BS 6399

) c ( , 7 0 : 8 0 0 1 0 2 / 3 0 / 3 2 f o s a t c e r r o c n o i s r e V , a r a M i g o l o n k e I T S f B o y t i s r e v i n U , a r a M i g o l o n k e T f o y t i s r e v i n U : y p o c d e s n e c i L

BRITISH STANDARD

BS 5669-2: 1989 Incorporating Amendment Nos 1, 2 and 3 and implementing Amendment No. 4

Particleboard — Part 2: Specification for wood chipboard

Not published separately

) c ( , 7 BS 5669-2:1989 0 : 8 0 0 1 0 2 / 3 0 / 3 2 f o s a t c e r r o c n o i s r e V , a r a M i g o l o n k e I T S f B o y t i s r e v i n U , a r a M i g This British Standard, having o been prepared under the l o direction of the Timber Standards Policy Committee, Committee, n Standards published under under the k was published e authority authority of the Board of BSI and comes into into effect effect on T f 31 October 1989 o y © BSI 10-1998 t i s r First published February 1979 e First revision in Parts, v Part 2, August 1989 i n U The following BSI references : relate to the work on this y standard: p Committee reference TIB/14 o Draft for comment 88/13531 DC c d ISBN 0 580 17728 9 e s n e c i L

Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Timber Standards Policy Committee (TIB/-) to Technical Committee TIB/14, upon which the following bodies were represented: British Cement Association British Plastics Federation British Woodworking Federation Department of the Environment (Building Research Establishment) Department of the Environment (Property Services Agency) European Structural Panel Association Flat Roofing Contractors Advisory Board Furniture Industry Research Association International Cement Bonded Particleboard Federation National Federation of Roofing Contractors National House-building Council Timber Research and Development Association Timber Trade Federation United Kingdom and Ireland Particleboard Association Zurich Municipal Building Guarantee

Amendments issued since publication Amd. No.

Date of issue

6611

March 1991

6947

September 1992

7778

August 1993

8982

August 1996

Comments

Indicated by a sideline in the margin


BS 5669-2:1989

Contents

Committees responsible Foreword 1 2 3 4 5 6 7 8 9 10

Page Inside front cover ii

Scope Definitions Classification Dimensional tolerances Strength, elasticity, swelling, resistance to impact, and extractable formaldehyde content Freedom from foreign matter Moisture content Thermal conductivity Surface spread of flame Marking

1 1 1 1 2 2 2 2 2 2

Appendix A Standard deviation Appendix B Verification of compliance

16 16

Figure 1 — Measurement of length and width of board with profiled edges

2

Table 1 — Summary of mean quality levels for board types C1, C1A, C2, C3(M), C4(M) C5 Table 2 — Summary of dimensional tolerances for board types C1, C1A, C2, C3(M), C4(M) and C5 Table 3 — Manufacturers’ control charts: mean range and control limits for mean and range charts Table 4 — Consumers’ minimum acceptance limits Table 5 — Within-board and between-board standard deviation Publications referred to

© BSI 10-1998

4 9 10 13 16

Inside back cover

i

) c ( , 7 BS 5669-2:1989 0 : 8 0 0 1 0 2 / 3 0 / 3 2 f o s a t c e r r o c n o i s r e V , a r a M i g o l o n k e I T S f B o y t i s r e v i n U , a r a M i g o l o n k e T f o y t i s r e v i n U : y p o c d e s n ii e c i L

