GOST 8486 86 sawn softwood. GOST: coniferous lumber, dimensions of boards. Acceptance rules and control methods

INTERSTATE STANDARD

Introduction date 01.01.88

This standard applies to sawn softwood and specifies technical requirements to lumber intended for use in the national economy and for export.

The standard does not apply to resonant and aviation lumber.

1. MAIN PARAMETERS AND DIMENSIONS

1.1. Lumber is divided into edged, unedged, boards, bars and beams.

Terms and definitions - according to GOST 18288.

1.2. Nominal sizes of lumber and limit deviations from nominal dimensions - according to GOST 24454.

By agreement with the consumer, lumber is allowed for the domestic market with a gradation in length, dimensions and tolerances established in GOST 9302 and GOST 26002.

(Revised edition, Rev. No. 2).

1.3. Symbol should consist of the name of the lumber (board, bar, beam), the number indicating the grade, the name of the wood species (coniferous or individual species - pine, spruce, larch, cedar, fir), the digital designation of the cross section (for unedged lumber - thickness) and the symbols of this standard.

Symbol examples:

Board - 2 - pine - 32x100 - GOST 8486-86

Board - 2 min. - 32 - GOST 8486-86

2. TECHNICAL REQUIREMENTS

2.1. Lumber must comply with the requirements of this standard and be made from wood of the following species: pine, spruce, fir, larch and cedar.

2.2. According to the quality of wood and processing, boards and bars are divided into five grades (selective, 1, 2, 3, 4th), and the bars are divided into four grades (1, 2, 3, 4th) and must meet the requirements specified in table. The purpose of lumber of various grades is given in the mandatory appendix.

2.3. Lumber of selected, 1, 2, 3 grades is made dry (with a moisture content of not more than 22%), raw (with a moisture content of more than 22%) and raw antiseptic. In the period from May 1 to October 1, the production of raw antiseptic and raw lumber is allowed by agreement with the consumer (customer).

Humidity of lumber of the 4th grade is not standardized.

Antiseptic - according to GOST 10950.

2.4. The assessment of the quality of sawn timber, with the exception of deck timber, should be made according to the worst face or edge for a given board, and square bars and beams - according to the worst side.

2.5. The surface roughness parameter of lumber Rm max should not exceed 1250 microns for selected, 1, 2 and 3 grades, and for grade 4 - 1600 microns according to GOST 7016.

2.4; 2.5. (Revised edition, Rev. No. 3).

2.6. The non-parallelism of the layers and edges in edged lumber, as well as layers in unedged lumber, is allowed within the limits of deviations from the nominal dimensions established by GOST 24454.

2.7. Additional requirements to lumber intended for special shipbuilding

2.7.1. Lumber for sheathing parts and connections of sea boats, boats of seagoing vessels, gliders, high-speed lake and river boats and sports vessels of the 1st class must meet the requirements of the selected grade with the following additions:

the core part in the middle of the length of the lumber should be on the inner face: in the longitudinal sheathing - at least 50%, in the diagonal - at least 25% of the width of the face;

the sizes of intergrown, partially intergrown and non-united knots taken into account should not exceed 10 mm;

the number of considered intergrown knots should not exceed 1 pc. on any one-meter section of the length of the lumber, and partially fused, not fused - 1 pc. for 2 m of lumber length;

counted knots are allowed no closer than 10 mm from the edges of the lumber;

pockets on the outer face of lumber are not allowed.

2.7.2. Sawn timber for decking of marine vessels shall comply with the requirements of premium and first grades for exterior decks and first and second grades for interior decks with the following additions:

on the best layers of lumber up to 100 mm wide inclusive, intended for external decks, the sapwood part is allowed no more than 30 mm wide, and the surfaces of the layers must be radial or close to it sawing (without wedge cuts of annual layers);

considered knots are allowed: intergrown - not closer than 10 mm, partially intergrown and not intergrown - not closer than 15 mm from the edges of the outer layer;

on the worst face and lower halves of the edge area of the lumber, intergrown knots are allowed without restriction, and partially intergrown and unjoined - up to 1/3 of the width of the face;

cracks are allowed in lumber for external decks up to a depth of ¼ thickness; for internal decks - 1/3 lumber thickness. Cracks in deck lumber are not limited in length;

blunt wane is allowed in deck lumber with a size of not more than 5 mm;

cancer on the best faces and upper halves of the edge area, and pockets on the best face of lumber for outdoor decks are not allowed;

core within the bottom half of the deck lumber is allowed.

Note. The assessment of the quality of deck lumber is carried out by the best layer and the upper halves of the edge area.

(Revised edition, Rev. No. 1).

2.8. Sawn timber should be sorted by type of processing into edged and unedged, by size and grade (each grade separately).

At the request of the consumer, lumber can be sorted into groups of grades in accordance with the destinations established in the mandatory annex to the standard.

Lumber for export must be sorted in accordance with the work order of the foreign trade organization.

2.9. The grade, nature of processing, dimensions and species of wood must be indicated in the customer's specification.

Rules for limiting vices

selected

1. Knots

Allowed in size in fractions of the width of the side and in quantity on any one-meter section of length on each side, no more than:

1.1. Adhered healthy, and in the bars and partially accreted and uncombined healthy:

plastic and rib

Allowed

edging: on lumber up to 40 mm thick

40 mm thick or more

Note. In bars, the number of knots is not standardized.

1.2. Partially fused and not fused

Allowed in the total number of intergrown sound knots in size in fractions of the width of the side and in quantity on any one-meter length section on each side, not more than:

plastic and rib

Decayed

edging: on lumber up to 40 mm thick

40 mm thick or more

1.3. Decayed, rotten and tobacco

not allowed

Allowed in the total number of partially fused and unjoined healthy knots of the same size and not more than half of their number.

Wood surrounding tobacco knots should not show signs of rot.

Notes:

1. Knots less than half of the maximum allowable are not taken into account.

2. In sawn timber with a thickness of 40 mm or more (with the exception of the selected grade), oblong and sewn knots are allowed with a size along the minor axis up to 6 mm and a depth of up to 3 mm without limiting the size along the major axis.

3. A stepson is allowed according to the norms of non-united knots. Not allowed in selected grade

4. The size of the knot is determined by the distance between the tangents to the contour of the knot, drawn parallel to the longitudinal axis of the lumber. For the size of an oblong and stitched knot on the faces of the lumber and on all sides of the bars and bars, take half the distance between the tangents drawn parallel to the longitudinal axis of the lumber.

5. In sawn timber with a length of more than 3 m, it is allowed to have one knot in the size provided for in the norms of the adjacent lower grade.

6. On a section of lumber with a length equal to its width, the largest sum of the sizes of knots lying on a straight line intersecting the knots in any direction should not exceed the maximum size of permissible knots.

