Document Yr4Y1dJodLE9kaGKdKyVxBj1O

112 Am. Soc. of Heat.-Vent. Engineers Guide, 1922 A// G/V/A1 JO A1/307JA OJIMOA// c u F~r o f a/p p s p u / v e a p f t o f s a s p p e p /m e t e p p e p f~r/rsu r s Am. Soc. of Heat.-Vent. Engineers Guide. 1922 113 Transmission Constants for Building Materials Buffalo Forge Co. Fan Engineering Brick Walls hickness Plastered Air Space and Furred and Inches Plain One Side Plastered Plastered" 4 0.52 0.50 0.28 834 13 1734 0.37 0.29 0.25 0.36 0.28 0.24 0.2S 0.21 0.19 0.23 0.20 0.18 22 0.22 0.21 0.16 0.16 2634 0.19 0.18 0.14 FOR CONCRETE WALLS ADD 20 PER CENT. TO ABOVE VALUES Outside Walls of Frame Building-Lath and Plaster Inside. Outside Construction Inside Ordinary Stud Partition Clapboards 7/16" thick.................. Same with paper lining............... Same with 34" sheathing............. Same with paper and 34" sheath 0.44 0.31 0.28 Lath and plaster, one side........... Lath and plaster, both sides.... Sheet Iron siding............................. Corrugated Iron siding................. 0.60 0.34 1.20 I SO ing ......................................"......... 0.23 Thickness of Board Inches A 1 1A 2 2A FOR VARIOUS WALL CONSTRUCTIONS Pine Board 0.77 0.51 0.43 0.35 0.30 Double Board Paper Between 0.32 0.24 0.19 0.16 0.14 Board and Corrugated Iron 0.45 0.36 0.30 0.26 0.23 Board and Sheet-Iron 0.50 0.40 0.33 0.28 0.25 DOUBLE P' BOARDS WITH SAWDUST BETWEEN Sawdust Inches 2 4 6 8 B. t. u. 0.127 0.083 0.062 0.049 FOR FLOOR SURFACES Single wooden floor, no plaster beneath joists......................................... ............ .. 0.45 Same, lath and plaster beneath joists...... .............................. ................ ....... : 0.20 Double wooden floor, no plaster beneath joists......... i.................................... 0.31 ' Same, lath and plaster beneath joists...,........ ..................................... ............ 0.18 Concrete--see concrete walls , ,, , :. Assume temperature of unheated floor space beneath the floor.at one-half the difference in temperature between indoors and outdoors. , FLOORS LAID ON THE GROUND Cement or tile, no wood above........................................... Cement or tile, wood floors above................................... : Dirt, no floor whatever ................................................. Wood, single, laid near ground........................................... Assume temperature of earth as plus 30 to 50 F. 0.31 0.10 0.20 0.10 FOR GLASS SURFACE AND DOORS Single windows ......................................................................... Double windows ........................................................................ Single skylight ........................................................................... Double skylight ........................................................................ Pine Doors, 1" ........................................................................... " 134" ..................................................................... ;" / " 2"...................................................................... ,....................... 1.09 0.46 1.16 0.48 0.41 0.32 0,27