Archive image from page 14 of Cull factors for Sitka spruce,. Cull factors for Sitka spruce, western hemlock, and western redcedar in southeast Alaska cullfactorsforsi06kimm Year: 1956 ( Cull factors presented here are for the cull that occurred above these theoretical stunip heights except those presented for cull in the stiomps alone. Log lengths Log lengths were l6 feet plus trim allowance for all cubic- foot computations. For board-foot computations, l6-foot logs were used only for trees up to inches ; those 21 inches or larger were scaled in 32-foot logs. A minimum of 6
Archive image from page 14 of Cull factors for Sitka spruce,. Cull factors for Sitka spruce, western hemlock, and western redcedar in southeast Alaska cullfactorsforsi06kimm Year: 1956 ( Cull factors presented here are for the cull that occurred above these theoretical stunip heights except those presented for cull in the stiomps alone. Log lengths Log lengths were l6 feet plus trim allowance for all cubic- foot computations. For board-foot computations, l6-foot logs were used only for trees up to inches ; those 21 inches or larger were scaled in 32-foot logs. A minimum of 6 feet was used for the length of the top log. Top diameters Two different top diameters (diameter inside bark) were employed in all computations: a fixed top and the utilized top. The fixed top diameter was 8 inches for board-foot computations and k inches for cubic-foot computations. The utilized top (fig. l) was that actually cut in the logging operations. When no part of a tree was used, the utilized top was figured as 0 percent of the 60 D. B H (inches) Figure 1,—Average utilized top diameter (inside bark) for trees of different sizes of Sitka spruce, western hemlock, and western redcedar in Southeast Alaska. -5-
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