped expanding fibrous blanket. ___ ____ --......... -- Paper and asbestos fiber with emulsified asphalt binder..: . ,, ................. Cotton insulating bat. - . :. Cotton fibers Short Staple lintere, Fireproofed--.... Short Staple Lintere, fireproofed........... Short Staple linters. Fireproofed......... Short Staple linters, Fireproofed......... Short Staple linters. Fireproofed_____ Short Staple Iintere, Fireproofed------- Felted hair and asbestos______ __________ Ground paper between two layers, each H in. thick made up of two layers of kraft paper (sample % in. thick)--------- 3.62 4.60 3.40 4.90 70 90 90 90 5.76 "71 7.70 11.00 1.00 71 75 90 130 70 4.2 94 0.875 72 6.25 4.50 2.45 1.60 0.85 0.65 13.00 11.00 7.80 90 90 90 90. 90 90 90 90 90 12.1 75 0.25 -0.26 0.25 0.28 __ __ 4.X 335 . 4.00 337 -__ (1) jw - (1) 0.26 __ 335 - . ...... (3k, 0.28 0.25 0.24 __ 3374.00 4.17 ...... (3) ___ ?) (1) 0.27 3.70 -- (3) 0.28 0.24 -__ 337 4.17 -- (3) 0.25 0.24 0.24 0.26 0.29 0.30 0.26 0.26 0.28 __ 4.00 ; _ 4.17 '__ 4.17 335 ' -- 3.45 333 ' ------ * 334 " __ -v : 334 __ 337 __ --___ ___ U) (1) (1) Cl) 1) (1) (!) CJ CD -- 0.40 230 . (4) Reflective. See Table 1, Section C.,,. --' .. -- -- -- ' L_ . Made from sugar cane fiber----- -------------- 13.5 70 033* , 3.03 . (3) Made from corn stalks...... ... ............ 15.00 71 033 3.03 --.... (3) ... . Made from exploded wood fibera--~-- 17.90 78 15.20 .70 032 ..... / 3.12 - (4) 032 3.12 . ___ (3) __Made from wood fiber.................. ....... 15.90 72 033 3.03 (*> 15.00 Made from wood fiber......___ ........... 70 52 033 033 __ 3.03 . 3.03 _ (3) (8) 8.50 15.20 72 . 039 033 3.45 3.03 __-- (3) I3! Made from wood fiber___ _______-- 16.90 90 034 -- 2.94 -- a) See notes on Page.115