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Feb 2015
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ROUND TIMBER HARDWOODS.
Requirements in accordance with GOST 9462-88
SAW LOG HARDWOODS GENERAL PURPOSE
Requirements in accordance with GOST 9462-88
| ¹ |
Parameter, attribute |
The requirement |
| 1 grade |
2 grade |
3 grade |
| 1 |
Breed of wood |
all species |
| 2 |
Nominal length, m:
oak, beech, ash, elm, maple, hornbeam |
from 1,0 up to 6,0 with gradation 0,1 |
| other species |
from 2,0 up to 6,0 with gradation 0,25 |
| 3 |
Deviations from nominal length, m:
at length 1,0 - 1,9 m |
from +0,03 up to +0,05 |
| 2,0 m and more |
from +0,03 up to +0,10 |
| 4 |
Least diameter of a log, cm |
14 (for processing on milling-sawing machine tools -
12) |
| 5 |
Diameter of the greatest knot and the stepson, cm |
3 |
10 |
allowed |
| 6 |
Diameter of a tobacco knot, cm |
not allowed |
4 |
7 |
| 7 |
Thickness of a cutting heartwood rot and hollow heart,
shares of diameter of a butt-end:
at diameter of a butt-end up to 24 cm |
0,10 |
0,25 |
0,33 |
| (on one of butt-ends) |
| 26 - 38 cm |
0,25 |
0,33 |
0,33; at length up to 3 m - 0,50, at the second
butt-end - 0,25 |
| (on one of butt-ends) |
| 40 cm and more |
0,33 |
0,50 |
0,50, at the second butt-end - 0,25 |
| (on one of butt-ends) |
| 8 |
Brown streak |
not allowed |
allowed without white spots and efflorescences |
allowed |
| 9 |
Depth of sapwood rot, shares of diameter of a butt-end |
not allowed |
0,10 |
0,10 |
| 10 |
External mouldering rot |
not allowed |
| 11 |
Thickness of a cutting of fissures (except for checks from shrinkage), shares of
diameter of a butt-end |
0,33 |
0,33 |
allowed |
| 12 |
Depth of lateral cracks from shrinkage, shares of diameter of a butt-end |
0,05 |
0,20 |
0,20 |
| 13 |
Length of end shakes from shrinkage |
no more an allowance on length |
no more than diameter of the top butt-end |
| 14 |
Wormhole |
not allowed |
allowed |
| 15 |
Height of sweep, interests percentage of the length of a log:
simple |
1,0 |
1,5 |
2,0 |
| complex |
0,5 |
0,75 |
1,0 |
| 16 |
Depth of the mechanical damages, open bark pocket, scar and canker, cm |
the sum of the top end face of 0,1 diameters and
half-difference diameters in a place of damage and to the top end face |
allowed |
| 17 |
Thickness of a cutting of mechanical damages, bark pockets, scars, cheks from
shrinkage, shares of diameter of a log |
0,33 |
0,50 |
allowed |
| 18 |
Height of knots (from a bark), cm |
2 |
2 |
2 |
| 19 |
Butt trimming |
not more than allowance on length |
| 20 |
Volume of defective logs in a party(set) (not appropriate to requirements on item
1-19), % |
3,0 |
| 21 |
Parity(ratio) of the prices on birch saw log and the saw logs of others soft foliferous
species (length 2,0 - 6,0 m) |
100 (the basic price) |
77 |
65 |
| 22 |
Parity(ratio) of the prices on hardwood saw log species (length 3,0 - 4,0, diameter
25 - 44 cm):
oak, ash, elm |
100 (the basic price) |
81 |
72 |
| beech |
76 |
63 |
54 |
| 23 |
Correction factor to the basic price of logs of hardwood
species of the various sizes |
nominal length of logs, m |
| 1,0 - 2,9 |
3,0 - 4,0 |
4,1 - 6,0 |
| Diameter of logs up to 24 cm incl. |
0,76 |
0,91 |