Foreword BS 5669 has been prepared under the direction of the Timber Standards Policy Committee. This revision supersedes BS 5669:1979, which is withdrawn. Since BS 5669:1979 was published, the range of particleboards available has continued to grow. The format of the 1979 edition, which covered only four board types, did not permit the expansion necessary to include additional types of particleboard and this revision therefore comprises a series of Parts of BS 5669, as follows. — Part 1: Methods of sampling, conditioning and test; — Part 2: Specification for wood chipboard; — Part 3: Specification for oriented strand board (OSB); — Part 4: Specification for cement bonded particleboard; — Part 5: Code of practice for the selection and application of particleboards for specific purposes. This Part of BS 5669 specifies six types of wood chip-board in terms of their property levels rather than by types of adhesive or wood species used. Four of these were included in the 1979 edition of this st andard while a further two have been added to reflect the continued development of the product . These additional types are C1A wood chipboard based on the recommended levels for chipboard in furniture given in appendix C of BS 5669:1979 (which has also been extended to cover thicker boards which were not included previously) and C5 which is a structural grade of wood chipboard. Since publication of the 1989 edition of this standard, changes in manufacturing methods have resulted in Types C3 and C4 chipboards becoming commercially unavailable. The requirements for C3 and C4 chipboards have therefore been deleted and new grades C3 (M) and C4 (M) have been included. It should be noted that two properties (tensile strength perpendicular to the board after cyclic exposure and increase in thickness after cyclic exposure) of these grades are measured by a new test method (given in an amendment to Part 1 of BS 5669). Protection from insect or fungal attack has not been taken into account in this Part of BS 5669, and where this is required special grades of boards should be specified. Board sizes are not specified in this Part of BS 5669 but where there is a requirement for coordinating sizes, they should be as specified in BS 6750. Density is not a requirement of this Part of BS 5669, but should measurement of density be required the method given in BS 5669-1 should be used. The definition given for particleboard in 2.1 has been replaced by the definition given in clause 2 of BS EN 309:1992. The test methods used in assessing wood chipboard are given in BS 5669-1 and are identical with those used for particleboards specified in BS 5669-3 and BS 5669-4. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations.

Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 16, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. © BSI 10-1998


BS 5669-2:1989

1 Scope This Part of BS 5669 specifies requirements for six types of wood chipboard from 6 mm to 50 mm thickness, classified according to property levels rather than by the types of adhesive or wood species used (see clause 3). Manufacturing requirements covering permitted tolerances on the sizes of boards together with m ean quality levels and marking requirements are specified. Appendix A gives guidance on within-board and between-board standard deviation. Appendix B gives guidance on verifying compliance with this Part of BS 5669. Methods of test for wood chipboard are not included in this Part of BS 5669 but are given in BS 5669-1. Recommendations for the selection and application of the various types of particleboards for specific purposes are given in BS 5669-5. BS 5669 does not cover requirements for extruded particleboard or flaxboard. NOTE The titles of the publications referred to in this standard are listed on the inside back cover.

2 Definitions For the purposes of this Part of BS 5669 the definitions given in BS 6100-4.3 apply except that the definition for particleboard is as given in BS EN 309. For ease of reference, this definition is repeated in 2.1. 2.1 particleboard panel material manufactured under pressure and heat from particles of wood (wood flakes, chips, shavings, saw dust, wafers, strands and similar) and/or other lignocellulosic material in particle form (flax shives, hemp shives, bagasse fragments and similar) with the addition of an adhesive 2.2 wood chipboard particleboard made exclusively from small particles and a binder

3 Classification Six types of wood chipboard are specified in terms of their strength and moisture resistance.

1)

In order to avoid confusion with grade numbers of the other types of particleboard, the six types of wood chipboard carry the prefix “C”. They are designated C1, C1A, C2, C3(M), C4(M) and C5 and are described below. Their mean quality levels, which shall not be used in design calculations without appropriate reduction factors1), are given in Table 1. They are distinguished either by their properties and/or by their intended use as follows. C1. Wood chipboard that is intended for general use. C1A. Wood chipboard that has slightly higher mean quality levels for a number of properties. C2. Wood chipboard that has enhanced mechanical properties. Although such boards are primarily suitable for the loads encountered in joisted or floating floors in domestic applications, they may also be suitable for other applications, depending on design conditions (see BS 5669-5). Unless suitable protection is provided (see BS 5669-5), these boards shall not be used in situations where their moisture content would exceed 18 % for prolonged periods after installation. C3(M). Wood chipboard that has major improvements in moisture resistance2) and increases in mechanical performance over type C1. Such board recovers an acceptable strength on reconditioning after exposure to water and/or high humidity for limited periods. It does not necessarily resist prolonged exposure to weather, attack by micro-organisms or persistent damp conditions. C4(M). Wood chipboard that has the same degree of moisture resistance as C3(M), but with a specified impact resistance. C5. Wood chipboard that has both enhanced moisture resistance properties and enhanced mechanical properties compared with types C3(M) and C4(M) chipboards. It is intended for structural use where full structural design or prototype testing is required.

