Document V39keEErDMeBMKB3Ke0kqNgJ4

HEATING VENTILATING AIR CONDITIONING GUIDE 1942 Table 2. Conductivities (ft) and Conductances (C) of Building Materials and Insulators3--Continued The coefficients ere expressed in Btu per hour per square foot per degree Fahrenheit Per l in. thickness unless otherwise indicated. Description Cement Fme Coarse SAggrete Aggre gate Slump o. 4 No.4-M Per Cent K O-- MASONRY MATERIALS ^Continued Steam Treated Limestone Slag. Pumice Mined in Cali?.__ _____ Bt-Pboduct of Manufacture of Phosphates 7.00 8.00 8.00 8.00 Fineness Modulus 3.75 27.1 26.5 25.5 21.1 74.6 65.0 86.6 91.1 Expanded Burned Clat__ Burned Clat Aggregate-- Burned Clat Aggregate.. 8.00 8.50 8.50 18.4 21.8 21.8 57.9 67.1 67.1 Sand and gravel aggregate._____ :__________ Sand and gravel aggregate used for calcu lations..... Cores filled with 5.14 lb density Crushed limestone aggregate-__ Cinder aggregate. Cinder aggregate used for calculations_____ Cores filled with 69.7 lb density cinders-___ Cores filled with 5.12 lb density cork-__ -- Cores filled with 14.2 lb density rock wooL. Burned clay aggregate. Cores filled with 5.06 lb density cork. Exi ............. ... aggregate. 60% ie, 40% course. 134.3 86.2 h8 as 74.49 2.27 74.68 2.42 74.62 3.19 74.43 3.42 75.57 2.28 75.89 2.89 74.60 2.82 0.90t l.OOf* 0.56f* 0.86f* 0.58f 0.60f* 0.39t 0.25|* 0.27f* 0.50f* 0.21t 0.49| 0.44 0.41 0.31 0.29 0.44 0.35 0.35 1.11 1.00 1.79 1.16 1.73 1.66 2.56 4.00 3.70 2.00 4.76. 2.04 rS iff* Sand and gravel __ Sand and gravel aggregate used for calcu lations. Cinder aggregate.. Cores filled with 5.241b density c Burned clay aggregateCores filled with 5 6 lb density c 86.2 16~.T 0.78f 0.80f 0.53t* 0.24t* 0.47f Q.17t* Cinder aggregate... 100.0 Double wall with 1 in. air space between-- 100.0 1 in. space filled with 9.97 lbdensityrock wooI 100.0 l.OOf 0.36t 0.20f 1.00 2.78 5.00 5x8x12 block sand and gravel aggregate-- W 17 -`K-i rH 5 x 8 x 12 block sand and gravel aggregate*.. For notes see page 93. 94 0.38f (4) 0.95f (4) CHAPTER 4. HEAT TRANSMISSION COEFFICIENTS AND TABLES Table 2. Conductivities (ft) and Conductances (C) of Building Materials and Insulators3--Continued The coefficients are expressed in Btu per hour per square foot per degree Fahrenheit per 1 in. thickness unless otherwise indicated. Material Description D ensity (L b per C u Ft ) sg 5s 5a SG Ii i* zao azo OO -E 8 >Z !g| 3tt 3H OS QS fc aos X b < INSULATION--BLANKET OR FLEXIBLE TYPES FtBEB--------------------------------- TypicaL........... ........ .......................................-- Chemically treated wood fibers held between layers of strong paper/. Eel grass between strong paper/-- Flax fibers between strong paper/....... ............ Chemically treated bog hair between kraft paper/...... ................... .......--...... ............. ..... Chemically treated hog hair between kraft paper and asbestos paper/__ ____________ Hair felt between layers of paper/................... Kapok between burlap or paper/------ ---------- Jute fiber/______ Ground paper between two layers, each %*m- thick made up of two layers of kraft paper (sample thick)--___ _ Stitched and creped expanding fibrous blanket__--____ ___________________ . Paper and asbestos fiber with emulsified asphalt binder.--.---- -------------------------------- Cotton insulating bat.............--............... -- 3.62 4.60 3.40 4.90 70 90 90 90 5.76 71 7.70 11.00. 1.00 6.70 71 75 90 75 12.1 75 1.50 70 4.2 94 0.87S 72 0.27* 0.2S 0.26 0.25 0.28 0.26 0.28 0.25 0.24 0.25 0.40f 0.27 0.28 0.24 3.70 4.00 3.85 4.00 3.57 3.85 3.57 4.00 4.17 4.00 (3) ID ID (D (3) (3) 13) ID (3) 2.50 3.70 3.57 4.17 (4) (3) (1) (3) INSULATION--SEMI RIGID TYPE Fiber. INSULATION-LOOSE FILL OR BAT TYPE Fiber. Glass Wool Granulab__ Gtpsum. Mineral Wool______ Regranulated Cork. Rock Wool____ ____ Sawdust. Shavings. Felted cattle hair/-------------- Felted hair and asbestos/__ 75% hair and 25% jute/----50% hair and 50% jute/-- Jute/__________________ --Felted jute and asbestos/-- Compressed peat moss_____ 13.00 11.00 7.80 6.30 6.10 6.70 10.00 11.00 90 90 90 90 90 75 90 70 Made from ceiba fibers/----_ a Fibrous material made from dolomite and silica_________________________________ -- Fibrous material made from slag Redwood bark__________ -- --..... -- Redwood bark------------ ----------------------- ------Glass fibers 0.0003 in. to 0.0006 in. in dia meter................................................................ Made from combined silicate of time and alumina________ ___ __ _____-..................... Expanded vermiculite, particle size --10+20 Expanded vermiculite, particle size --8+16 Flaked, dry and fluffy/ AU forms, typical-----------About $6-in. particles........... ............................. Fibrous material made from rock___________ Rock wool with a binding agent.............. ........ Rock wool with flax, straw pulp, and binder Rock wool with vegetable fiWs____________ Various____________ Various from planer. From maple, beech and birch (coarse)__ 1.... 1.90 1.60 75 75 1.50 9.40 3.00 5.00 75 103 90 75 1.50 75 4.20 6.32 5.2 34.00 26.00 24.00 19.80 _18.00 8.10 21.00 18.00 14.00 10.00 14.50 14.50 11.50 12.00 8.80 13.20 72 86 90 90 75 90 75 90 90 90 90 90 77 75 72 90 90 90 For notes see Page 93. 95 0.26 0.26 0.28 0.27 0.26 0.25 0.37 0.26 3.84 3.84 3.57 3.70 3.85' 4.00 2.70 3.84 ID (D (D ID ID u> 111 (3) 0.23 0.24 0.27 0.27 0.31 0.26 0.27 0.24 0.29 0.41 0.60 0.52 0.48* 0.35 0.34 0.27* 0.31 0.30 0.29 0.28 0.27* 0.33 0.38 0.31 0.41 0.41 0.36 4.35 4.17 3.70 3.70 3.22 3.84 3.70 4.17 3.45 2.44 1.67 1.92 2.08 2.86 2.94 3.70 3.22 3.33 3.45 3.57 3.70 3.03 2.63 3.22 2.44 .2.44 2.78 (3) (3) (3) (D ID (3) (3) (3) (31 ID (O (1) (3) (1) (J) ID ID ID ID (1) ID <J> (31 w ID (D