LiS Ltd.

About LiS Ltd. Offer & Pricing Round Timber Sawn Timber

Ukrainian state standards of sawn timber

Sawn timber of hardwoods. Specifications

Sawn timber of softwoods. Specifications

Measurements and acceptance of sawn timber. Specifications

The basic defects and their account

Veneer Transportation Contents

Quick Links:

oak sawn timber

beech sawn timber

softwoods lumber

construction timber
and sleepers

parquet flooring

flooring boards

industrial parquet

lamellas

sliced veneer

solid wood panels and glued beams

packaging timber,
pallets and firewood

 
 

quality control services

 

Last News:

Feb 2015
We are available at lisltd.biz domain

9 Apr 2015
Ukrainian Parliament prohibited export of round logs:
- all wood logs except pine starting from 1st Nov 2015
- pine logs starting from 1st Jan 2017

Please contact us to find a way to save your purchase programs


SAWN TIMBER OF HARDWOODS. SPECIFICATIONS.
Requirements in accordance with GOST 2695-83

# Parameter, attribute, defect of wood, its arrangement Requirements on grades
1 grade 2 grade 3 grade
1 Species of wood hardwoods (deciduous, under the specification of the buyer)
2 Nominal length, m:
from hard-grained deciduous species
from 0,5 up to 6,5 with gradation 0,10
from soft deciduous species from 0,5 up to 2,0 with gradation 0,10
and from 2,0 up to 6,5 with gradation 0,25
3 Deviations from nominal thickness, mm from -25 up to +50
4 Nominal thickness, mm 19, 22, 25, 32, 40, 45, 50, 60, 70, 90, 100
5 Deviations from nominal thickness, mm,
at thickness up to 32 mm
from -1,0 up to + 1,0
at thickness more than 32 mm from -2,0 up to + 2,0
6 Nominal width, mm:
square edged sawn timber
60, 70, 80, 90, 100, 110, 130, 150, 180, 200
unedged and one-edge square edged sawn timber 50 and more with gradation 10
7 Deviations from nominal width square edged sawn timber, mm, at width up to 100 mm from -2,0 up to +2,0
at width more than 100 mm from -3,0 up to +3,0
8 The least face width of  of unedged sawn timber, mm

40

9 Sound intergrown knots, the size of not taken into account knots, except for group knots, mm 10 20 50
the permitted size of knots (the sum of the sizes of knots), mm / number for 1 m length:
on faces at width up to 100 mm
20/1 50 (but no more than 50 % of width)/2 (300)/allowed
at width from 100 up to 200 mm 20/2 50/3 (300)/allowed
at width from 210 up to 400 mm 40/2 50/3 (300)/allowed
at width over 400 mm 40/2 or 60/1 50/3 or 70/2 (300)/allowed
on edges of square edged sawn timber, the size in percentage of thickness, number of knots, at thickness:
up to 32 mm
33/1 50/1 allowed
from 40 up to 60 mm 33/2 50/2 allowed
10 Partly intergrown sound knots and dead sound knots, the size of not taken into account knots (except for group knots), mm - 15 30
on faces 20 (in the general number of intergrown  knots) 40 (in the general number of intergrown knots) (150)
on edges of square edged sawn timber according to standards for intergrown knots (150)
11 Loos knots, rotten and unsound knots, the size of not taken into account knots (except for group knots), mm not allowed 10 25
the numerator - the permitted size of knots (the sum of the sizes of knots), mm, the denominator - quantity for 1 m length:
on faces
not allowed 40/1 (150)
on edges of square edged sawn timber not allowed according to standards for intergrown sound knots
12 Face cracks and edge cracks (on square edged edges), including extended on the end: depth, percentage of thickness and length of sawn timber 16 33 50
13 Face cracks, extended on both ends, depth, percentage of thickness of sawn timber not allowed 20 30
quantity of cracks, pieces not allowed 1 1

in beech sawn timber with width more than 200 mm the depth of crack have no limit

14 Face and edge through cracks, including extending on the end, length, percentage of length of sawn timber 5 10 33
15 Ring shakes, length, percentage of length of sawn timber not allowed 5 20
16 Face cracks, depth, percentage of width of sawn timber 75 100 allowed
17 Slant of fibres, % 5 10 allowed
18 Curly grain, the area, percentage from the area of sawn timber's face 25 allowed
19 Bark pocket, length and width, percentage of length and width of sawn timber:
one-sided
5 10 allowed
through not allowed 10 allowed
20 Included sapwood not allowed allowed
21 Fungus heartwood stains and strips, the area, percentage from the area of face of sawn timber not allowed 10 allowed
22 Brown streak, the area, percentage from the area of face of sawn timber not allowed 5 15
23 Mould, surface blue stain, strips - are allowed. allowed
24 Deep blue, the area, percentage from the area of sawn timber's face not allowed 10 20
25 Heartwood rot and sapwood rot, the area, percentage from the area of sawn timber' face:
uneedged sawn timber
not allowed 5 10
square edged sawn timber not allowed 5
26 Hearwood and sapwood fungus brown rot not allowed
27 Wormholes, quantity of holes for 1 m length of sawn timber are not allowed, except for surface wormholes on wane (with depth not more 3mm) 3;
large - 1 piece
5
in oak sawn timber deep wormholes - are not allowed
28 Mechanical damages and defects of processing are allowed within the limits of a deviation from the standard sizes allowed
29 Foreign bodies and impurities not allowed
30 Butt trimming, percentage of thickness or width of sawn timber 5 5 5
31 Rough wane, the size of not sawed part, percentage of thickness or width of sawn timber 20 33 50
32 Sharp wane, percentage of length of sawn timber not allowed 25 50
33 Bow, spring and twist, percentage from length of sawn timber 0,5 1,0 2,0
34 Cup, percentage from width of sawn timber 1,0 2,0 3,0
35 Parameter of the roughness, Rm max, micrometer 1250
36 Sapwood in square edged oak sawn timber:
the size, percentage from width
50 allowed
the size, percentage from length 33 50 allowed

The note 1: The sizes of sawn timber on thickness and on 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 6782.2-75.
The note 2: The defects of the wood which has been not mentioned in the table, are allowed.
The note 3: On edges of square edged sawn timber over 60 mm defects of wood are allowed by thickness on the norms specified for a face.
The note 4: At moisture content of wood more 22% the sizes of permitted cracks, bow, spring, cup and twist are decreased twofold.
The note 5: Spring in unedged sawn timber it is not standardized.
The note 6: The quality rating of quality of sawn timber should be made on the worst face and worst edge.
The note 7: Sawn timber of third grade in length more than 3 m, on 50% which of length of grade-making defects are not present, or there are only knots, not taken into account in standards of 1 grade, or on 67% of lenth of which are defects in norms of 1 grade, are related to 2 grade.
The note 8: The presence of one knot with the sizes permitted for adjacent lower grade in sawn timber with length over 3 m is allowed.
The note 9: Non-parallelity of faces and edges is allowed within the limits of deviations from nominal thickness or width.
The note 10: Sawn timber are delivered dry (with moistness no more than 22%), natural dry or antiseptized.

Go to the top of page
 © 1998-2017 Copyright LiS Ltd.

http://lisltd.biz           http://wood.appua.com