1,13 |
| 26 - 44 cm |
0,82 |
1,00 |
1,23 |
| 46 cm and more |
0,88 |
1,09 |
1,34 |
| 24 |
The price of defective logs, at volume of defective logs in a party(set) (sample):
up to 3,0 % |
it is equal to the price of suitable logs
of the 3 grade on item 21 |
| 3,1 % and more |
45 % from the basic price |
| 25 |
Factor of switch of the piled volume of logs with a bark in
dense volume without a bark (on OST 13-43-79) |
at nominal length of logs, m |
| 3,0 - 3,9 |
4,0 - 5,5 |
5,6 - 6,5 |
| trams without a hat, automobiles |
0,64 |
0,59 |
0,57 |
trams with a hat:
zone dimension |
0,63 |
0,58 |
0,58 |
| usual dimension |
0,60 |
0,55 |
0,54 |
SKI LOG HARDWOODS
Requirements in accordance with GOST 9462-88
| ¹ |
Parameter, attribute |
The requirement
1 grade |
| 1 |
Breed of wood |
birch, maple, hornbeam, èëüì, a beech, an ash |
| 2 |
Nominal length, m:
birch |
1,5 |
| birch, maple, elm, beech, ash, hornbeam |
from 2,0 up to 2,4 with gradation 0,10 |
| 3 |
Deviations (rejections) from nominal length, m:
at length of 1,5 m |
from +0,03 up to +0,05 |
| from 2,0 up to 2,4 |
from +0,03 up to +0,10 |
| 4 |
Least diameter of a log, cm |
16 |
| 5 |
Diameter of the greatest knot and the stepson, cm |
3 |
| 6 |
Tobacco knots |
not allowed |
| 7 |
Thickness of a cutting of kernel decays and hollow, shares of diameter of a butt-end
(at both a butt-ends) |
0,33 |
| 8 |
Brown streak, sapwood rot, external mouldering decay, a wormhole (except surfaces) |
not allowed |
| 9 |
Thickness of a cutting of a false kernel, share of diameter of a butt-end
at diameter of a butt-end up to 26 cm |
0,5 |
| 26 cm and more |
0,6 |
| 10 |
Thickness of a cutting of cracks (except for cracks from shrinkage), shares of
diameter of a butt-end |
0,33 |
| 11 |
Depth of lateral cracks from shrinkage, shares of diameter of a butt-end |
0,05 |
| 12 |
Depth of face cracks from shrinkage |
not more than allowance on length |
| 13 |
Height of sweep, percentage from length of a log:
simple |
1,0 |
| at diameter of a log up to 24 cm |
1,0 |
| 26 cm and more |
2,0 |
| complex |
allowed at a rate of half of norm of simple sweep |
| 14 |
Depth of mechanical damages of bark pocket, scar and a canker |
the sum of the top butt-end of 0,1 diameters and half-difference
diameters in a place of damage and at the top butt-end |
| 15 |
Thickness of a cutting of mechanical damages, bark pocket, scars, cracks from
shrinkage, a share of diameter of a log |
0,33 |
| 16 |
Height of knots (from bark), cm |
2 |
| 17 |
Butt trimming |
not more than allowance on length |
VENEER LOG HARDWOODS (FOR PEELING)
Requirements in accordance with GOST 9462-88
| ¹ |
Parameter, attribute |
The requirement |
| 1 grade |
2 grade |
| 1 |
Breed of wood |
oak, maple, ash, birch, poplar, elm, beech, hornbeam,
alder, aspen, linden |
| 2 |
Nominal length, m |
1,3; 1,6; 1,91; 2,23; 2,54 and multiple to them |
| 3 |
Deviations(rejections) from nominal length, m:
blocks |
from +0,02 up to +0,05 |
| long pole from 2 blocks |
from +0,04 up to +0,15 |
| long pole from 3 blocks |
from +0.06 up to +0,20 |
| long pole from 4 blocks |
from +0.08 up to +0,25 |
| 4 |
Least diameter of a log, cm:
at length 1,3 and 1,6 |
16 |
16 |
| at the greater length |
18 |