Norms for limiting defects in sawn timber for grades

selected

2. Cracks

In lumber for load-bearing structures, the sum of the sizes of all knots located on a section 200 mm long should not exceed the maximum size of permissible knots.

2.1. Plastic and edging, including facing to the end

Allowed length in fractions of lumber length, not more than

shallow shallow and deep

integrity

lumber

deep

2.2. Plastic through, including facing to the end

Allowed length in mm, not more than:

Allowed total length in fractions of lumber length, not more than

2.3. End (except shrinkage cracks)

Not allowed

Allowed at one end with a length in fractions of the width of the lumber, not more than:

Allowed subject to retention

lumber integrity

Note. Permissible crack sizes are set for lumber with a wood moisture content of not more than 22%, with a higher moisture content, these crack sizes are halved.

3. Defects in the structure of wood

3.1 Tilt of fibers

Allowed no more than 5%

Allowed

Not allowed

No more than 20% of the area is allowed

layer of lumber

Allowed

3.3. pockets

Allowed one-sided

any one-meter section of length in

quantity 1 pc. length no more than 50 mm

Allowed on any one-meter section of lumber length in pieces, not more than:

Allowed

3.4. Core and double core

Not allowed

Allowed without peeling and radial cracks only in lumber with a thickness of 40 mm or more

Allowed

3.5. Prorost

Not allowed

One-sided width is allowed in fractions of the corresponding side of the sawn timber, not more than:

Allowed

and length in shares of lumber length, not more than:

Not allowed

It is allowed to extend in fractions of the length of the lumber up to

Allowed

1/5, but not more than 1 m

4. Fungal lesions

4.1. Mushroom poisonous spots (stripes)

Not allowed

Allowed by the total area in % of the lumber area, not more than:

Allowed

4.2. Sapwood fungus stains and mold

Not allowed

Superficial in the form of spots and stripes are allowed. Deep ones are allowed with a total area in% of the lumber area, not more than:

Allowed

Not allowed

Only variegated sieve heartwood rot is allowed in the form of spots and stripes with a total area of not more than 10% of the lumber area

5. Biological damage

5.1. Worm-hole

Allowed shallow on wane parts of lumber

Allowed on any one-meter section of lumber length in pieces, not more than:

6. Foreign inclusions, mechanical damage and processing defects

6.1. Foreign inclusions (wire, nails, metal fragments, etc.)

Not allowed

6.2. Wane (in edged lumber)

Acute not allowed

Dull is allowed on faces and edges in proportions of the width of the corresponding sides of the lumber without length restrictions, not more than:

Blunt and sharp are allowed, provided that the plates are propylene not less than 1 / 2

width, but not edges

It is allowed on separate sections of the edges with dimensions in fractions of the edge width, not more than:

less than 3/4 length

lumber

and length in fractions of the length of lumber, not more than:

Notes:

1. Bark on the wane of export lumber is not allowed.

2. Edged sawn timber that meets the requirements of a certain grade in all respects, but with a wane that exceeds the established norm for this grade, is allowed to be converted into unedged timber with the grade preserved.

6.3 Bevel cut

In lumber, one end (in export lumber, both ends) must be sawn perpendicular to the longitudinal axis of the lumber. Deviation from the perpendicularity of the end to the face and edge is allowed up to 5% of the width and thickness of the lumber, respectively.

6.4. Risks, waviness, tear

Allowed within the limits of deviations from the nominal dimensions established in GOST 24454-80

Allowed with a depth of not more than 3 mm

Allowed

7. Warp

7.1. Warping is longitudinal along the face and edge, wingedness

Allowed deflection in fractions of the lumber length in%, not more than:

Allowed

Note. In unedged lumber, longitudinal warping along the edge is not standardized.

7.2. Warp transverse

Allowed deflection in fractions of the width of the lumber in%, not more than:

Allowed

Notes:

1. Warp rates are set for lumber with a moisture content of not more than 22%. With higher humidity, these norms are halved.

2. Wood defects not mentioned in this standard are allowed.

(Changed edition, Rev. No. 1, 3).

3. RULES OF ACCEPTANCE AND METHODS OF CONTROL

3.1. Acceptance rules and control methods - according to GOST 6564.

4. MARKING, TRANSPORT AND STORAGE

4.1. Marking, packaging and transportation of lumber should be carried out in accordance with GOST 6564 and GOST 19041.

Dimensions of transport packages - according to GOST 16369.

4.2. Sawn timber storage - according to GOST 3808.1 and GOST 19041.

APPLICATION

Mandatory

(groups of varieties)

lumber

The main purposes of lumber

Special shipbuilding - for sheathing and bracing of sea boats, boats, seagoing vessels, gliders, high-speed lake and river boats and sports vessels of the 1st class, decking of the outer and inner decks of sea vessels

Agricultural engineering - for the manufacture of wooden parts of agricultural machines

Carriage building - for the manufacture of wooden parts of cars railways

Shipbuilding

Automotive industry - for the manufacture of wooden parts for trucks, trailers and semi-trailers

Bridge building, wagon building

Construction and maintenance needs, elements of load-bearing structures, parts of windows and doors, planed parts, parts wooden houses and etc.

Manufacture of various woodworking products, including furniture, staves for jellied and dry barrels, special containers

Container and packaging

For use on low-responsibility parts in construction, cutting into small blanks for various purposes

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry of Forestry, Pulp and Paper and Woodworking Industry of the USSR

DEVELOPERS

P.F. Kuropteev, G.M. Vaskova

2. APPROVED AND INTRODUCED BY THE DECISION of the USSR State Committee for Standards dated September 30, 1986 No. 2933

3. The standard fully complies with ST SEV 2369-80

5. REFERENCE REGULATIONS AND TECHNICAL DOCUMENTS

6. The limitation of the validity period was removed according to the protocol No. 3-93 of the Interstate Council for Standardization, Metrology and Certification

7. REPUBLICATION with Amendments No. 1, 2, 3, approved in December 1987, in September 1988, February 1990 (IUS 3-88, 1-89, 5-90)

INTERSTATE STANDARD

SOFTENER SAWN

TECHNICAL CONDITIONS

Introduction date 01.01.88

This standard applies to sawn softwood and establishes technical requirements for sawn timber intended for use in the national economy and for export.

The standard does not apply to resonant and aviation lumber.

(Revised edition, Rev. No. 3).

1. MAIN PARAMETERS AND DIMENSIONS

1.1. Lumber is divided into edged, unedged, boards, bars and beams.

1.2. Nominal dimensions of sawn timber and maximum deviations from nominal dimensions - according to GOST 24454.

By agreement with the consumer, lumber is allowed for the domestic market with a gradation in length, dimensions and tolerances established in GOST 9302 and GOST 26002.

