Document 0gEdB7ODX4Ngxq4gaKMGgdmpJ

American Society of Heating and Ventilating Engineers Guide, 1930 The thicknesses upon which the coefficients in Tables 12 to 36, inclusive, are based, are as follows : Brick veneer........... ........................................................................ 4 in. Plaster and metal lath.....................-........................................... K in. Plaster (on wood lath, plasterboard, rigid insulation, board form, or corkboard)............ ........................ ................ ....... Slate (Roofing)...................... ........................... ............................ 54 in54 in. Stucco on wire mesh reinforcing.,,............................................. 1 in. Tar and gravel or slag-surfaced built-up roofing.,.................... Wood shingles (average thickness)............................................. % in54 in. 4F23W21l)-5--i-4no4-io-simiiiinnnndnh......sfLLLLLLlioduuuuuuoimmmmnmmrgibbbbnbbeeeoegeerrrrrrr((c(((M((SSSSSlSaa------p222222pb------lSSSSSeoS)))a)).).--o.,..,r......dr..............O............(......a.a...........v....k........e...).........r......,a...............g..............e..........................t.........h...............i.....c.............k............n.................e................s.............s.............).........................................................................,.........................................................................................................................-.l2I5223551555445i5s4s24444 in. in. in. in. in. inin. in. I Table 8. Conductivities (k) and Conductances (C) of Building Materials and Insulations Based on Tests Conducted at the University of Illinois, By A. C. Willard, L. C. Lichty and L. A. Harding V Material Description Density (Lb. per Cu. Ft.). Mean Temp. (Deg. Fahr.) _ CONDUC- TIVITY (ft) OR Conduc tance (C) Asbestos.......................... Asbestos Board................. Brickwork............. Cement mortar Concrete................... Corkboard___.................... 2 in. hollow clay tile, M in. plaster both sides........... 4 in. hollow clay tile, H in. plaster both sides. 6 in. hollow clay tile, H in. plaster both sides... Magnesia Board.................. Plaster . Roofinv*.... Stucco................. Wood (Fir, one- surface finished. Mortar bond and dry conditions......... Stone 1-2-4 mix.____ __________ Built-up bitumen and felt, gravel or slag surfaced................ Built-up bitumen and felt, gravel or 48.3 20.4 132.0 140.0 9.7 120-.0 127*0 124.3 13.5 33.4 110 110 100 110 105 110 0.29 0.48 4.00 5.001 . 8.00f . 8.30 . 0.32 **' 0.47b 8.00* 1.325d 5.30d-b 8.0QI : 1.00 v __ ___________ ____ _____ .v, vuc auvuuuura ustcu, cuuKuieiauie wor*t oi importance per- . taining to Che heat transmission of various types of construction and materials has been done by the late Prof. John R. Allen and Prof. A. J. Wood of the Engineering Experiment Station of Pennsylvania State, College- - r. bFor thickness stated or used in construction, not per 1 in. thickness. ^Calculated from 2 in. tile tests. ' fCement mortar and stucco assumed same as cement plaster. assugmReodof0in.2g5, .0.15 in. thick (1.34 lb. per sq. ft.), covered with gravel (0.83 lb. per sq. ft.),'combined thickness ' *The conductivity of plaster varies with the composition. Note-range of values from 2.32 to 8.0. The average value for plaster is probably about 5.0. On account of the comparatively high conductivity of plaster and the fact that it 4s seldom applied more than *4 in. thick, this material does not appreciably effect the overall transmission of a construction, excepting in the case of thin uninsulated walls. . iRecommended value. See Mechanical Equipment of Buildings, by Harding and Willard, Vpl. I. second edition. 1929, p. 182. 24 Chapter 2--Heat Losses from Buildings Table 9. Conductivities (k) and Conductances (C) of Building Materials and Insulations Based on Tests Conducted at Armour Institute of Technology, By J. C. Peebles p Material Description Density Lb. per . Iv. Ft.) Mean Temp. (Deg. Fahr.) Conduc- TtVITY (ft) OR Conduc tance (O Aerocrete........ ................ --__1 AAAeeerrrooocccrrreeettteee...-..--.--.-.---..-.-.--.--.-.-.--.--.--.