Document XRY6Y9bBrgJX4wGXJnk6Jq06R

American Society of Heating and Ventilating Engineers Guide, 1932 Table 6. Conductivities () and Conductances (C) of Building Materials and Insulations . Tests Conducted at Armour Institute of Technology, by J. C. Peebles.p Insulation Tests Based on Samples Submitted by Manufacturers Material Description Density (Lb. per Cu. Ft.) Aerocrete-- .......................... Cellular concrete. ....................................... Arborite....................................... Rigid insulation made from wood pulp Balsam Woolb-........................ Beaver Fibre Wallboard____ Calicel____ . ___ . --........ Celotex.... .................................... Certainteed Insulating Chemically treated wood fibre between plain paper....................... . ........ Granular fill insulation made from combined silicate of lime and alumina Rigid insulation made from sugar cane fihre Cincrete Block,`8 in.Hollow Treated cinder aggregate concrete........ Concrete____ ____ ___________ Cinder Dry Zero Blanketb_________ Pliable slab form of insulation made from ceiba fibres..................................... Dry Zero Blanketb................. Pliable slab form of insulation made from ceiba fibres..:........ ......................... Dry Zero Blanketb................. Pliable slab form of insulation made from ceiba fibres.. ___________ ... Flax-li-numb ______ ___ Homasote "A** Building Made from wood and other vegetable Inso Board....................... .......... Rigid insulation made from wheat straw Insulite................-............ Rigid insulation made from wood pulp.. Keystone Hairb........................ Hair felt between layers of paper; K in. thick_________ ___ _ ___ ____ Lith.............................................. Rock wool, flax and straw pulp with binder______________________ ____ _ ... Li noboard--------------- ------ ------- Slab form of insulation made from rock wool and vegetable fibres___... Maftex,, .................................. Rigid insulation made from licorice roots................................. ...................... .. Maizewood................................. Rigid insulation made from cornstalks Maple Flooring......................... Masonite. ........................ ....... Rigid insulation made from exploded wood fibre- - ................................ ..... Plaster Board............................ Gypsum between layers of heavy paper Pyrocell or Insulex___ Pyrocell or Insulex Pyrocell or Insulex Roofing...... ,,....... .................... .. Snravo-Flake....... Temlok....................... ;........... . Thermatex.................. .. ............ Thermax...................................... Thermofil.......... ................. . Thermofil.................................... Thermasote "A" Composition or prepared. Shredded paper with silica binder Rigid Insulation made from wood fiber Rigid Insulation made from wood fiber Made from shredded wood and cement Dry, fluffy, flaked gypsum. - ............. Dry, fluffy, flaked gypsum. _ ......... .. Made from wood fibre, chemically Torfolenm Weatherwood Wood Lath and Plasterk Yellow Pine ... Peat moss compressed into sheet form Rigid insulation made from hard wood fibres.......................,,............................ ...... Across grain................................................... 40.0 50.0 60.0 70.0 15.2 65.0 70.0 3.62 4.2 13.5 25.9 145 O 110.0 1.9 1.6 1.5 12.1 22.2 17.0 16.5 11.0 14.5 9.9 11.5 16.1 15.0 40.0 19.8 62.8 30.0 24.0 18.0 12.0 4.5 15.0 8.5 24.2 24.0 18.0 18.6 11.0 15.2 Mean Temp. (Deg. Fahr.) 75 75 75 75 75 75 70 CONDUC-O tivity (k) OR Conduc tance (C) 1.44 0.33 6.50b 0.25 0.50 72 0.24 70 0.33 75 75 75 75 75 70 75 68 70 75 75 72 72 81 70.5 75 75 70 75 75 75 75 75 70 72 72 75 75 75 70 70 75 0!33b 5I2O 0.23 0.24 0.24 0.30 6.33 0.34 0.25 0.38 0.296 . 