Document DdGoM1RvJNkgGvemmDQveqrxn

Table 2. Conductivities (k) and Conductances (O' of Building and------- Insulating Materials These constants are expressed in Blu Per hour per square foot per degree Fahrenheit temperature difference. Conductivities (&) are per inch thickness and conductances (O are for thickness or construction stated, not Per inch thickness. Material. Description Density (Lb per ,Cu Ft) Mean Temp (Dbg Fabb) Conductivity or Conductance ft) (O Resistance- Per Inch' Thitkness For Thicknes Listed' (!) . (!) BUILDING BOARDS (Non-Insulating)____ Compressed cement and asbestos sheetsTM.. Corrugated asbestos board--_________ ___ Pressed asbestos mil) board.. Gypsum board--gypsum between layers of heavy paper:__________________ ____ _ H in. gypsum board......... ........................... M in* gypsum board,................ ........... ....... Yi in. gypsum board...................................... 123 20.4 603 ' 623 533 86 110 86 70 90 2.70 037 ' 0.48 2.08 034 1.19. 1.41 0.71* 3.73 2.82 2.60 0.27* 035 0.38 (3) FRAME CONSTRUCTION 1 in. fir sheathingand building paper......... -- 30 .TMTM. 036 COMBINATIONS.....:...-...... 1 in. fir sheathing, building paper ami yellow pine lap siding. 20 0.50 1 in. fir sheathing, building paper and stucco............. -.......................................... 20 032 Pine lap siding and building paper, siding .4 in. wide...................................... .......... 16 0.85 Yellow pine lap siding..TM...................TM........ -- 1.28 1.16* 2.00*- 132 1.18* 0.78* MASONRY MATERIALS Brick..... ............................ Damp or wet........... .................... ................. Common yellow clay brick*........ ........-...... .TM One tier yellow common clay brick, one tier face brick, approx. 8 in. thick*.......... -- .TM 5.0* 0.20* 43 031 0.77 -- 130 (4) Clat Tile, Hollow... 2 in. Tile, H in.*plaster both sidesTMTMTM...... .4 in. Tile, in* plaster both sides................. 6 in. Tile, Yi in. plaster both sides..... ....... 8 in. TUe, average of 8 types (Walls No. 59,63,64,66,67,90,91,92*)_______ TM... 12 in. Clay tile wall: 8 in. x 5 in. x 12 in. and 4 in. x 5 in. x 12in... 120.0 127.0 1243 -- __ 110 100 105 TM. __ -- 1.00 0.60 0.47 032 ___ 036 TM.TM. 1.00 1.67 2.13 . 1.92. 3.84 (4)-S Sand and gravel aggregate, various ages and mixes...TM..TMTM.TMTM____ __...________ _ _ _11.35 to 0.09 to . _ 1636 0.06 Sand and gravel aggregate..TM.....TM.............. 142 : 75 12.6 0.08 limestone aggregate...._____ ___ ___TMTM.... 132 75 103 0.09 _ Cinder aggregate.TM..-._______________ 97 75 4.9 032 Steam treated limestone slag aggregate*.... 74.6 75 237 0.44 ___ Pumice (Mined in California) aggregate*.. 65.0 75 2.42 0.41 Expanded burned day aggregate*.............. 59.9 75 238 0.44 Burned day aggregate----TM_____ __ ___ . 67.1 75 236 TM. 035 Blast furnace dag aggregate 76.0 70 "1.6 0.63 Expanded vermiculite aggregate.... ............ 20 90 0.68 1.47, Expandedvernriculite aggregate 26.7 90 0.76 132 -- Authorities: >U. S. Bureau of Standards, tests based on samples submitted by manufacturers. *A. C. Willard, L. C. Lichty and L. A. Harding, tests conducted at the University of Illinois. *J. C. Peebles, tests conducted at Armour Institute of Technology, based on samples submitted by manufacturers.- t . <F. B. Rowley, et al, tests conducted at the University of Minnesota. A.S.H.V.E. Research Laboratory. . ' E. A. AUcut, tests conducted at the University of Toronto. See Thermal.Conductivity of Building Materials, by F. B. Rowley and A. B. Algren (University of Minnesota Engineering Experiment Station Bulletin No. 12). ^ Heat Transmission Through Insulation as Affected'by Orientation of Wall, by F. B. Rowley and C. E. Lund (A.S.H.V.E. Transactions, Vol. 49, 1943, p. 331). _ The Effect of Convection in Ceiling Insulation, by G. B. Wilkes and L. R. Vianey (A.S.H.V.E. Trans actions, Vol. 49, 1943, p. 196). '*See A.S.H.V.E. Research Report No. 915---Conductivity of Concrete, by F. C. Houghten and Carl Gutberlet (A.S.H.V.E. Transactions, Vol. 38, 1932, p. 47). Recommended value. (See Heating, Ventilating and Air Conditioning, by Harding and Willard, revised edition, 1932). /See BMS13, U. S. Department of Commerce, National Bureau of Standards, Washington, D. C. 