The first step in the supply- chain of our quality products begins in the forest. Through established contacts within the forest industry, we have over the years ensured a continuous supply of the root-butts for many years to come! Ansgarius Svensson AB selects root-butts after the special quality requirements. See below for Pine-Larch & Spruce and in taking consideration to forestry conservation.
Quality specification for butt logs for through-and-through sawing
Pine and larch
Butt-logs are to be branchless and free from swellings on the outside, are to be straight (max1% bow height), not spirally grown and without compression wood, rot, shakes, blue stain and insect damages. The logs must have fine-textured wood in the butt end. There shall be at least 20 year rings in an area between 2-8 cm from the pith (Max year ring width 3 mm).
For the rest the annual year ring shall have an even development. The pith shall be in the centre of the log. The logs shall be cut in the winter and must not be stored submersed in water.
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Spruce
The logs shall be straight (Max 1 % bow height) without rot blue stain, insect damage, shakes or compressed wood and not spirally grown. The logs must have fine-textured wood in the butt end. There shall be at least 20 year rings in an area between 2-8 cm from the pith (Max year ring width 3 mm). For the rest the year rings shall have an even development.
The pith shall be in the centre of the log. The logs shall be cut in the winter and must not be stored submersed in water.
Healthy knots: Max. 4 of 25 mm on the worst 15 dm log section. If there is only one knot it can be max. 45 mm. Knots below 15 mm can be in unlimited numbers.
Dead knots: Max. 4 of 20 mm on the worst 15 dm log section. If there is only one knot it can be max. 25 mm. Knots below 10 mm in unlimited numbers.
General: Log top diam. Preferably 22 cm and larger.
Lengths: 3, 60 – 6, 10 m.
According to VMR 1/99
