Standard Test Methods for Specific Gravity of Wood and Wood-Based Materials
|Publication Date:||1 July 2007|
|ICS Code (Wood, sawlogs and sawn timber):||79.040|
|ICS Code (Wood-based panels in general):||79.060.01|
significance And Use:
The specific gravity of wood gives an excellent measure of the amount of wood substance present in a sample. Thus, it may serve as a valuable indicator of the amount of wood pulp that could be... View More
The specific gravity of wood gives an excellent measure of the amount of wood substance present in a sample. Thus, it may serve as a valuable indicator of the amount of wood pulp that could be produced, the workability of the material, or the strength characteristics of a specimen or a species. It should be recognized that specific gravity varies between trees, within a tree, and between species. Since the specific gravity of wood substance is practically constant for all species (approximately 1.53), it is apparent that individual specific gravity values are indicative of the amount of wood substance present. It affords a rapid and valuable method for selection of wood for specific uses.
It may be desirable to know the specific gravity of a living tree, a structural member already in place, a log cross section, a segment of a research element, or the earlywood or latewood layer. The specimen thus may be large or small, regular or irregular, and at a variety of moisture contents. These test methods give procedures that include all of these variables and provides for calculation of specific gravity values to degrees of accuracy generally needed.View Less