4 Dimensional tolerances Each board shall be rectangular and shall have straight, square edges. When measured in accordance with clause 7 of BS 5669-1:1989, the appropriate dimensional tolerances given in Table 2 shall apply for each board.

Grade stresses and modification factors for structural wood chipboard are given in BS 5268-2.

2)

The requirements given in Table 1 for resistance of the cyclic test are equivalent to those for the proposed type P5 particleboard specified in EN 312-5 Particleboards — Specifications — Part 5: Requirements for load-bearing boards for use in humid conditions.

© BSI 10-1998

1

) c ( , 7 BS 5669-2:1989 0 : 8 0 0 1 0 2 / 3 NOTE 1 The dimensions of boards are closely related to NOTE Relevant limits for manufacturers’ control charts for all 0 moisture content. If after leaving the factory the moisture types are given in Table 3 and consumers’ acceptance / content increases, the boards will expand. On drying out to the board limits are given in Table 4. 3 moisture content present at dispatch from the factory the The time required to carry out the tests for tensile 2 dimensions may not contract to their original values. For this f strength perpendicular to the plane of the board o reason the measurement of thickness, le ngth, width and flatness after the cyclic test, and for extractable the purpose of verifying compliance with the requirements is s for normally applied at or prior to dispatch from the factory. formaldehyde content is too long to allow these two a NOTE 2 Where boards are provided with special or profiled t edges, for example tongued and grooved, the area of the board is tests to be used in routine quality control c defined by the net length and width of the top face of the board procedures. Manufactures shall therefore measure e these properties at appropriate intervals in order to r r excluding the additional width of the profile as shown in Figure 1. provide assurance of compliance to customers. o c 6 Freedom from foreign matter n o i The boards shall be free from metal and stone s particles which might cause injury to operatives r e and/or excessive damage to woodworking tools. V , 7 Moisture content a r When tested in accordance with clause 9 of a M Figure 1 — Measurement of length and width BS 5669-1:1989 the moisture content of the boards i on leaving the place of manufacture shall be not less of boards with profiled edges g than 5 % and not more than 13 %. o l o 8 Thermal conductivity n 5 Strength, elasticity, swelling, k resistance to impact and extractable When tested in accordance with BS 874-2.1 thermal e I formaldehyde content conductivity shall be not greater than 0.14 W/(m·K). T S f B o The quality of production for each type of wood 9 Surface spread of flame chipboard shall be maintained at such a level that y t i the mean values for the properties given in Table 2 When tested in accordance with BS 476-7, the s r for boards up to 50 mm in thickness, when tested in surface spread of flame on the board shall be not e accordance with BS 5669-1, shall be not inferior to, inferior to that specified for class 3. v or greater than in the case of thickness swelling, the i n mean values given in Table 1 for the type of board. 10 Marking U The strength values given in Table 1, Table 3 Each board shall be clearly and ind elibly marked by , and Table 4 shall not be used for structural design a the manufacturer, either by direct printing or by an r purposes without appropriate reduction factors. adhesive label, with the following information: a a) the number and date of this British Standard, M The variability of quality levels shall be not greater i than is given in Table 3 for each type of board. If, i.e. BS 5669-2:19893); g however, a greater mean value indicates an b) the manufacturer’s name, trade mark or o improvement in quality (other than for thickness l identification mark; o swelling) proportional increases in values of n c) the type of board, i.e. C1, C2, C3(M), C4(M) k between-board standard deviation, B, within-board or C5. e standard deviation w and mean range shall be T permitted. Within-board standard deviation ( w) f and between-board standard deviation ( ) for B o bending strength and modulus of elasticity are y t given in Table 5. i s r e v i n U : y 3) Marking BS 5669-2:1989 on or in relation to a product represents a manufacturer’s declaration o f conformity, i.e. a claim by or p on behalf of the manufacturer that the product meets the requirements of the standard. The accuracy of the claim is therefore o c solely the responsibility of the person making the claim. Such a declaration is not to be confused with third party certification of d conformity, which may also be desirable. e s n 2 © BSI 10-1998 e c i L s