--------------:-------.......... Cellular concreteCellular concrete... Cellular concrete-- Cellular concrete.. Asbestos shingles.------------ Asphalt shingles.-------------Balsam Wool*1--------------- .. Chemically treated wood fibre with with plain paper___ _--__ _______ Beaver Fibre WallboardCalicel-............. ......... .......... .. .. Commercial thickness % in--............ . Granular fill insulation made from combined silicate of lime, and alumina...... .............................-......... - Celotex. Rigid insulation made from sugar cane fibre.... ............ -...... ------ ----------- ---- Certamteed Insulating Board________ _____ ____ Concrete..... ........................... Concrete............--................... Dry Zero Blanket**................ Commercial thickness % in........ ....... _ Stone--..... --______-........................... ..... Cinder............ ... .--................................. Pliable slab form of insulation made from ceiba fibres.,............................... Dry Zero Blanketh................ Pliable slab form of. insulation made from ceiba fibres............ ....... ...... Dry Zero Blanket**.......... --~ Pliable slab form of insulation made from ceiba fibres___________ ..... Flax-li-numh.---------------------- Flax fibre............................... ...... ......... Haydite Concrete.................. Heat treated clay aggregate concrete.... Homasote "A M Building Made from wood and other vegetable Board......................... ----Inso Board....... --................. fibres chemically treated.......-........... Rigid insulation made fromwheatstraw Insulite--............... -- Keystone Hair**.................. -- Rigid insulation made from wood pulp.. Hair felt between layers of paper; }i in. thick___ ________ -- Lith.............................. -- Rock wool, flax and straw pulp with binder...................... ............................ Maftex.--.............. ................ Rigid insulation made from licorice roots......... ............. .............................. Maple Flooring------- ----------- Across grain............... -.....-.................... Masonite................... ------ Rigid insulation made from exploded wood fibre__________ --______ ____ Plaster Board.-____________ Gypsumbetween layers of heavy paper Pyrocell or Insulex-.............. Cellular gypsum--dry-------- --------------- Pyrocell or Insulex---------- .... Cellular gypsum--dry--.................... , Pyrocell or Insulex.... ....... J... Cellular gypsurm--dry........................... Pyrocell or Insulex................ Cellular gypsum--dry--........... ......... Roofing................. .................. Composition or prepared...................... . Sprayo-Flake.......................... Shredded paper with silica binder........ Thermofil... ........................... Dry, fluffy, flaked gypsum.................... Thermofil..............._........... ... Dry, fluffy, flaked gypsum................_... Thermasote "A" "" j Made from wood fibre, chemically Insulating Board.... ' treated...................... ............... ........... Torfoleum.-.......... ............. .-- Peat moss compressed into sheet form Weatherwood.,,............. ........ Rigid insulation made from hard pine fibres......... ........................................... Wood Lath and Plasterk___ Lime plaster.......................... .... ............ Yellow Pine___ __ _ Across grain............................................ 40.0 50.0 60.0 70.0 65.0 70.0 3.62 4.2 13.5 25.9 145.0 110.0 1.9 1.6 1.5 12.1 73.0 22.2 17.0 16.5 11.0 14.5 16.1 40.0 19.8 62.8 30.0 24.0 18.0 12.0 4.5 24.0 18.0 18*6 11.0 72.0 75 75 75 75 75 75 70 72 70 . 75 75 75 75 75 ` 70 75 68 70 '75 75 81 75 75 70 75 75 75 75 75 75 75 75 70 70 75 1.06 1.44 1.80 2.18 6.00b 6.50b 0.25 0.50 0.24 0.33 0.39 6.30 5.20 0.23 0.24 0.24 0.30 ^ 1.62 ' 0.38 0.33 0.34 0.25 0.38 0.34 1.20 0.33 1.41 0.92 0.74 0.57 0.40 6.50b 0.25 0.48 0.34 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 Prof. A. J. Wood of the Engineering Experiment Station of Pennsylvania State College. *>For thickness stated or used in construction, not per 1 in. thickness. l*Not compressed. kThickness 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. 25