FIELD: forest industry. SUBSTANCE: lumber with decay in the core is divided into parts in the longitudinal direction. The crust and the low-quality layer are removed from the obtained parts. The processing surfaces of similar shape and slope in length are created. The obtained fellings are rotated relative to each other by 180° in the vertical and horizontal planes and are fastened into a beam with two sloping surfaces. It is possible to glue the fellings. It results in obtaining a beam with two sloping surfaces with the consequent sawing into the lumber products. EFFECT: enhanced efficiency. 1 cl, 8 dwg
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