s

s

s


BS 5669-2:1989

In the case of boards of type C1A, the manufact urer shall provide the information given in items (a) to (c) above in the form of a certified document relating to each individual consignment. In addition all boards shall be colour coded at the time of manufacture by applying a coloured stripe t o either the two long or two short edges of the board. The stripes shall be at least 25 mm wide and applied near diagonally opposite corners. The code for each type of board shall be as follows. Type

Code

C1

Black

C1A

Two black stripes, separated by not less than 25 mm

C2

Red

C3(M)

Green

C4(M)

Red and green, separated by not less than 25 mm.

C5

Yellow and green, separated by not less than 25 mm.

© BSI 10-1998

3

n o 4 i s r e V , a r a M i g o l o n k e I T S f B o y t i s r e v i n U , a r a M i g o l o n k e T f o y t i s r e v © i n B I U S 1 : 0 -1 y 9 p 9 o 8 c d e s n e c i L n o i s r e V , a r ©B a S I 1 M 0 i -1 9 g 9 o 8 l o n k e I T S f B o y t i s r e v i n U , a r a M i g o l o n k e T f o y t i s r e v i n U : y p o c d e s n 5 e c i

Table 1 — Summary of mean quality levels for board types C1, C1A, C2, C3(M), C4(M) and C5 Property

Units

Type of board C1

Mean quality level for boards 6 mm thick or less a Bending strength perpendicular to the plane of the board

N/mm2

C2

C3(M)

C4(M)

Method of test in BS 5669-1:1989

C5

–

–

–

–

–

–

–

–

–

–

11.1

0.80

–

–

–

–

–

12.2

%

8

–

–

–

–

–

% %

0.25 7.00

– –

– –

– –

– –

– –

–

–

–

–

–

a

Modulus of elasticity perpendicular to the plane of the board in bending

N/mm2

a

Tensile strength perpendicular to the plane of the board

N/mm2

a

Increase in thickness 1 h after immersion

18.0

C1A

2 000

clause 10

19.2

B S 5 6 6 9 -2 : 1 9 8 9

Changes in length and thickness (65 % r.h to 85 % r.h) length thickness a

Extractable formaldehyde (max.)

mg/100 g

25

clause 20

clause 22

Mean quality levels for board of thickness over 6 mm and up to and including 19 mm a

Bending strength perpendicular to the plane of the board

N/mm2

Modulus of elasticity perpendicular to the plane of the board in bending Tensile strength parallel to the plane of the board

N/mm2 N/mm

13.8

15.2

17.0

19.0

19.0

2 000

2 200

3 000

3 000

3 000

2

–

–

–

–

–

Modulus of elasticity in tension

N/mm2

–

–

–

–

–

Compression strength parallel to the plane of the board

N/mm2

–

–

–

–

–

Modulus of elasticity in compression

N/mm2

–

–

–

–

–

Panel shear strength

N/mm2

–

–

–

–

–

Panel shear modulus

N/mm2

–

–

–

–

–

Transverse shear strength

N/mm2 N/mm

–

–

–

–

–

a

a

Concentrated load strength (per unit thickness)

a

Tensile strength perpendicular to the plane of the board Tensile strength perpendicular to the plane of the board after cyclic exposure Surface soundness

–

– 0.34

N/mm2 N/mm2 N

–

– 0.43

– 0.50

24.0

12.1

2 500

11.2

18.0

24.1

2 750

11.3

9.0

13.1

1 100

13.2

3.2

clause 14

350 0.50

0.28

11.1

11.0

– 0.50

clause 10

3 750

clause 15

0.85

12.2

0.50 b

–

–

1 200

1 380

–

–

–

0.28 –

360

420 470

– –

– –

– –

– –

See NOTE 5 clause 17

Resistance to axial withdrawal of wood screws edge face

N N

–

% % %

– –

clause 18

a

Increase in thickness 1 h after immersion 24 h after immersion after cyclic exposure Changes in length and thickness (65 % r.h. to 85 % r.h.) length thickness

a

Impact strength (per mm thickness) Extractable formaldehyde (max.)

