For example, afromosia has a specific gravity (sg) of 0.705 while ebony can have a sg of 1.12 (1120 kg/cu.m). As well knowing the weight of lumber can be important if you are planning on transporting a load of lumber from the lumber yard to your home, as shown in … Density is the weight or mass of a unit volume of wood, and specific gravity the ratio of the density of wood to that of water. wood)) (9) GWT wb = average green weight per cubic foot of combined wood and bark GWT w = average green weight per cubic foot of wood GWT b = average green weight per cubic foot of bark Table 1B provides estimates of oven-dry and green weight for combined wood and bark when only wood volume is known. Lumber and Wood Weights. APPROXIMATE WEIGHTS OF WOOD IN Lbs./Cu. Ft. Approximate Weights of Wood in LBS./Cu. As both the weight and volume of wood vary with the amount of moisture in it, specific gravity as applied to wood is an indefinite quantity unless the circumstances under which it is determined are specified. One the one hand there is the humble Narra, with good workability and dimensional stability (much like other members of the Pterocarpus genus)—on the other hand there is the exotic and highly-prized burl wood known as … The specific gravity of a substance is its weight divided by the weigh t of an equal volume of water. Ft. Local codes should be consulted for live load requirements. The density of wood differs from type to type depending on the tree growth environment, tree species, and the tree area measured for density calculation. The ratio of dry weight and green volume of the given wood is the basic wood density. More wood content in a specific volume means it has a high density. The weight of wood is dependant on its moisture content; green ash weighs 53 pounds per cubic foot when fresh but only 40 pounds when seasoned. Species Green Airdry Alder, red 46 28 Ash, black 52 34 Ash, commercial white 48 41 Ash, Oregon 46 38 Aspen 43 26 Basswood 42 26 Beech 54 45 Birch 57 44 Birch, paper 50 38 Cedar, Alaska 36 31 Cedar, eastern red 37 33 Specific weight of wood and wood; Specific gravity liquids and solutions; Specific material weights; Specific weight pile substances; Specific weight of gas and vapors; Specific weights - Quick search; Technical dictionary; Mass and volume of water; Greek alphabet; English technical terms; General tables. Round Wood 1MFBM = 5.1282 m3 1 Cord = 2.4070 m3 1 Cunit = 2.8317 m3: Lumber 1 MFBM = 2.3598 m3 1 Cord = 1.1075 m3 1 Cunit = 1.3029 m3: Wood Residues (includes chips, shavings, sawdust & bark) NOTE: Weight of wood and wood products will vary as the moisture content varies and as density of grain varies. Comments: This wood has a seeming split personality. As specific gravity is just a comparison, it can be applied across any units. *APPROXIMATE WEIGHT CHART* lbs per Lineal Ft. lbs per board ft Full Unit Qty Green Douglas Fir 2x3 DF S4S 1.25#/lf 2500#/MBF 256 Comprehensive list of specific gravities Knowing the weight of lumber or wood can come in handy if you are doing load calculations for a floor or deck. the two indications of the weight, make reference to the wood conditions green and seasoned woods specific weight of material and characteristic data of beam and structural steel Weight of manufactured products should be verified with manufacturer. Seasoned cedar weighs between 23 and 31 pounds, depending on the species, and fir ranges from 25 to 27 pounds.