0.311 0.34 0.325 1.20 0.33 1.41 n 57 * 6.50b 0.25 0.33 0.294 0.46 0.48 0.34, 0.26 0.32 2.0b 1.00 In addition to the conductivity values for the authorities listed, considerable work of importance per taining to the heat transmission of various types of construction and materials has been done by the late Prof. John R. Allen and the late Prof. A. J. Wood of the Engineering Experiment Station of Pennsylvania State College. bFor thickness stated or used in construction, not per I in. thickness. bNot compressed.. ^Thickness of lime plaster and wood lath from back of lath to face of plaster, about % in. pSee Chapter LX, by Chas. H.' Herter of the Report of the Insulation Committee, A. S. R. E., Annual Meeting, 1922, Revised to 1924, entitled. Heat Transmission of Insulating Materials for a more compre hensive collection of heat'transmission data relating to building and insulating materials.* 34 Chapter 3--Heat Transfer Through Materials and Constructions example, the value of U for a 1 in. yellow pine floor (actual thickness, in.) placed directly on 5 in. concrete on the ground, is determined as follows: U = --------------,----- = 0.472 Btu per hour per square foot 1 0.781 5.0 1.34 + 1.00 + 8.30 per degree difference in temperature between the ground and the air immediately above the floor. The thicknesses upon which the coefficients in Tables 9 to 33, inclusive, are based, are as follows: Brick veneer....... ........................................ ............ -.................... 4 !n- Plaster and metal lath............................................... .................. 7* in. i Plaster (on wood lath, plasterboard, rigid insulation, board form, or corkboard)....... ................-..................................... 14 jn. Slate (Roofing)....................... 14 in. Stucco on wire mesh reinforcing---........................... ................ 1 m. Tar and gravel or slag-surfaced built-up roofing--.................... 7s jn. Wood shingles (average thickness).............................................. Ys in. Wood siding or clapboard (average thickness)............................... %in. 1-in. Lumber (S-2-S).......................................................................2542 in. l)4-in. Lumber (S-2-S)........................................................................ 1?16in. 2-in. Lumber (S-2-S).._.................................................................. 17s in. 2H-in. Lumber (S-2-S)........................................................................ ^^sjn. 3-in. Lumber (S-2-S)............................................................................ "^Ysjn'. 4-in. Lumber (S-2-S).............................. ^7s jn. Finish flooring (Maple or Oak).:....... `tis in. Table 7. Conductivities (k) and Conductances (C) of Building Materials and Insulations Based on Tests Conducted at the University of Minnesota, By F. B. Rowley o , Material Description Density (Lb. per Cu. Ft.) Mean Temp. (Dbg. Fahr.) CONDUC- TIVITY (k) OR Conduc tance (O Pliable stab form of insulation made Fir sheathing and building Fir sheathing, building paper and pine lap siding----------- Fir sheathing, building paper Srtlirf ................. Gypsum Fibre Concrete.-..... 87)-$% gypsum and 12>$% wood chips Lath and in. Plaster.------- Total thickness H in................................. Masonite........... --................... Rigid insulation made from exploded Pine lap-siding and building Lap siding 4 in. wide............. ................... Sheet Rock Pyrofill Roofing, Plaster board, gypsum fibre concrete Shredded paper with silica binder--------- 143.0 51.8 75.6 51.2 17.9 *52.4 5.9 68.8 30.0 20:0 20.0 69.9 75.9 74.4 . 70.0 ` 77.6 15.5 73.0 76.0 61. L 9.46 0.23 0.71b 0.50b 0.82b 1.66 2.96 1.66 2.50b 0.32 0.85b 8.8b 0.58b 0.28 ` a In addition to the conductivity values for the authorities listed, considerable work of importance per taining to the heat transmission of various types of construction and materials has been done by the late Prof. John R.- Allen and the late Prof. A. J. Wood of the'Engineering Experiment Station of Pennsylvania bFor thickness stated or used in construction, not per 1 in. thickness. pSee Chapter LX, by Chas. H. Herter of the Report of the Insulation Committee, A. S. R. E., Annual Meeting. 1922, Revised to 1924, entitled. Heat Transmission of Insulating Materials for a more compre hensive collection of heat transmission data relating to building and insulating materials. 35