(Revised edition, Rev. No. 2).

1.3. The symbol should consist of the name of the lumber (board, bar, beam), the number indicating the grade, the name of the wood species (coniferous or individual species - pine, spruce, larch, cedar, fir), the digital designation of the cross section (for unedged lumber - thickness) and the designations of this standard.

Symbol examples:

Board- 2 - pine - 32 100- GOST 8486-86

Board - 2 min. - 32 - GOST 8486 -86

2. TECHNICAL REQUIREMENTS

2.1. Lumber must comply with the requirements of this standard and be made from wood of the following species: pine, spruce, fir, larch and cedar.

2.2. According to the quality of wood and processing, boards and bars are divided into five grades (selective, 1, 2, 3, 4th), and bars - into four grades (1, 2, 3, 4th) and must meet the requirements specified in table.

The purpose of lumber of various grades is given in the appendix.

(Changed edition, Rev. No. 1, 3).

Humidity of lumber of the 4th grade is not standardized.

2.4. The assessment of the quality of sawn timber, with the exception of deck timber, should be made on the basis of the worst face or edge for a given board, and square bars and beams - on the worst side.

2.5. Lumber surface roughness parameter Rt max should not exceed 1250 microns for selected, 1, 2 and 3 grades, and for grade 4 - 1600 microns according to GOST 7016.

2.4, 2.5. (Revised edition, Rev. No. 3).

2.7. Additional requirements for lumber intended for special shipbuilding

Rules for limiting vices


	selected
1. Knots 1.1. Adhered healthy, and in the bars both partially accreted and non-aggregated healthy:	Allowed in size in fractions of the width of the side and in quantity on any one-meter section of length on each side, no more than:
		Quantity, pcs.		Quantity, pcs.	Quantity, pcs.		Quantity, pcs.		Quantity, pcs.
plastic and rib edging: on lumber up to 40 mm thick								Allowed
plastic and rib edging: on lumber up to 40 mm thick						all over the edge
40 mm thick or more	1/4, but not more than 15 mm
Note. In bars, the number of knots is not standardized.
1.2. Partially fused and not fused	Allowed in the total number of intergrown sound knots in size in fractions of the width of the side and in quantity on any one-meter length section on each side, not more than:
		Quantity, pcs.		Quantity, pcs.	Quantity, pcs.		Quantity, pcs.		Quantity, pcs.
plastic and rib
edging: on lumber up to 40 mm thick						all over the edge		all over the edge
40 mm thick or more
1.3. Decayed, rotten and tobacco	Not allowed		Allowed in the total number of partially fused and unjoined healthy knots of the same size and not more than half of their number.
1.3. Decayed, rotten and tobacco	Wood surrounding tobacco knots should not show signs of rot.

Notes:

1. Knots less than half of the maximum allowable are not taken into account.

2. In sawn timber with a thickness of 40 mm or more (with the exception of the selected grade), oblong and sewn knots with a size along the minor axis of up to 6 mm and a depth of up to 3 mm are allowed without limiting the size along the major axis.

3. A stepson is allowed according to the norms of non-united knots. Not allowed in selected variety.

5. In sawn timber with a length of more than 3 m, it is allowed to have one knot in the size provided for in the norms of the adjacent lower grade.

	Norms for limiting defects in sawn timber for grades
	selected
	In lumber for load-bearing structures, the sum of the sizes of all knots located on a section 200 mm long should not exceed the maximum size of permissible knots
2. cracks
2.1. Plastic and edging, including facing to the end	Allowed length in fractions of the length of lumber, not more than:
	shallow		Shallow and deep

	deep

2.2. Plastic through, including facing to the end	Allowed length in mm, not more than:			Allowed total length in fractions of lumber length, not more than:


2.3. End (except shrinkage cracks)	Not allowed	Allowed at one end with a length in fractions of the width of the lumber, not more than:			Allowed provided that the integrity of the lumber is preserved

Note. Permissible crack sizes are set for lumber with a wood moisture content of not more than 22%, with a higher moisture content, these crack sizes are halved.
3. Defects in the structure of wood
3.1. Fiber inclination	Allowed no more than 5%	Allowed
	Not allowed	Not more than 20% of the area of the lumber face is allowed	Allowed
3.3. pockets	Allowed one-sided on any one-meter section of length in the amount of 1 pc. length no more than 50 mm	Allowed on any one-meter section of lumber length in pieces, no more		Allowed

3.4. Core and double core	Not allowed	Allowed without peeling and radial cracks only in lumber with a thickness of 40 mm or more	Allowed
3.5. Prorost	Not allowed	One-sided width is allowed in fractions of the corresponding side of the lumber, not more than:			Allowed

		and length in shares of lumber length, not more than:

	Not allowed		It is allowed to extend in fractions of the length of the lumber up to		Allowed

			but not more than 1 m
4. Fungal lesions
4.1. Mushroom sound spots (stripes)	Not allowed	Allowed by the total area in % of the lumber area, not more than:		Allowed

4.2. Sapwood fungus stains and mold	Not allowed	Superficial in the form of spots and stripes are allowed. Deep ones are allowed with a total area in% of the lumber area, not more than:			Allowed

	Not allowed		Not allowed		Only variegated sieve sound rot is allowed in the form of spots and stripes with a total area of not more than 10% of the lumber area
5. biological damage
5.1. Worm-hole	Allowed shallow on wane parts of lumber		Allowed on any one-meter section of lumber length in pieces, not more than:

6. Foreign inclusions, mechanical damage and processing defects
6.1. Foreign inclusions (wire, nails, metal fragments, etc.)	Not allowed
6.2. Wane (in edged lumber)	Acute not allowed				Dull and sharp are allowed, provided that the faces are propylene not less than 1/2 of the width, and the edges are not less than 3/4 of the length of the lumber
	Dull is allowed on faces and edges in proportions of the width of the corresponding sides of the lumber without length restrictions, not more than:

	It is allowed on separate sections of the edges with dimensions in fractions of the edge width, not more than:

	and length in fractions of the length of lumber, not more than:

Notes: 1. Bark on the wane of export lumber is not allowed. 2. Edged sawn timber that meets the requirements of a certain grade in all respects, but with a wane that exceeds the established norm for this grade, is allowed to be converted into unedged timber with the grade preserved.
6.3. Bevel cut	In lumber, one end (in export lumber, both ends) must be sawn perpendicular to the longitudinal axis of the lumber. Deviation from the perpendicularity of the end to the face and in addition is allowed up to 5% of the width and thickness of the lumber, respectively.
6.4. Risks, waviness, tear	Allowed within the limits of deviations from the nominal dimensions established in GOST 24454			Allowed with a depth of not more than 3 mm	Allowed
7. Warp
7.1. Warping is longitudinal along the face and edge, wingedness	Allowed deflection in fractions of the lumber length in%, not more than:				Allowed

Note. In unedged lumber, longitudinal warping along the edge is not standardized.
7.2. Warp transverse	Allowed deflection in fractions of the width of the lumber in%, not more than:				Allowed

Notes:

1. Warp rates are set for lumber with a moisture content of not more than 22%. With higher humidity, these norms are halved.

