Why wood?
29.7.2020

Quality classes, names and dimensions

Sawn timber is categorised into the following classes based on quality properties: The main qualities are US, V, VI and... Sawn timber is categorised into the following classes based on quality properties: The main qualities are US, V, VI and VII. A is the highest quality class and contains qualities US II – US IV of the share of production. The V and VI qualities are not divided into sub-qualities. VII is the lowest quality …

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29.7.2020

Standard sizes: thicknesses, widths and lengths

Dimensions mean nominal sizes with the moisture content of the sawn timber at 20%. The most common lengths vary between... Dimensions mean nominal sizes with the moisture content of the sawn timber at 20%. The most common lengths vary between 2.7 m and 5.4 m in steps of 300 mm. Other lengths and modules must be agreed separately. Thickness and width dimensions mean the nominal sizes of the timber at a moisture content of 20%. …

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29.7.2020

Drying

Sawn timber is usually artificially dried at least to a level acceptable for shipping. In that case, at least 97% of the... Sawn timber is usually artificially dried at least to a level acceptable for shipping. In that case, at least 97% of the pieces in a batch of sawn timber has a moisture content of no more than 24%. Moisture content requirements that deviate from this must be specially mentioned in the contract/order confirmation. By agreement, …

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30.7.2020

Permitted dimensional deviations

The maximum permitted dimensional deviations from nominal sizes for sawn timber are shown in the following tables:

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30.7.2020

Sorting sawn timber in terms of strength

Most sawn timber is sorted using modern, highly developed, mechanical strength sorting methods, such as computer-vision... Most sawn timber is sorted using modern, highly developed, mechanical strength sorting methods, such as computer-vision measurement, measurement of specific frequency, X-ray measurement and ultrasound measurement. The traditional mechanical strength sorting method is to bend the pieces of sawn timber, based on which the modulus of elasticity can be established and thereby the strength class &helli

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30.7.2020

Marking sawn timber in terms of strength

Each piece of sawn timber sorted according to strength is stamped. Usually the information required on the stamp is prin... Each piece of sawn timber sorted according to strength is stamped. Usually the information required on the stamp is printed as continuous text on the face of the piece of timber. Alternatively, an individual stamp can be used that shows the necessary information. The manufacture of the sawn timber can also put its own markings …

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30.7.2020

Most common uses for quality classes of sawn timber

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