GOST 8486-86

Group K21

INTERSTATE STANDARD

SOFTWOOD TIMBER

Specifications

Coniferous sawn timber. Specifications

MKS 79.040
OKP 53 3100

Date of introduction 1988-01-01

INFORMATION DATA

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

2. APPROVED AND ENTERED INTO EFFECT by Resolution of the USSR State Committee on Standards dated September 30, 1986 N 2933

3. IN REPLACE GOST 8486-66

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

5. REFERENCE REGULATIVE AND TECHNICAL DOCUMENTS

Notes:

1. Knots less than half the maximum allowed size are not taken into account.

2. In lumber with a thickness of 40 mm or more (with the exception of selected grades), oblong and stitched 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. The stepson is allowed according to the norms of unfused knots. Not allowed in selected variety.

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

5. In lumber longer than 3 m, it is allowed to have one knot of the size specified in the standards of the adjacent lower grade.

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

Continuation

Notes:

1. Warp standards are established for lumber with a moisture content of no 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 plating 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 selected grade with the following additions:

the core part in the middle of the length of the lumber must 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 dimensions of the fused, partially fused and unfused knots taken into account should not exceed 10 mm;

the number of fused knots taken into account should not exceed 1 piece. on any one-meter length of lumber, and partially fused, unfused - 1 piece, per 2 m length of lumber;

the knots taken into account 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. Lumber for decking sea ​​vessels must meet the requirements of select and first grades for external decks and first and second grades for internal decks with the following additions:

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

the knots taken into account are allowed: fused - no closer than 10 mm, partially fused and unfused - no closer than 15 mm from the ribs of the outer face;

on the worst face and the lower halves of the edge area of ​​lumber, fused knots are allowed without limitation, and partially fused and unfused knots are allowed 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 the thickness of lumber. Cracks in deck lumber are not limited in length;

blunt wane is allowed in deck lumber with a size of no 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 external decks are not allowed;

core within the bottom half of deck lumber is permitted.

Note. The quality of deck lumber is assessed based on the best face and the upper halves of the edge area.

(Changed edition, Amendment No. 1).

2.8. Lumber must 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 purposes established in the mandatory annex to the standard.

Lumber for export must be sorted in accordance with the order issued by the foreign trade organization.

2.9. The grade, nature of processing, size and type of wood must be indicated in the consumer specification.

3. ACCEPTANCE RULES AND CONTROL METHODS

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

APPLICATION
Mandatory

Electronic document text
prepared by Kodeks JSC and verified against:
official publication
Lumber. Specifications:

Sat. GOST. - M.: Standartinform, 2007

Revision of the document taking into account
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JSC "Kodeks"

GOST 8486-86

INTERSTATE STANDARD

SOFTWOOD TIMBER

TECHNICAL CONDITIONS

Date of introduction 01.01.88

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

The standard does not apply to resonance and aircraft lumber.

(Changed edition, Amendment No. 3).

1. MAIN PARAMETERS AND DIMENSIONS

Terms and definitions - by GOST 18288.

(Changed edition, Amendment No. 2).

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

Examples of symbols:

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

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

2. TECHNICAL REQUIREMENTS

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

(Amendment).

The purpose of various types of lumber is given in.

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

The moisture content of grade 4 lumber is not standardized.

Antiseptic treatment - according to GOST 10950.

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

Norms for limiting vices

2.7.1. Lumber for plating 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 selected grade with the following additions:

the core part in the middle of the length of the lumber must 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 dimensions of the fused, partially fused and unfused knots taken into account should not exceed 10 mm;

the number of fused knots taken into account should not exceed 1 piece. on any one-meter length of lumber, and partially fused, unfused - 1 piece. per 2 m length of lumber;

the knots taken into account 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. Lumber for decking of marine vessels must meet the requirements of select and first grades for external decks and first and second grades for internal decks with the following additions:

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

the knots taken into account are allowed: fused - no closer than 10 mm, partially fused and unfused - no closer than 15 mm from the ribs of the outer face;

on the worst face and the lower halves of the edge area of ​​lumber, fused knots are allowed without limitation, and partially fused and unfused knots are allowed 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 the thickness of lumber. Cracks in deck lumber are not limited in length;

blunt wane is allowed in deck lumber with a size of no 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 external decks are not allowed;

core within the bottom half of deck lumber is permitted.

