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The Spruce Production Division was a unit of the United States Army established in 1917 to produce high-quality Sitka spruce timber and other wood products needed to make aircraft for the United States' efforts in World War I. The division was part of the Army Signal Corps's Aviation Section.
Interfor produces lumber for residential, commercial and industrial applications. [5] It uses several species of wood in its products, including Douglas Fir, Western Hemlock, Western Red Cedar, Ponderosa pine, Lodgepole pine and Southern Yellow Pine. It markets European Spruce and Red Pine lumber through a sales agreement with Ilim Timber. [6]
Picea sitchensis, the Sitka spruce, is a large, coniferous, evergreen tree growing to just over 100 meters (330 ft) tall, [2] with a trunk diameter at breast height that can exceed 5 m (16 ft).
The process of manufacturing at the Sitka Pulp Mill consisted of utilizing about 70 percent of Western Hemlock and 30 percent Sitka Spruce. The mill was able to debark logs as large as 1.8 meters in diameter and 7.2 meters in length. The warehouse and dock were able to accommodate 17,000 tons of baled pulp.
Spruce is the standard material used in soundboards for many musical instruments, including guitars, mandolins, cellos, violins, and the soundboard at the heart of a piano and the harp. Wood used for this purpose is referred to as tonewood. Spruce, along with cedar, is often used for the soundboard/top of an acoustic guitar. The main types of ...
The loudest wood tops, such as Sitka Spruce, are lightweight and stiff, while maintaining the necessary strength. Denser woods, for example Hard Maple, often used for necks, are stronger but not as loud (R = 6 vs. 12). When wood is used as the top of an acoustic instrument, it can be described using plate theory and plate vibrations.
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