18 |
| 5 |
Diameter of the greatest knot and the stepson, cm |
3 |
7 |
| 6 |
Diameter of a tobacco knot, cm |
not allowed |
4 |
| 7 |
The greatest thickness of a cutting of kernel decays and hollow, cm |
10 |
10 |
| 8 |
External mouldering decay, lateral cracks from shrinkage |
not allowed |
| 9 |
Brown streak |
not allowed |
allowed without white spots and efflorescences |
| 10 |
Depth of sapwood rot, shares of diameter of a butt-end |
not allowed |
0,10 |
| 11 |
Wormhole superficial and deep |
not allowed |
allowed |
| 12 |
Height of sweep, percentage from length of a log:
simple at diameter of a log, cm:
16 - 18 |
1,0 |
1,0 |
| 20-24 |
1,0 |
2,0 |
| 26 and more |
2,0 |
3,0 |
| complex |
allowed at a rate of half of norm of simple sweep |
| 13 |
The least depth of a zone peeling (without bark pocket, scar, canker, cracks,
mechanical damages) in any part of radius at a butt-end of a log (but 4 cm from the centre
and not closer), cm |
5 |
4 |
| 14 |
The least angle between kerbs of tendrilsof the grown-in knots at birch logs, degree |
120 |
allowed |
| 15 |
The least ratio of cross diameter of a wound stain from grown-in knots to longitudinal
(not less):
beech, hornbeam, linden, alder, aspen, poplar |
2:1 |
allowed |
| oak, maple, ash |
3:1 |
allowed |
| 16 |
Height of knots (from bark), cm |
2 |
PLANING LOG HARDWOODS
Requirements in accordance with GOST 9462-88
| ¹ |
Parameter, attribute |
The requirement |
| 1 grade |
2 grade |
| 1 |
Breed of wood |
all hardwoods |
| 2 |
Nominal length, m |
from 1,5 with gradation 0,1 |
| 3 |
Deviations from nominal length, m:
at length 1,5 - 1,9 m |
from +0,03 up to +0,05 |
| 2,0 m and more |
from +0,03 up to +0,10 |
| 4 |
Least diameter of a log, cm |
24 |
| 5 |
Diameter of the greatest knot and the stepson, cm |
3 |
10 |
| 6 |
Diameter of a tobacco knot, cm |
not allowed |
4 |
| 7 |
Thickness of a cutting of kernel decays andhollow (on one of butt-ends), shares of
diameter of a butt-end:
At diameter of a butt-end of 24 cm |
0,10 |
0,25 |
| 26 - 38 cm |
0,25 |
0,33 |
| 40 cm and more |
0,33 |
0,50 |
| 8 |
Brown streak |
not allowed |
allowed without white spots and efflorescences |
| 9 |
Depth of sapwood rot, shares of diameter of a butt-end |
not allowed |
0,10 |
| 10 |
External mouldering decay |
not allowed |
| 11 |
Thickness of a cutting of cracks (except for cracks from shrinkage), shares of
diameter of a butt-end |
0,33 |
0,33 |
| 12 |
Depth of lateral cracks from shrinkage, shares of diameter of a butt-end |
0,05 |
0,20 |
| 13 |
Length of face cracks from shrinkage |
not more than allowance on length |
not more than diameter of the top butt-end |
| 14 |
Wormhole |
not allowed |
allowed |
| 15 |
Height of sweep, percentage from length of a log:
simple |
1,0 |
1,5 |
| complex |
0,5 |
0,75 |
| 16 |
Depth of the mechanical damages, open bark pocket, scar and canker, cm |
the sum of the top end face of 0,1 diameters and
half-difference diameters in a place of damage and to the top end face |
| 17 |
Thickness of a cutting of mechanical damages, bark pocket, scar and canker, cm |
0,33 |
0,50 |
| 18 |
Height of knots (from bark), cm |
2 |
| 19 |
Butt trimming |
not more than allowance on length |
MATCH LOG HARDWOODS