2. Wood defects not mentioned in this standard are allowed.

2.7.1. Lumber for sheathing parts and connections of sea boats, boats of sea navigation vessels, gliders, high-speed lake and river boats and sports vessels of the 1st class must comply with the requirements of the selected grade with the following additions:

the core part in the middle of the length of the lumber should be on the inner face: in the longitudinal sheathing - at least 50%, in the diagonal - at least 25% of the width of the face;

the sizes of intergrown, partially intergrown and non-united knots taken into account should not exceed 10 mm;

the number of considered intergrown knots should not exceed 1 pc. on any one-meter section of the length of the lumber, and partially fused, not fused - 1 pc. for 2 m of lumber length;

counted knots are allowed no closer than 10 mm from the edges of the lumber;

pockets on the outer face of lumber are not allowed.

considered knots are allowed: intergrown - not closer than 10 mm, partially intergrown and not intergrown - not closer than 15 mm from the ribs of the outer layer;

on the worst face and the lower halves of the edge area of the lumber, intergrown knots are allowed without restriction, and partially intergrown and unjoined - up to 1/3 of the width of the face;

cracks are allowed in lumber for external decks up to 1/4 of the thickness; for internal decks - 1/3 lumber thickness. Cracks in deck lumber are not limited in length;

blunt wane is allowed in deck lumber with a size of not more than 5 mm;

cancer on the best faces in the upper halves of the edge area, and pockets on the best face of lumber for outdoor decks are not allowed;

core within the bottom half of the deck lumber is allowed.

Note. The assessment of the quality of deck lumber is carried out by the best layer and the upper halves of the edge area.

(Revised edition, Rev. No. 1).

2.8. Sawn timber should be sorted by type of processing into edged and unedged, by size and grade (each grade separately).

At the request of the consumer, sawn timber can be sorted into groups of grades in accordance with the destinations established in the appendix to the standard.

Lumber for export must be sorted in accordance with the work order of the foreign trade organization.

2.9. The grade, nature of processing, dimensions and species of wood must be indicated in the customer's specification.

3. RULES OF ACCEPTANCE AND METHODS OF CONTROL

3.1. Acceptance rules and control methods - according to GOST 6564.

Grades (groups of varieties) of lumber	The main purposes of lumber
	Special shipbuilding - for sheathing and bracing of sea boats, boats, seagoing vessels, gliders, high-speed lake and river boats and sports vessels of the 1st class, decking of external and internal decks of sea vessels
	Agricultural engineering - for the manufacture of wooden parts of agricultural machines
	Carriage building - for the manufacture of wooden parts for railway carriages Shipbuilding Automotive industry - for the manufacture of wooden parts for trucks, trailers and semi-trailers Motor building, wagon building
	Construction and repair and maintenance needs, elements of load-bearing structures, window and door parts, planed parts, parts of wooden houses, etc. Manufacture of various woodworking products, including furniture, staves for jellied and dry barrels, special containers
	Container and packaging
	For use on low-responsibility parts in construction, cutting into small blanks for various purposes

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry of Forestry, Pulp and Paper and Woodworking Industry of the USSR

2. APPROVED AND INTRODUCED BY Decree of the USSR State Committee for Standards dated September 30, 1986 No. 2933

4. The standard fully complies with ST SEV 2369-80

5. REFERENCE REGULATIONS AND TECHNICAL DOCUMENTS

6. The limitation of the validity period was removed according to the protocol No. 3-93 of the Interstate Council for Standardization, Metrology and Certification (IUS 5-6-93)

7. EDITION (September 2007) with Amendments No. 1, 2, 3, approved in December 1987, September 1988, February 1990 (IUS 3-88, 1-89, 5-90)

6. The limitation of the period of validity was removed according to protocol N 3-93 of the Mechgosudarstvenny Council for Standardization, Metrology and Certification (IUS 5-6-93)

7. EDITION (September 2007) with Amendments No. 1, 2, 3, approved in December 1987, in September 1988, February 1990 (IUS 3-88.1-89, 5-90)

Amended by database manufacturer

This standard applies to sawn softwood and establishes technical requirements for sawn timber intended for use in the national economy and for export.

The standard does not apply to resonant and aviation lumber.

(Changed edition, Rev. N 3)

1. MAIN PARAMETERS AND DIMENSIONS

1.1. Lumber is divided into edged, unedged, boards, bars and beams.

1.2. Nominal dimensions of sawn timber and maximum deviations from nominal dimensions - according to GOST 24454.

By agreement with the consumer, lumber is allowed for the domestic market with a gradation in length, dimensions and tolerances established in GOST 9302 and GOST 26002.

(Changed edition, Rev. N 2).

Symbol examples:

Board - 2 - pine - 32x100 - GOST 8486-86

Board - 2 min. - 32 - GOST 8486-86

2. TECHNICAL REQUIREMENTS

2.1. Lumber must comply with the requirements of this standard and be made from wood of the following species: pine, spruce, fir, larch and cedar.

2.5. The surface roughness parameter of lumber should not exceed 1250 microns for selected, 1, 2 and 3 grades, and for grade 4 - 1600 microns according to GOST 7016.

2.4, 2.5. (Changed edition, Rev. N 3).

2.7. Additional requirements for lumber intended for special shipbuilding

Rules for limiting vices



	selected
	Allowed in size in fractions of the width of the side and in quantity on any one-meter section of length on each side, no more than:
1.1. Adhered healthy, and in the bars both partially accreted and non-aggregated healthy:
		Quantity, pcs.			Quantity, pcs.	Quantity, pcs.		Quantity, pcs.		Quantity, pcs.
plastic and rib edging: on lumber up to 40 mm thick									Allowed
							all over the edge
40 mm thick or more	1/4, but not more than 15 mm
Note. In bars, the number of knots is not standardized.
1.2. Partially fused and not fused	Allowed in the total number of intergrown sound knots in size in fractions of the width of the side and in quantity on any one-meter length section on each side, not more than:
			Quantity, pcs.		Quantity, pcs.	Quantity, pcs.		Quantity, pcs.		Quantity, pcs.
plastic and rib
edging: on lumber up to 40 mm thick							all over the edge		all over the edge
40 mm thick or more
1.3. Decayed, rotten and tobacco	Not allowed			Allowed in the total number of partially intergrown and ununited sound knots of the same size and not more than half of their number
	Wood surrounding tobacco knots should not show signs of rot.

