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Parameter, attribute, defect of wood, its arrangement









coniferous species (under the specification of the buyer)


Nominal length, m: for domestic market and export

from 1,0 up to 6,5 with gradation 0,25

for manufacturing container

from 0,5 with gradation 0,1




from 0,9 up to 6,3 with gradation 0,3


Deviations from nominal length, mm



Deviations from nominal thickness and width, mm, at the nominal sizes: up to 32 mm inclusive


from 40 up to 100 mm inclusive





The least face width of unedged sawn timber, mm, at nominal thickness: from 16 up to 50 mm






The note 1: The sizes of sawn timber on thickness and width are established for moisture content of 20%. At the greater or smaller moistness the sizes should be more or less on size of shrinkage in accordance with GOST 6782.175.


Sound intergrown knots: diameter in percentage of thickness/ number for 1 m length, pieces: face knots and arris knots






edge knots: at thickness up to 40 mm






25 (but no more than 15 mm) / 2





Partly intergrown knots and dead knots, diameter in percentage of width / number on 1 m length (in the sum with intergrown knots), pieces: face knots and arris knots






edge knots: at thickness up to 40 mm















diameter  on standards for intergrown and dead knots, number  no more than half from their allowed quantity

The note 2: Diameter of a knot is measured on distance between two straight linees concerning a knot, parallel to a longitudinal axis of sawn timber. The note 3: Knots with diameter less from 50% from permitted value are not taken into account. The note 4: The stepson are normalized as dead knot, in the perfect grade stepson is not allowed. The note 5: One knot with diameter on sizes of adjacent lower grade in sawn timber with length more than 3 m is allowed. The note 6: On the area of length, that is equal to width of sawn timber, the sum of the sizes of knots on the direct line crossing this area in any direction, should not exceed the permitted diameter of a knot. The note 7: Spike knots and twoedges arris knots with with the size on a small axis up to 6 mm and depth up to 3 mm in sawn timber more than 40 mm (except for a perfect grade) are allowed The note 8: The number of knots is not standardized for cants (thickness and width of 100 mm and more).


Face and edge cracks, including cracks, extended on the end, length, percentage of length of sawn timber: shallow (with deep less 5mm or less 1/10 of thickness for sawn timber with thickness more than 50mm)






deep (with deep more than 5mm or more 1/10 of thickness for sawn timber with thickness more than 50mm)






Face through cracks, including extending on the end: length, mm






length, percentage of length of sawn timber







End shakes (except for cracks from shrinkage (checks)), length, percentage of width of sawn timber







The note 9: The permitted sizes of cracks are specified for sawn timber with moisture content of 22%. At the greater moisture these sizes have to been reduced twice.






Compression wood, percentage from the face area of sawn timber





Gum pockets: number for on 1 m length of sawn timber, pieces





gum pocket length (on one side of sawn timber), mm




The pith and a double pith



without ring shakes and radial cracks in sawn timber with thickness of 40 mm and more




Bark pocket (onesided): width, percentage of width of sawn timber






length, percentage of length of sawn timber





Cancer, length, percentage of length of sawn timber






Fungus heartwood stains, the area, percentage from the area of face of sawn timber









deep blue, the area, percentage from the area of sawn timber








Motley heartwood rot as spots and strips, the area, percentage from the area of sawn timber




Wormholes, number of holes for 1 m length of sawn timber, pieces

not allowed (except for shallow on wane part)





Foreign bodies and impurities



Sharp wane, width of unsawed face in percentage to the width of sawn timber



width of unsawed edge in the percentage of the length of sawn timber



Rough wane: on faces and edges without limitation on length, the size of unsawed part in percentage of width






the size of unsawed part on separate sections of edges in the percentage of width





length of the section in percentage of length of sawn timber






Butt trimming, percentage of width or thickness of sawn timber







Tooth marks, snaking, shears, depth, mm

no more than deviations from nominal thickness or width




Bow, spring and twist, height of curvature in percentage of width of sawn timber







Cup, height of curvature in percentage of width of sawn timber






The note 10: Norms on warp are established for sawn timber with moisture of 22%. At the greater moisture the norms have to be reduced twice. The note 11: The defects of the wood which has been not mentioned in the table are allowed. The note 12: Sawn timber are delivered dry (moisture no more than 22%), natural dry or antiseptized natural dry. The note 13: The quality rating of sawn timber should be made on the worst face and worst edge.
