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A climate-smart sawmill industry

A climate-smart sawmill industry The sawmill industry started to prepare a low-carbon roadmap for the sector in the autumn of 2019. The preparation of the roadmap was based on the Finnish Government’s goal, according to which Finland should be carbon neutral by 2035 and carbon negative soon afterwards. To speed up the achievement of the

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Machine vision and measuring applications in timber manufacturing

Machine vision and measuring applications in timber manufacturing Machine vision is used in various measuring and grading systems in the sawmill industry’s processes. The most common include: log scanning sawing control quality grading systems of sawn goods Log scanning methods Log scanning units are located in log sorting and sawing lines. They use 3D scanners

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Handling dried timber

Handling dried timber After drying, stick-stacked timber loads wait for further processing. Storage conveyors transfer loads to the grading plant, where an unloading elevator lifts tilted loads one layer at a time. Each layer of timber is forwarded to the grading plant’s feeding table, and the sticks fall from between the layers onto a stick

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Drying of sawn timber

Drying of sawn timber After sawing, timber must be dried to reach the moisture content required for each purpose of use. The drying grades applied to sawn timber are shipping dry and carpenter dry. The moisture content of shipping-dry timber must be 18–24 %, while that of carpenter-dry timber must be 8–14 %. When drying

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Saw machines and sawing lines

Saw machines and sawing lines Sawing is a process that consists of long streamlined production lines and interim storage phases. This article presents the first part of the sawing process, ranging from log sorting to green sorting of sawn timber. Log sorting and measuring Logs are received at a sawmill on a log sorting line,

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By-products of the sawmill industry

By-products of the sawmill industry The sawing process produces various by-products that are financially significant for the sawmill industry. Sawn timber accounts for roughly half of the volume of a single log. The other half consists of by-products. Wood chips, sawdust and bark all have their own uses. Sawn timber accounts for roughly 80 %

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Manufacturing process of sawn timber – from logs to sawn goods

Manufacturing process of sawn timber – from logs to sawn goods The sawing process starts at the log sorting line, where logs are received and sorted. After debarking, logs are fed onto a sawing line. Bark is forwarded to a thermal power plant, and any residues are sold.   The sawing line consists of several

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Strength grading of sawn timber

Strength grading of sawn timber In addition to grading sawn timber on the basis of its visual quality, sawn goods to be used in construction must also be strength-graded. Strength grading means that the strength of sawn timber is determined on the basis of grading rules. Grading rules present minimum requirements for strength and elasticity

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Further-processed timber

Further-processed timber The further processing of sawmill industry products usually takes place at a sawmill or, according to the current trend, in companies specialising in further processing. Primary further-processed products include: Planed and painted timber Finger-jointed timber and components Glulam beams and panels CLT Logs Structures with nail plates Thermally modified timber Impregnated timber. These

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Other applications of sawn timber

Other applications of sawn timber As a material with multiple uses, sawn timber has numerous applications alongside construction and interior design. This article describes industrial applications. In addition, sawn timber is used extensively in DIY woodworking and construction, as well as handicrafts.   The packaging industry manufactures pallets, cable drums and boxes, largely from sawn

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