Document aMJEQ6ONnMBN2ybk2y4qya9

Heating Ventilating Air Conditioning Guide 1938 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 1 in. thickness, unless otherwise indicated. , Material Description "P E P O Eg S3 g. a* od i? 5s sS Ss ftc aS Eg3 St PaZ PaZ oo oo E- 8' H< 1 1 8 at, as aB o < INSULATION--LOOSE FILL OR BAT TYPE --Continued Glara Wooi. Granuiab_______ , ___ oiTim Fibrous material made from slap Fibrous material 25 to 30 microns in dia- meter, made from virgin bottle glass__ Made from combined silicate of lime and Alumina Made from expanded aluminum-magnesium silicate _ ** aa Flaked, dry and fluffy/___ * ** " 1.50 75 9.40 103 1.50 75 4.20 72 6.20 42 24.00 18.00 12.00 34.00 26.00 24.00 19.80 18.00 90 90 90 90 90 75 90 75 0.27 0.27 0.27 0.24 0.32 0.77 0.59 0.44 0.60 0.52 0.48* 0.35 0.34 INSULATION--RIGID BUILDING BOARDS Asbestos a a aa a am** Rock wool with a binding agent Rock wool with flax, straw pulp, and binder Rock wool with vegetable fibers___ From maple, beech and birch (coarse) Redwood hark 18.00 14.00 10.00 14.50 14.50 11.50 8.80 13.20 3.00 90 90 90 77 75 72 90 90 0.29 0.28 0.27* 0.33 0:38 0.31 0.41 0.36 0.31 No added binder____________ aa * ** * m * Asphaltic binder.. _ Chemically treated hog hair covered with film of asphalt____ __ , Made from corn stalks ____ ___ * " exploded wood'fibers__ * * hard wood fibers- Insulating plaster 9/10-in. thick applied to H-in, plaster board has* __ Made from licorice root* Made from 85% magnesia and 15% asbestos Made from shredded wood and cement.. Rii^op ni> fihor Sugar cane fiber insulation blocks encased in asphalt membrane__ Made from wheat straw__ * " wood fiber aa ** ** *a "* aa aa aa aa aa 14.00 10.60 7.00 5.40 14.50 10.00 15.00 17.90 15.20 54.00 16.10 19.30 24.20 13.50 13.80 17.00 15.90 15.00 8.50 15.20 16.90 90 0.34 90 0.30 90 0.27 90 0.25 90 0.32 .0.33* 75 0.28 71 0.33 78 0.36 70 0.32 75 1.07t 81 0.34 86 0.51 72 . 0.46 70' 0.33 70 0.30 68 0.33 72 0.33 70 0.33 52 0.33 72 0.29 0.33 90 0.34 Compressed cement ami asbestos sheets- _ 123.00 86 Oomurated asheston hoard 20.40 110 2.70 0.48 3.70 3.70 (3) (0 3.70 (3) 4.17 (3) 3.12 (3) 1.30 1.69 2.27 1.67 (1) in 1) .. (l) 1.92 . u 2.08 (3) 2.86 2.94 (1) (3) (1) 3.33 m 3.45 (i) 3.57 CD 3.70 . (1) 3.03 1) 2.63 3) 3.22 . (3) 2.44 (L) 2.44 (1) 2.78 a) 3.22 0) 3.33 2.94 3.33 3.70 4.00 3.12 0) (1) (1) (l> (1) 3.57 3.03 3.12 3.12 0.93 2.94 1.96 2.17 3.03 ) (3) S4> (3) j (3) (3) (1) (3) (3) 3.33.,-' (3) 3.03 (3) 3.03 (3) 3.03 (3) 3.03 (6) 3.45 (3) 3.03 (3) 2.94 ) 0.37 2.08 0) ( For notes see Page 97. 100 1 Chapter s. Heat Transmission Coefficients and Tables Table 2. Conductivities (k) and Conductances (C) of Building Materials and Insulators--Continued hniir net sauare foot Oer deeree Fahrenheit Material Description 5 g . g e. H *5 fid s * a i? iIs sS BS os g* pp og go OO t "If 15 ggS gS BJ < building boards --Continued nIjT--TTW Pressed asbestos mill board_______________ Sheet asbestos---------------- -- Gypsum between layers of heavy paper____ Rijrid, gypsum between layers of heavy paper Gdrin. thick)-- . . . --------- Gypsum mixed with sawdust between layers of heavy paper (0.39-in. thick)-- -- (^in.) (H in-)-----................. .................................. 60.50 48.30 62.80 53.50 60.70 _____ -- 86 110 70 90 90 __ -- ROOFING CONSTRUCTION Asphalt, composition or prepared__________ Built up--54-iu- thick .. ... ......... Built up, bitumen and felt, gravel or slag surfaced*- ..... ...............--............. .. Plaster board, gypsum fiber concrete and 3-ply roof covering 2M in. thick Asphalt -- Slate Wood- ... 70.00 __ 52.40 65.00 70.00 201.00 -- 75 __ 76 75 75 ~ PLASTERING MATERIALS Metal Lath and Plaster.--. Wood Lath and Piaster.--. Gypsum, typical ... ..... Thickness $4 in.--____--............................ ............ Total thickness K in...... .......... . __ %-in. plaster, total thickness in. --_____ __ 73 70 0.84 0.29 1.41 2.60f 3.60f 3.73f* 2.82f* 1.19 3.45 0.71 0.38 0.28 0.27 0.35 6.50f* 3.S3f` 1.33 0.58f 6.00t* 6.50t* 10.37* 1.28f 0.1S 0.28 0.75 1.72 0.17 0.15 0.10 0.78 8.00 3.30* 8.SOt 4.40f* 2.50f* 0.13 0.30 0.11 0.23 0.40 id (2) (3) (1) (1) __ ~ (3) __ (2) (4) (3) ((73)) " (2) (4) __ (4) BUILDING CONSTRUCTIONS Frame .. _.. _____ 1-in. fir sheathing and building paper...:-._____ 1-in. fir sheathing, building paper, and yellow pine lap aiding____ 1-in. fir sheathing, building paper and stucco Pine lap aiding and building japer--siding 4 in. wide________ Yellow pine lap riding----- ------- Battleship linoleum 0-in.)- __ 40.00 30 . 0.71f* .1.41 20 O.SOf 2.00 20 0.55 1.82 _16 0.85t* 1.18 1.28t* 0.78 75 1.20 0.83 1.36f* 0.74 W- (4) (4) (4) (3) AIR SPACE AND SURFACE COEFFICIENTS Am Spaces Over faced with ordinary building materials____ 40 l.lOt* 0.91 (4) Surfaces, Ordinary____ __ Still air (/i) - 1.65f* 0.61 (4) 15 mph--(/o). 6.00t* 0.17 (4) Surface, Rough Stucco 15 mph--(Jo) 9.00t* 0.11 (4) Surface. Bright Aluminum Still air (/i")b____ -- - 0.80f 1.25 (8) AIR SPACES PACED WITH BRIGHT ALUMINUM FOIL Air apace, faced one side with bright alumi- nnm foil, over -in. wide Air space, faced one side with bright alumi- 50 0.46f* 2.17 (4) nnm foil, %-ia. wide- 50 0.62f 1.61 (4) Air space, faoed both aides with bright aluminum foil, over $i-in. wide Air space, faced both sides with bright 50 0.41f* 2.44 (4) aluminum foil, %-m. wide____ -- 50 0.57f 1.75 (4) For notes see Page 97. 101 /