Notes:

1. Knots less than half of the maximum allowable are not taken into account.

3. A stepson is allowed according to the norms of non-united knots. Not allowed in selected variety.

5. In sawn timber with a length of more than 3 m, it is allowed to have one knot in the size provided for in the norms of the adjacent lower grade.

Continuation


	Norms for limiting defects in sawn timber for grades
	selected
	In lumber for load-bearing structures, the sum of the sizes of all knots located on a section 200 mm long should not exceed the maximum size of permissible knots.
2. Cracks
2.1. Plastic and edging, including facing to the end	Allowed length in shares of lumber length, not more than:
	shallow		Shallow and deep

	deep

2.2. Plastic through, including facing to the end	Allowed length in mm, not more than:			Allowed total length in fractions of lumber length, not more than:

2.3. End (except shrinkage cracks)	Not allowed	Allowed at one end with a length in fractions of the width of the lumber, not more than:			Allowed provided that the integrity of the lumber is preserved

Note. Permissible crack sizes are set for lumber with a wood moisture content of not more than 22%, with a higher moisture content, these crack sizes are halved.
3. Defects in the structure of wood
3.1. Fiber inclination	Allowed no more than 5%	Allowed
	Not allowed	Not more than 20% of the area of the lumber face is allowed	Allowed
3.3. pockets	Allowed one-sided on any one-meter section of length in the amount of 1 pc. length no more than 50 mm	Allowed on any one-meter section of lumber length in pieces, no more		Allowed

3.4. Core and double core	Not allowed	Allowed without peeling and radial cracks only in lumber with a thickness of 40 mm or more	Allowed
3.5. Prorost	Not allowed	One-sided width is allowed in fractions of the corresponding side of the sawn timber, not more than:			Allowed

		and length in shares of lumber length, not more than:

	Not allowed		It is allowed to extend in fractions of the length of the lumber up to		Allowed

			but not more than 1 m
4. Fungal lesions
4.1. Mushroom sound spots (stripes)	Not allowed	Allowed by the total area in % of the lumber area, not more than:		Allowed

4.2. Sapwood fungus stains and mold	Not allowed	Superficial in the form of spots and stripes are allowed. Deep ones are allowed with a total area in% of the lumber area, not more than:			Allowed

	Not allowed		Not allowed		Only variegated sieve sound rot is allowed in the form of spots and stripes with a total area of not more than 10% of the lumber area
5. Biological damage
5.1. Worm-hole	Allowed shallow on wane parts of lumber		Allowed on any one-meter section of lumber length in pieces, not more than:

6. Foreign inclusions, mechanical damage and processing defects
6.1. Foreign inclusions (wire, nails, metal fragments, etc.)	Not allowed
6.2. Wane (in edged lumber)	Acute not allowed				Dull and sharp are allowed, provided that the faces are propylene not less than 1/2 of the width, and the edges are not less than 3/4 of the length of the lumber
	Dull is allowed on faces and edges in proportions of the width of the corresponding sides of the lumber without length restrictions, not more than:

	It is allowed on separate sections of the edges with dimensions in fractions of the edge width, not more than:

	and length in fractions of the length of lumber, not more than:

Notes:
1. Bark on the wane of export lumber is not allowed.
2. Edged sawn timber that meets the requirements of a certain grade in all respects, but with a wane that exceeds the established norm for this grade, is allowed to be converted into unedged timber with the grade preserved.
6.3. Bevel cut	In lumber, one end (in export lumber, both ends) must be sawn perpendicular to the longitudinal axis of the lumber. Deviation from the perpendicularity of the end to the face and edge is allowed up to 5% of the width and thickness of the lumber, respectively.
6.4. Risks, waviness, tear	Allowed within the limits of deviations from the nominal dimensions established in GOST 24454			Allowed with a depth of not more than 3 mm	Allowed
7. Warp
7.1. Warping is longitudinal along the face and edge, wingedness	Allowed deflection in fractions of the lumber length in%, not more than:				Allowed

Note. In unedged lumber, longitudinal warping along the edge is not standardized.
7.2. warped- transverse	Allowed deflection in fractions of the width of the lumber in%, not more than:				Allowed

Notes:

1. Warping standards are set for lumber with a moisture content of not more than 22%. With higher humidity, these norms are halved.

2. Wood defects not mentioned in this standard are allowed.

the core part in the middle of the length of the lumber should be on the inner face: in the longitudinal sheathing - at least 50%, in the diagonal - at least 25% of the width of the face;

the sizes of intergrown, partially intergrown and non-united knots taken into account should not exceed 10 mm;

the number of considered intergrown knots should not exceed 1 pc. on any one-meter section of the length of the lumber, and partially fused, not fused - 1 piece, per 2 m of the length of the lumber;

counted knots are allowed no closer than 10 mm from the edges of the lumber;

pockets on the outer face of lumber are not allowed.

considered knots are allowed: intergrown - not closer than 10 mm, partially intergrown and not intergrown - not closer than 15 mm from the ribs of the outer layer;

on the worst face and the lower halves of the area of the edges of sawn timber, intergrown knots are allowed without restriction, and partially intergrown and unjoined - up to 1/3 of the width of the face;

cracks are allowed in lumber for external decks up to 1/4 of the thickness; for internal decks - 1/3 of lumber thickness. Cracks in deck lumber are not limited in length;

blunt wane is allowed in deck lumber with a size of not more than 5 mm;

cancer on the best faces and upper halves of the edge area, and pockets on the best face of lumber for outdoor decks are not allowed;

core within the bottom half of the deck lumber is allowed.

Note. The assessment of the quality of deck lumber is carried out by the best layer and the upper halves of the edge area.

(Changed edition, Rev. N 1).

2.8. Sawn timber should be sorted by type of processing into edged and unedged, by size and grade (each grade separately).

At the request of the consumer, lumber can be sorted into groups of grades in accordance with the destinations established in the mandatory annex to the standard.

Lumber for export must be sorted in accordance with the work order of the foreign trade organization.

Special shipbuilding - for sheathing and bracing of sea boats, boats, seagoing vessels, gliders, high-speed lake and river boats and sports vessels of the 1st class, decking of external and internal decks of sea vessels

Agricultural engineering - for the manufacture of wooden parts of agricultural machines

Carriage building - for the manufacture of wooden parts for railway carriages

Shipbuilding

Automotive industry - for the manufacture of wooden parts for trucks, trailers and semi-trailers

Bridge building, wagon building

Construction and repair and maintenance needs, elements of load-bearing structures, window and door parts, planed parts, parts of wooden houses, etc.