Note: The quality of deck lumber is assessed based on the best face and the upper halves of the edge area.

(Changed edition, Amendment No. 1).

2.8. Lumber must be sorted by type of processing into edged and unedged, by size and grade (each grade separately).

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

2. APPROVED AND ENTERED INTO EFFECT by Resolution of the USSR State Committee on Standards dated September 30, 1986 No. 2933

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

5. REFERENCE REGULATIVE AND TECHNICAL DOCUMENTS

6. The validity period was lifted according to 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)

INTERSTATE STANDARD

Date of introduction01.01.88

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

The standard does not apply to resonance and aircraft lumber.

1. MAIN PARAMETERS AND DIMENSIONS

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

Terms and definitions - according to GOST 18288.

1.2. Nominal dimensions of lumber and maximum deviations from nominal dimensions are in accordance with GOST 24454.

By agreement with the consumer, lumber with gradations in length, size and permissible deviations established in GOST 9302 and GOST 26002 are allowed for the domestic market.

(Changed edition, Amendment No. 2).

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

Examples of symbols:

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

Board – 2 pieces – 32 – GOST 8486-86

2. TECHNICAL REQUIREMENTS

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

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

2.3. Sawn timber of selected, 1st, 2nd, 3rd grades is produced dry (with a moisture content of no more than 22%), raw (with a moisture content of more than 22%) and raw antiseptic. During the period from May 1 to October 1, the production of raw antiseptic and raw lumber is allowed by agreement with the consumer (customer).

The moisture content of grade 4 lumber is not standardized.

Antiseptic treatment - according to GOST 10950.

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

2.5. The surface roughness parameter of lumber Rmmax should not exceed 1250 microns for selected, 1st, 2nd and 3rd grades, and for the 4th grade – 1600 microns according to GOST 7016.

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

2.6. Non-parallelism of faces and edges in edged lumber, as well as faces in unedged lumber, 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

2.7.1. Lumber for plating 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 selected grade with the following additions:

the core part in the middle of the length of the lumber must 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 dimensions of the fused, partially fused and unfused knots taken into account should not exceed 10 mm;

the number of fused knots taken into account should not exceed 1 piece. on any one-meter length of lumber, and partially fused, unfused - 1 piece. per 2 m length of lumber;

the knots taken into account 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. Lumber for decking of marine vessels must meet the requirements of select and first grades for external decks and first and second grades for internal decks with the following additions:

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

the knots taken into account are allowed: fused - no closer than 10 mm, partially fused and unfused - no closer than 15 mm from the ribs of the outer face;

on the worst face and the lower halves of the edge area of ​​lumber, fused knots are allowed without limitation, and partially fused and unfused knots are allowed up to 1/3 of the width of the face;

cracks are allowed in lumber for external decks up to a depth of ½ thickness; for internal decks - 1/3 of the thickness of lumber. Cracks in deck lumber are not limited in length;

blunt wane is allowed in deck lumber with a size of no 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 external decks are not allowed;

core within the bottom half of deck lumber is permitted.

Note. The quality of deck lumber is assessed based on the best face and the upper halves of the edge area.

(Changed edition, Amendment No. 1).

2.8. Lumber must 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 purposes established in the mandatory annex to the standard.

Lumber for export must be sorted in accordance with the order issued by the foreign trade organization.

2.9. The grade, nature of processing, size and type of wood must be indicated in the consumer specification.

Norms for limiting vices

3. ACCEPTANCE RULES AND CONTROL METHODS

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

4. MARKING, TRANSPORTATION AND STORAGE

4.1. Labeling, 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. Storage of lumber - in accordance with GOST 3808.1 and GOST 19041.

