Shipping Weights of Lumber

SHIPPING WEIGHTS OF LUMBER The lumber manufacturer usually makes quotations upon the basis of delivery of the lumber to any point desired. To do this, it is necessary for him to know the weight of the product, in order to figure freight charges and add them to his f. o. b. mill price. For this reason, the grading rules of practically all lumber manufacturers' associations carry tables of estimated weights of lumber when dried to what is called "shipping condition." These weights are, of course, somewhat arbitrary; but they are based upon long experience, and are fair approximations of the weights of the commercial products which they represent. So far as they vary from actual weights, the estimated weights are likely to be a little higher than the exact weights. On the other hand, there is so much difference in the weight of wood depending upon the amount of seasoning, that not infrequently lumber is shipped when it is decidedly heavier than the estimated weights.

Softwoods Estimated shipping weights of typical products of the principal softwoods in condition are indicated in Table 11.

Hardwoods The estimated shipping weights for rough inch lumber of the common hardwoods in airdry condition, are indicated in Table 12.

Table 12 Shipping Weights of Hardwoods (Rough Inch Lumber-In Lbs. per 1,000 Feet, Board Measure) Ash, Black ... 3,200 Gum, Red 3,300 Ash, White ... 3,500 to 3,800 Gum, Sap 3,000 to 3,100 Basswood .... 2,500 to 2,600 Hickory 4,500 to 5,000 Beech 4,000 Mahogany .... 3,500 Birch 4,000 Maple, Hard. 3,900 to 4,000 Buckeye 2,600 Maple, Soft... 3,000 to 3,300 Butternut 2,500 to 2,800 Oak 3,900 to 4,000 Cherry • 3,800 to 4,000 Poplar, Yellow 2,800 Chestnut .... 2,800 Sycamore 3,000 to 3,200 Cottonwood .. 2,800 Tupelo 2,800 Elm, Rock ... 3,800 to 4,000 Walnut 4,000 Elm, Soft .... 3,000 to 3,300 Kiln-DriedOak Flooring, rx11", 1,000 lbs.; "x2", 1,200 lbs.; 13/16"s 11", 2,000 lbs.; 13/16"x2", 2,100 lbs.; 13/16"x21", 2,200 lbs.

Maple, Beech, and Birch Flooring, rx11" or 21", 1,000 lbs.; 13/16"x11" or 21", 2,100 lbs.