Manufacture of various woodworking products, including furniture, staves for jellied and dry barrels, special containers

Container and packaging

For use on low-responsibility parts in construction, cutting into small blanks for various purposes

Electronic text of the document
prepared by CJSC "Kodeks" and checked against:
official publication
Lumber. Specifications:

Sat. GOSTs. - M.: Standartinform, 2007

INTERSTATE STANDARD

SOFTENER SAWN

TECHNICAL CONDITIONS

Official edition

Standartinform

UDC 634.984.4:674.032:006.354

Group K21

INTERSTATE STANDARD

SOFTENER SAWN

Specifications

Coniferous sawn timber. Specifications

MKS 79.040 OKP 53 3100

Introduction date 01.01.88

This standard applies to sawn softwood and establishes technical requirements for sawn timber intended for use in the national economy and for export.

The standard does not apply to resonant and aviation lumber.

(Revised edition, Rev. No. 3).

1. MAIN PARAMETERS AND DIMENSIONS

1.1. Lumber is divided into edged, unedged, boards, bars and beams.

Terms and definitions - according to GOST 18288.

1.2. Nominal dimensions of lumber and maximum deviations from nominal dimensions - according to GOST 24454.

By agreement with the consumer, lumber is allowed for the domestic market with a gradation in length, dimensions and tolerances established in GOST 9302 and GOST 26002.

(Revised edition, Rev. No. 2).

Symbol examples:

Board - 2 - pine - 32x 100 - GOST 8486-86 Board - 2 min. - 32 - GOST 8486-86

2. TECHNICAL REQUIREMENTS

2.1. Sawn timber must comply with the requirements of this standard and be made from wood of the following species: pine, if, fir, larch and cedar.

The purpose of lumber of various grades is given in the appendix.

(Changed edition, Rev. No. 1, 3).

Humidity of lumber of the 4th grade is not standardized.

Antiseptic - according to GOST 10950.

2.4. The assessment of the quality of sawn timber, with the exception of deck timber, should be made according to the seam or edge that is the worst for a given board, and bars and square beams - according to the worst side.

Official edition

Reprint prohibited

2.5. The surface roughness parameter of Yat max sawn timber should not exceed 1250 microns for selected, 1, 2 and 3 grades, and for grade 4 - 1600 microns according to GOST 7016.

2.4, 2.5. (Revised edition, Rev. No. 3).

2.6. Non-parallelism of faces and edges in edged sawn timber, as well as faces in unedged sawn timber is allowed within the limits of deviations from the nominal dimensions established by GOST 24454.

2.7. Additional requirements for lumber intended for special shipbuilding

Rules for limiting vices

flat section of length on each side, not more than:

1.1. Conjoined healthy, and in the bars both partially connate and non-concrete healthy:

Note. In bars, the number of knots is not standardized.

1.2. Partially intergrown - Allowed in the total number of intergrown healthy knots, the size in fractions of the width of the intergrown and non-united sides and in the amount on any one-meter length section on each side, not


plastic and rib
edging: on sawn timber up to

40 mm thick and more

1.3. Decayed, rotten and tobacco	Not allowed	Allowed in the total number of partially fused and unjoined healthy knots of the same size and not more than half of their number.

Wood surrounding tobacco knots should not show signs of rot.

Notes:

1. Knots less than half of the maximum allowable are not taken into account.

3. A stepson is allowed according to the norms of non-united knots. Not allowed in selected variety.

5. In sawn timber with a length of more than 3 m, it is allowed to have one knot in the size provided for in the norms of the adjacent lower grade.

Continuation

Wood defects according to GOST 2140

selected

In lumber for load-bearing structures, the sum of the sizes of all knots located on a section 200 mm long should not exceed the maximum size of permissible knots

2. Cracks

2.1. Plastic and edging, including facing to the end

2.2. Plastic through, including facing to the end

2.3. End (except shrinkage cracks)

Allowed length in fractions of lumber length, not more than: Shallow Shallow and deep

V 6 I U 4 Oz

deep

Uyu I U6

Allowed length in mm, not more than:

2

Allowed provided that the integrity of the lumber is preserved

Not allowed

Allowed total length in fractions of lumber length, not more than:

Ub

at 4

Allowed at one end with a length in fractions Allowed lumber widths, not more than: subject to

storage whole-

U. Ouse

2

lumber density

Note. Permissible crack sizes are set for lumber with a wood moisture content of not more than 22%, with a higher moisture content, these crack sizes are halved.

3. Defects in the structure of wood

3.1. Fiber inclination

3.3. pockets

Allowed no more than 5%

Not allowed-

3.4. core double core

Allowed one-sided on any one-meter section of length in the amount of 1 pc. length no more than 50 mm

Not allowed-

3.5. Prorost

Not allowed-

Not more than 20% of the area of the lumber face is allowed

Allowed on any one-meter section of lumber length in pieces, no more

Allowed

Wu zo

Not allowed

Allowed Allowed

without peeling and radial cracks only in lumber with a thickness of 40 mm or more

One-sided width is allowed in fractions of the corresponding side of the sawn timber, not more than:

Y,0 I Vs I V 4

and length in shares of lumber length, not more than:

Ouyu I Ouyu

It is allowed to extend in fractions of the length of the lumber up to

Vs I Oz

but not more than 1 m

Allowed

Continuation

Defects in wood		Norms for limiting defects in sawn timber for grades
Defects in wood
	selected
4. Fungal lesions

4.1. Mushroom sound	Not allowed-	Allowed	general area	Allowed
spots (streaks)		sparing in% of the sawmill area
		rial, not more than:

4.2. Sapwood	Not allowed-	Allowed surface in the form of spots and			Allowed
mushroom coloring and plaid		los. Deep ones are allowed with a total area in % of
		lumber area, not more than:

	Not allowed		Not allowed		Allowed
					only variegated sieve sound rot in the form of spots and stripes
					cabbage soup area
					no more than 10% of the lumber area
5. Biological
damage
5.1. Worm-hole	Allowed	shallow on	Allowed	on any one meter area
	ash parts of lumber		lumber length in pieces, not more than:

6. Foreign inclusions
cheniya, mechanical damage and defects of processing
6.1. foreign		Not allowed
inclusions (wire, nails, metal fragments, etc.)
6.2. Wane (short-		Acute not allowed			Allowed
lumber)	Blunt is allowed on faces and edges in size in fractions of the width				dull and sharp
	we have the corresponding sides of the lumber without			restrictions on
	length, not more than:				plastics of propylene not less than
					by "/2 width, and
	Allowed on separate sections of the edges in size in fractions of shi-				edges are not me-
	edge cracks, not more than:				her than 3 D
					lumber length
	and length in fractions of the length of lumber, not more than:

Notes:

1. Bark on the wane of export lumber is not allowed.

6.3. Bevel cut

In lumber, one end (in export lumber, both ends) must be sawn perpendicular to the longitudinal axis of the lumber. Deviation from the perpendicularity of the end to the face and in addition is allowed up to 5% of the width and thickness of the lumber, respectively.