'Roofing, 0.15 in. thick (1.34 lb per square foot), covered with gravel (0.83 lb pet square foot), combined thickness assumed 0.25. ^Recommended Value for computing heat transmission coefficients. See also Table 3. Heat' Transmission Coefficients 89 :________-Taele.2. Conductivities (k) and Conductances (C) of Building and Insulating Materials--Continued---------------------------------------------- These constants are expressed in Blu per hour per square foci Per degree Fahrenheit temperature difference. Conductivities (k) ore per inch thickness and conductances (C) ore for thickness or construction stated, not per inch thickness. Material masonry materials --(Continued) Concrete--(Continued).... Description Density (Lb per Cu Ft) Mean Temp (Dso Fabb) Conductivity or Conductance (*) (O Resistance Per Inch Thickness For Thickness Listed (!) (!) Expanded vermiculite aggregate................. Expanded vermiculite aggregate................ Concrete plank.............................................. Cellular concrete Cellular concrete Cellular concrete Cellular concrete............................................ 35 50 76 40.0 50.0 60.0 70.0 0.80 1.10 2k ,1.08 1.44 1.80 2.18 1.16 0.91 0.40 0.04 0.69 0.56 0.46' (3) (3) (3> (3) (3) (3) (3) 8 In. Concrete Blocks I a I > U tart cancrtM Mckt 8 in. three oval core, sand and gravel aggregate*.................................................. 8 in. three oval core, crushed limestone aggregate*................:......... _........__......... 8 in. three oval core, cinder aggregate*..... 8 in. three oval core, burned clay aggre- 134.3 86.2 S in. three oval core,. expanded. blast furnace slag aggregate*.................______ 0.86 0.58 1.16 1.73 2.00 2.04 (4) 12 In. Concrete Blocks a 12 U >*.! UT UMWWIH n s~\ a`- IB- u u. s.J 12 in. three oval core, sand and gravel aggregate*.;....... ........................... -........... 12 in. three oval core, cinder aggregate*.... 12 in. three oval core, burned clay aggregate*............................................... 124.9 86.2 1.28 1.88 (4) Gtpsum... 3 in. solid gypsum partition tile*.___;..TM.. 3 in. three col gypsum partition tile*___ 4 in. three cell gypsum partition tile*...... 87M per cent gypsum, 12H per cent wood Gypsum plaster--.TMTM.TM.TM..TM................... mastering materials Gypsum plaster, *4 in. thick........... Cement plaster...... Wood, lath and plaster, total thickness H* Gypsum plaster and expanded vermi- culite, 4 to 1 mix...... ............................... Insulating plaster 0.9 in. thick applied to H in- gypsum board________ __ --____ 39.9 54.0 HOOFING Asbestos shinglei Asphalt, composition or prepared.............. Asphalt shingles......................... .................. Built-up roofing, bitumen or fdt, gravel or lg surfaced'................... Slate. Wood shinglei 65.0 70.0 70.0 WOODS BalsaTM California redwood, 6 per cent moisture*.. CypressTM.___ _________ Douglas fir, 0 per cent moisture*TM Eastern hemlock, 0 'per cent moisture"..... Long leaf yellow pine, 0 per cent moisture* Mahogany... 20.0 83 73 28.0 28.7 34.0 30.0 40.0 343 See notes on Page 88. 1.66 3.30 0.74 0.60 0.60 0.30 830 8.00 2.50 135 1.67 133 10.00 038 0.38 .033 0.70 0.67 0.67 0.76 036 0.90 0.75 0.10* 1.72 2.63 3.03 1.43 1.49 1.49 132 1.16 1.11 0.93 0.17* 0.15* 0.15* 0.78*