Lumber, its manufacture and distribution . ill not be disturbed by frostheaving. The lumber is piled on 6- by 6-inch timbers placed on top ofthese bottom supports. AIR-SEASONING 209 A type of built-up block is shown in Fig. The advantage ofbuilt-up blocks is that they can be moved more readily than solid blocks,and it is easy to build up a foundation to the level desired. Solid con-crete bottoms extending for the entire pile width are not satisfactorybecause they retard the circulation of air. Softwoods are often stacked in square or box piles while hard-woods are placed in narrow piles,
Lumber, its manufacture and distribution . ill not be disturbed by frostheaving. The lumber is piled on 6- by 6-inch timbers placed on top ofthese bottom supports. AIR-SEASONING 209 A type of built-up block is shown in Fig. The advantage ofbuilt-up blocks is that they can be moved more readily than solid blocks,and it is easy to build up a foundation to the level desired. Solid con-crete bottoms extending for the entire pile width are not satisfactorybecause they retard the circulation of air. Softwoods are often stacked in square or box piles while hard-woods are placed in narrow piles, preferably 6 feet in width. One acrewill store approximately 1,000,000 board feet of 1-inch, 16-foot lumberwhen piled in squares and one hundred rounds high. This includes areasonable allowance for dolly-ways and other unoccupied space. Each runway is marked by some letter of the alphabet and the pilebottoms are numbered consecutively for ease in location. The desig-nation of the former often is placed on a signboard at points of access,. Fig. 133.—Built-up Concrete Foundations for Lumber Piles. The Blocks a are16 by 16 Inches square and either 4 or 6 Inches in Height. Blocks b have a16-by-16-inch Base 6 Inches high and a 12-by-12-inch Top. Blocks c have aBase 12 by 12 inches, a Top 8 by 8 inches, and a Height of 6 Inches. Timbers6 by 6 or 6 by 8 Inches in Cross-section are placed on the Blocks and serve asCaps on which the Lumber is piled. and the latter is painted on the front with white lead. By having eachbottom clearly numbered much time is saved by truckers in locatinggiven stacks of lumber. Piling Methods. The best piling practice is to place lumber of the same length in apile, because when various lengths are put together long boards willproject from the end of the pile and, being unprotected, are liable towarp and check. As softwoods are sold largely in standard lengths,there is less lumber handling than would occur if random lengths wereplaced together. Although ha
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1922
