Increase of Sawlog Yield Through Expanding the Range of Lengths in Products of Logging Assortments
Sawlogs length from softwood is 4 to 6 meters on logging enterprises of Karelia. The three basic length are 4,3; 5,5; 6,1 meters. But length of saw timber has to be 1 to 6,5 meters with 0,25 meters gradation according to State Standard (GOST) 24454-80. So, assortment of the sawlogs lengths can be changed. In this article the yield of sawlogs volume is compared between the two variants. The first variant is the logging when sawlogs is produced by the three lengths of 4,3; 5,5; 6,1 meters. The second variant is when sawlogs is produced by the five lengths of 4,3; 5,5; 6,1; 3,6; 3,9 meters, with two auxiliary lengths of 3,6 and 3,9 meters. The yield of sawlogs volume is 5 to 11 % for pine stand, 5 to 8 % for spruce stand, 4 to 8 % for mix stand (56 % - pine and 33 % - spruce). The data was obtained for average dimensional characteristic of timber stand in Karelia and depending on priority.