6.4. Risks, toast, snatch

Allowed within the limits of deviations from the nominal dimensions established in GOST 24454

Allowed with a depth of not more than 3 mm

Allowed

Continuation

Note. In unedged lumber, longitudinal warping along the edge is not standardized.

7.2. Warping Allowed deflection in fractions of the width of the lumber in%, Allowed transverse not more than:

1 I 1 I 1 I 2

Notes:

1. Warp rates are set for lumber with a moisture content of not more than 22%. With higher humidity, these norms are halved.

2. Wood defects not mentioned in this standard are allowed.

the core part in the middle of the length of the lumber should be on the inner layer: in the longitudinal sheathing - at least 50%, in the diagonal - at least 25% of the width of the layer;

the sizes of intergrown, partially intergrown and non-united knots taken into account should not exceed 10 mm;

the number of considered intergrown knots should not exceed 1 pc. on any one-meter section of the length of the lumber, and partially fused, not fused - 1 pc. for 2 m of lumber length;

counted knots are allowed no closer than 10 mm from the edges of the lumber; pockets on the outer layer of lumber are not allowed.

considered knots are allowed: intergrown - not closer than 10 mm, partially intergrown and not intergrown - not closer than 15 mm from the ribs of the outer layer;

on the worst layer and the lower halves of the edge area of the sawn timber, intergrown knots are allowed without restriction, and partially intergrown and not intergrown - up to "/ 3 of the width of the layer;

cracks are allowed in lumber for external decks up to D 4 thickness; for internal decks - "D lumber thickness. Cracks in deck lumber are not limited along the length;

blunt wane is allowed in deck lumber with a size of not more than 5 mm; cancer on the best faces in the upper halves of the edge area, and pockets on the best face of lumber for outdoor decks are not allowed;

core within the bottom half of the deck lumber is allowed. Note. The assessment of the quality of deck lumber is carried out by the best layer and the upper halves of the edge area.

(Revised edition, Rev. No. 1).

2.8. Sawn timber should be sorted by type of processing into edged and unedged, by size and grade (each grade separately).

At the request of the consumer, sawn timber can be sorted into groups of grades in accordance with the destinations established in the appendix to the standard.

Lumber for export must be sorted in accordance with the work order of the foreign trade organization.

2.9. The grade, nature of processing, dimensions and species of wood must be indicated in the customer's specification.

3. RULES OF ACCEPTANCE AND METHODS OF CONTROL

3.1. Acceptance rules and control methods - according to GOST 6564.

4, MARKING, TRANSPORT AND STORAGE

4.1. Marking, packaging and transportation of lumber must be carried out in accordance with GOST 6564 and GOST 19041.

Dimensions of transport packages - according to GOST 16369.

4.2. Sawn timber storage - according to GOST 3808.1 and GOST 19041.

APPLICATION

Mandatory

Grades (groups of varieties) of lumber

The main purposes of lumber

Agricultural engineering - for the manufacture of wooden parts of agricultural machines

0, 1,2,3 Car building - for the manufacture of wooden parts for railway cars

Shipbuilding

Automotive industry - for the manufacture of wooden parts for platforms of trucks, trailers and semi-trailers

1, 2, 3 Construction and maintenance needs, load-bearing structural elements

elements, parts of windows and doors, planed parts, parts of wooden houses, etc.

Manufacture of various woodworking products, including furniture, staves for jellied and dry barrels, special containers

3, 4 Tare and packaging

For use on low-responsibility parts in construction, cutting into small blanks for various purposes

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry of Forestry, Pulp and Paper and Woodworking Industry of the USSR

2. APPROVED AND INTRODUCED BY Decree of the USSR State Committee for Standards dated September 30, 1986 No. 2933

3. REPLACE GOST 8486-66

4. The standard fully complies with ST SEV 2369-80

5. REFERENCE REGULATIONS AND TECHNICAL DOCUMENTS

	Item number
GOST 2140-81
GOST 3808.1-80
GOST 6564-84
GOST 7016-82
GOST 9302-83
GOST 10950-78
GOST 16369-96
GOST 18288-87
GOST 19041-85
GOST 24454-80
GOST 26002-83

6. The limitation of the validity period was removed according to the protocol No. 3-93 of the Interstate Council for Standardization, Metrology and Certification (IUS 5-6-93)

7. EDITION (September 2007) with Amendments No. 1, 2, 3, approved in December 1987, September 1988, February 1990 (IUS 3-88, 1-89, 5-90)

GOST 8486-86

INTERSTATE STANDARD

SOFTENER SAWN

TECHNICAL CONDITIONS

Introduction date 01.01.88

This standard applies to sawn softwood and establishes technical requirements for sawn timber intended for use in the national economy and for export.

The standard does not apply to resonant and aviation lumber.

(Revised edition, Rev. No. 3).

1. MAIN PARAMETERS AND DIMENSIONS

Terms and definitions - by GOST 18288.

(Revised edition, Rev. No. 2).

Symbol examples:

Board- 2 - pine - 32 100- GOST 8486-86

Board - 2 min. - 32 - GOST 8486 -86

2. TECHNICAL REQUIREMENTS

2.1. Lumber must comply with the requirements of this standard and be made from wood of the following species: pine, spruce, fir, larch and cedar.

(Amendment).

The purpose of lumber of various grades is given in.

(Changed edition, Rev. No. 1, 3).

Humidity of lumber of the 4th grade is not standardized.

Antiseptic - according to GOST 10950.

Rules for limiting vices

Norms for limiting defects in sawn timber for grades

selected

1. Knots

1.1. Adhered healthy, and in the bars both partially accreted and non-aggregated healthy:

Allowed in size in fractions of the width of the side and in quantity on any one-meter section of length on each side, no more than:

qty,
PC.

plastic and rib edging: on lumber up to 40 mm thick

Allowed

all over the edge

40 mm thick or more

1/4, but not more than 15 mm

Note. In bars, the number of knots is not standardized.

1.2. Partially fused and not fused

Allowed in the total number of intergrown sound knots in size in fractions of the width of the side and in quantity on any one-meter length section on each side, not more than:

qty,
PC.

plastic and rib

edging: on lumber up to 40 mm thick

all over the edge

40 mm thick or more

1.3. Decayed, rotten and tobacco

Not allowed

Allowed in the total number of partially fused and unjoined healthy knots of the same size and not more than half of their number.

Wood surrounding tobacco knots should not show signs of rot.