Requirements in accordance with GOST 9462-88
| ¹ |
Parameter, attribute |
The requirement |
| 1 grade |
2 grade |
| 1 |
Breed of wood |
aspen, poplar, linden, alder |
| 2 |
Nominal length, m |
2,0 and more with gradation 0,1 |
| 3 |
Deviations from nominal length, m |
from +0,03 up to +0,10 |
| 4 |
Least diameter of a log, cm |
16 |
| 5 |
Diameter of the greatest knot and the stepson, cm |
3 |
7 |
| 6 |
Diameter of a tobacco knot, cm |
not allowed |
4 |
| 7 |
Thickness of a cutting kernel decays and hollow, shares of diameter of a butt-end (on
one of butt-ends):
at diameter of a butt-end up to 24 cm |
0,10 |
0,25 |
| 26 - 38 cm |
0,25 |
0,33 |
| 40 cm and more |
0,33 |
0,50 |
| 8 |
Brown streak |
not allowed |
allowed without white spots and efflorescences |
| 9 |
Depth of sapwood rot, shares of diameter of a butt-end |
not allowed |
0,10 |
| 10 |
External mouldering decay |
not allowed |
| 11 |
Thickness of a cutting of cracks (except for checks from shrinkage), shares of
diameter of a butt-end |
0,33 |
0,50 |
| 12 |
Depth of lateral cracks from shrinkage, shares of diameter of a butt-end |
0,05 |
0,20 |
| 13 |
Length of face end shakes from shrinkage |
not more than allowance on length |
not more than diameter of the top butt-end |
| 14 |
Wormhole (deep and superficial) |
not allowed |
allowed |
| 15 |
Height of sweep, percentage from length of a log:
simple:
at diameter of a log up to 24 cm |
1,0 |
2,0 |
| 26 cm and more |
2,0 |
3,0 |
| complex |
allowed at a rate of half of norm of simple sweep |
| 16 |
Depth of the mechanical damages, open bark pocket, scar and canker,
cm |
the sum of the top butt-end of 0,1 diameters and
half-difference of diameters of a log in a place of damage and on the top butt-end |
| 17 |
Height of knots (from bark), cm |
2 |
| 18 |
Butt trimming |
not more than allowance on length |
CONSTRUCTION LOG HARDWOODS
Requirements in accordance with GOST 9462-88
| ¹ |
Parameter, attribute |
The requirement
2 grade |
| 1 |
Breed of wood |
all hardwoods |
| 2 |
Nominal length, m |
from 4,0 up to 6,5 with gradation 0,5 |
| 3 |
Deviations from nominal length, m |
from +0,03 up to +0,10 |
| 4 |
Least diameter, cm |
from 12 up to 24 |
| 5 |
Diameter of the greatest knot or the stepson, cm |
7 |
| 6 |
Heartwood, external mouldering rot and tobacco knots |
not allowed |
| 7 |
Brown streak |
allowed without white spots and efflorescences |
| 8 |
Depth of sapwood rot, shares of diameter of a butt-end |
0,1 |
| 9 |
Thickness of a cutting of cracks (except for checks from
shrinkage), shares of diameter of an end face |
0,50 |
| 10 |
Depth of lateral cracks from shrinkage, shares of diameter of
a butt-end |
0,2 |
| 11 |
Length of face cracks from shrinkage |
not more than diameter of the top butt-end |
| 12 |
Height of sweep, percentage from length of a log:
simple |
2 |
| complex |
1 |
| 13 |
Depth of mechanical damages open bark pocket, scar and
canker, cm |
the sum of the top end face of 0,1 diameters and
half-difference of diameters in a place of damage and on the top butt-end |
| 14 |
Height of knots (from bark), cm |
2 |
| 15 |
Butt trimming |
not more than allowance on length |
|
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