APPLICATION

Mandatory

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 ENTERED INTO EFFECT BY RESOLUTION OF THE USSR State Committee on Standards dated September 30, 1986 No. 2933

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

4. INSTEAD GOST 8486-66

5. REFERENCE REGULATIVE AND TECHNICAL DOCUMENTS

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

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

6. The validity period was lifted according to Protocol No. 3-93 of the Mechanized State 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)


An amendment was made, published in IUS No. 12, 2013

Amendment made by database manufacturer

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

The standard does not apply to resonance and aircraft lumber.

(Changed edition, Amendment No. 3)

1. MAIN PARAMETERS AND DIMENSIONS

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

Terms and definitions - according to GOST 18288.

1.2. Nominal dimensions of lumber and maximum deviations from nominal dimensions are in accordance with GOST 24454.

By agreement with the consumer, lumber with gradations in length, size and permissible deviations established in GOST 9302 and GOST 26002 are allowed for the domestic market.

(Changed edition, Amendment No. 2).

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

Examples of symbols:

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

Board - 2 pieces - 32 - GOST 8486-86

2. TECHNICAL REQUIREMENTS

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

(Amendment. IUS N 12-2013).

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

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

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

2.3. Sawn timber of selected, 1st, 2nd, 3rd grades is produced dry (with a moisture content of no more than 22%), raw (with a moisture content of more than 22%) and raw antiseptic. During the period from May 1 to October 1, the production of raw antiseptic and raw lumber is allowed by agreement with the consumer (customer).

The moisture content of grade 4 lumber is not standardized.

Antiseptic treatment - according to GOST 10950.

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

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

2.4, 2.5. (Changed edition, Amendment No. 3).

2.6. Non-parallelism of faces and edges in edged lumber, as well as faces in unedged lumber, 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

Norms for limiting vices

Notes:

1. Knots less than half the maximum allowed size are not taken into account.

2. In lumber with a thickness of 40 mm or more (with the exception of selected grades), oblong and stitched 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. The stepson is allowed according to the norms of unfused knots. Not allowed in selected variety.

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

5. In lumber longer than 3 m, it is allowed to have one knot of the size specified in the standards 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 permitted knots.

Continuation

Notes:

1. Warp standards are established for lumber with a moisture content of no 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 plating 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 selected grade with the following additions:

the core part in the middle of the length of the lumber must 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 dimensions of the fused, partially fused and unfused knots taken into account should not exceed 10 mm;

the number of fused knots taken into account should not exceed 1 piece. on any one-meter length of lumber, and partially fused, unfused - 1 piece, per 2 m length of lumber;

the knots taken into account 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. Lumber for decking of marine vessels must meet the requirements of select and first grades for external decks and first and second grades for internal decks with the following additions:

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

the knots taken into account are allowed: fused - no closer than 10 mm, partially fused and unfused - no closer than 15 mm from the ribs of the outer face;

on the worst face and the lower halves of the edge area of ​​lumber, fused knots are allowed without limitation, and partially fused and unfused knots are allowed 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 the thickness of lumber. Cracks in deck lumber are not limited in length;

blunt wane is allowed in deck lumber with a size of no 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 external decks are not allowed;

core within the bottom half of deck lumber is permitted.

Note. The quality of deck lumber is assessed based on the best face and the upper halves of the edge area.

(Changed edition, Amendment No. 1).

2.8. Lumber must 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 purposes established in the mandatory annex to the standard.

Lumber for export must be sorted in accordance with the order issued by the foreign trade organization.

2.9. The grade, nature of processing, size and type of wood must be indicated in the consumer specification.

3. ACCEPTANCE RULES AND CONTROL METHODS

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

APPENDIX (required)

APPLICATION
Mandatory

Electronic document text
prepared by Kodeks JSC and verified against:
official publication
Lumber. Specifications:

Sat. GOST. - M.: Standartinform, 2007

Revision of the document taking into account
changes and additions prepared
JSC "Kodeks"