Notes:

1. Knots less than half of the maximum allowable are not taken into account.

3. A stepson is allowed according to the norms of non-united knots. Not allowed in selected variety.

5. In sawn timber with a length of more than 3 m, it is allowed to have one knot in the size provided for in the norms of the adjacent lower grade.

In lumber for load-bearing structures, the sum of the sizes of all knots located on a section 200 mm long should not exceed the maximum size of permissible knots

2. cracks

2.1. Plastic and edging, including facing to the end

Allowed length in fractions of the length of lumber, not more than:

shallow

Shallow and deep

deep

2.2. Plastic through, including facing to the end

Allowed length in mm, not more than:

Allowed total length in fractions of lumber length, not more than:

2.3. End (except shrinkage cracks)

Not allowed

Allowed at one end with a length in fractions of the width of the lumber, not more than:

Allowed provided that the integrity of the lumber is preserved

Note. Permissible crack sizes are set for lumber with a wood moisture content of not more than 22%, with a higher moisture content, these crack sizes are halved.

3. Defects in the structure of wood

3.1. Fiber inclination

Allowed no more than 5%

Allowed

Not allowed

Not more than 20% of the area of the lumber face is allowed

Allowed

3.3. pockets

Allowed one-sided on any one-meter section of length in the amount of 1 pc. length no more than 50 mm

Allowed on any one-meter section of lumber length in pieces, no more

Allowed

3.4. Core and double core

Not allowed

Allowed without peeling and radial cracks only in lumber with a thickness of 40 mm or more

Allowed

3.5. Prorost

Not allowed

One-sided width is allowed in fractions of the corresponding side of the sawn timber, not more than:

Allowed

and length in shares of lumber length, not more than:

Not allowed

It is allowed to extend in fractions of the length of the lumber up to

Allowed

but not more than 1 m

4. Fungal lesions

4.1. Mushroom sound spots (stripes)

Not allowed

Allowed by the total area in % of the lumber area, not more than:

Allowed

4.2. Sapwood fungus stains and mold

Not allowed

Superficial in the form of spots and stripes are allowed. Deep ones are allowed with a total area in% of the lumber area, not more than:

Allowed

Not allowed

Only variegated sieve sound rot is allowed in the form of spots and stripes with a total area of not more than 10% of the lumber area

5. biological damage

5.1. Worm-hole

Allowed shallow on wane parts of lumber

Allowed on any one-meter section of lumber length in pieces, not more than:

6. Foreign inclusions, mechanical damage and processing defects

6.1. Foreign inclusions (wire, nails, metal fragments, etc.)

Not allowed

6.2. Wane (in edged lumber)

Acute not allowed

Dull and sharp are allowed, provided that the faces are propylene not less than 1/2 of the width, and the edges are not less than 3/4 of the length of the lumber

Dull is allowed on faces and edges in proportions of the width of the corresponding sides of the lumber without length restrictions, not more than:

It is allowed on separate sections of the edges with dimensions in fractions of the edge width, not more than:

and length in fractions of the length of lumber, not more than:

Notes :

1. Bark on the wane of export lumber is not allowed.

6.3. Bevel cut

6.4. Risks, waviness, tear

Allowed within the limits of deviations from the nominal dimensions established in GOST 24454

Allowed with a depth of not more than 3 mm

Allowed

7. Warp

7.1. Warping is longitudinal along the face and edge, wingedness

Allowed deflection in fractions of the lumber length in%, not more than:

Allowed

Note. In unedged lumber, longitudinal warping along the edge is not standardized.

7.2. Warp transverse

Allowed deflection in fractions of the width of the lumber in%, not more than:

Allowed

Notes :

1. Warp rates are set for lumber with a moisture content of not more than 22%. With higher humidity, these norms are halved.

2. Wood defects not mentioned in this standard are allowed.

the core part in the middle of the length of the lumber should be on the inner face: in the longitudinal sheathing - at least 50%, in the diagonal - at least 25% of the width of the face;

the sizes of intergrown, partially intergrown and non-united knots taken into account should not exceed 10 mm;

the number of considered intergrown knots should not exceed 1 pc. on any one-meter section of the length of the lumber, and partially fused, not fused - 1 pc. for 2 m of lumber length;

counted knots are allowed no closer than 10 mm from the edges of the lumber;

pockets on the outer face of lumber are not allowed.

considered knots are allowed: intergrown - not closer than 10 mm, partially intergrown and not intergrown - not closer than 15 mm from the ribs of the outer layer;

on the worst face and the lower halves of the edge area of the lumber, intergrown knots are allowed without restriction, and partially intergrown and unjoined - up to 1/3 of the width of the face;

cracks are allowed in lumber for external decks up to 1/4 of the thickness; for internal decks - 1/3 lumber thickness. Cracks in deck lumber are not limited in length;

blunt wane is allowed in deck lumber with a size of not more than 5 mm;

cancer on the best faces in the upper halves of the edge area, and pockets on the best face of lumber for outdoor decks are not allowed;

core within the bottom half of the deck lumber is allowed.

Note. The assessment of the quality of deck lumber is carried out by the best layer and the upper halves of the edge area.

(Revised edition, Rev. No. 1).

2.8. Sawn timber should be sorted by type of processing into edged and unedged, by size and grade (each grade separately).

Varieties (groups of varieties) lumber	The main purposes of lumber
	Special shipbuilding - for sheathing and bracing of sea boats, boats, seagoing vessels, gliders, high-speed lake and river boats and sports vessels of the 1st class, decking of external and internal decks of sea vessels
	Agricultural engineering - for the manufacture of wooden parts of agricultural machines
	Carriage building - for the manufacture of wooden parts for railway carriages Shipbuilding Automotive industry - for the manufacture of wooden parts for trucks, trailers and semi-trailers Motor building, wagon building
	Construction and repair and maintenance needs, elements of load-bearing structures, window and door parts, planed parts, parts of wooden houses, etc. Manufacture of various woodworking products, including furniture, staves for jellied and dry barrels, special containers
	Container and packaging
	For use on low-responsibility parts in construction, cutting into small blanks for various purposes

1. DEVELOPED AND INTRODUCED by the Ministry of Forestry, Pulp and Paper and Woodworking Industry of the USSR

2. APPROVED AND INTRODUCED BY Decree of the USSR State Committee for Standards dated September 30, 1986 No. 2933

4. The standard fully complies with ST SEV 2369-80

5. REFERENCE REGULATIONS AND TECHNICAL DOCUMENTS

6. The limitation of the validity period was removed according to the protocol No. 3-93 of the Interstate Council for Standardization, Metrology and Certification (IUS 5-6-93)

7. EDITION (September 2007) with Amendments No. 1, 2, 3, approved in December 1987, September 1988, February 1990 (IUS 3-88, 1-89, 5-90)