8

% % mm

8 – –

0.25 7.00 –

mg/100 g

7 – –

0.25 7.00

25

25

6 10

0.25 5.00 –

25

–

– 10

0.25 7.00 29

–

6 –

25

5 c 8

0.25 5.00 29

0.20 4.00 34

25

25

19.2 See NOTE 5

} clause 20 clause 21 clause 22


Units C1

Type of board C2 C3(M)

C1A

C4(M)


C5

Mean quality levels for boards of thickness over 19 mm and up to and including 25 mm a


aModulus

of elasticity perpendicular to the plane of the board in bending Tensile strength parallel to the plane of the board Modulus of elasticity in tension Compression strength parallel to the plane of the board Modulus of elasticity in compression Panel shear strength Panel shear modulus Transverse shear strength

aConcentrated

load strength (per unit thickness)

a

Tensile strength perpendicular to the plane of the board Tensile strength perpendicular to the plane of the board after cyclic exposure Surface soundness Resistance to axial withdrawal of wood screws edge face

aIncrease

12.5

14.5

17.0

17.0

19.0

23.0

N/mm2

1 850

2 100

3 000

2 750

3 000

N/mm2

–

–

–

–

–

10.5

N/mm2 N/mm2 N/mm2 N/mm2 N/mm2 N/mm 2 N/mm

– – – – – – –

– – – – – – –

– – – – – – –

– – – – – – –

– – – – – – –

2 400 17.5 2 650 9.0 1 100 2.9 350

N/mm2 N/mm2

0.25 –

0.38

0.50

0.50

0.50

0.25

clause 10

3 600

11.1 12.1 11.2 24.1 11.3 13.1 13.2 clause 14 clause 15

0.80

12.2

0.48 b

–

–

N

1 100

1 380

–

–

–

0.25 –

N N

250 –

420 470

– –

– –

– –

– –

% %

–


} clause 18

in thickness

1 h after immersion 24 h after immersion after cyclic exposure Changes in length and thickness (65 % r.h. to 85 % r.h.) length thickness a

N/mm2


%

8 –

% % mm mg/100 g

8 – –

0.25 7.00 –

6 –

– 0.25 7.00

– 25

7 –

0.25 7.00 29

25

25

6 –

–

5 c

9.5

9.5

8

0.25 5.00

0.25 5.00

0.20 4.00

– 25

} 19.2 See NOTE 5

} clause 20

29

34

clause 21

25

25

clause 22

B S 5 6 6 9 -2 : 1 9 8 9

n o i s r e V , a r ©B a S I 1 M 0 i -1 g 9 8 o 9 l o n k e I T S f B o y t i s r e v i n U , a r a M i g o l o n k e T f o y t i s r e v i n U : y p o c d e s n 5 e c i L n o i 6 s r e V , a r a M i g o l o n k e I T S f B o y t i s r e v i n U , a r a M i g o l o n k e T f o y t i s r e v © i n B I U S 1 : 0 -1 y 9 p 9 8 o c d e s n e c i


Units C1


C1A

C4(M)


C5



aModulus

of elasticity perpendicular to the plane of the board in bending Tensile strength parallel to the plane of the board Modulus of elasticity in tension Compression strength parallel to the plane of the board Modulus of elasticity in compression Panel shear strength Panel shear modulus Transverse shear strength

aConcentrated


a

Tensile strength perpendicular to the plane of the board Tensile strength perpendicular to the plane of the board after cyclic exposure Surface soundness Resistance to axial withdrawal of wood screws edge face

aIncrease

N/mm2

12.5

14.5

17.0

17.0

19.0

23.0

N/mm2

1 850

2 100

3 000

2 750

3 000

N/mm2

–

–

–

–

–

10.5

N/mm2 N/mm2 N/mm2 N/mm2 N/mm2 N/mm 2 N/mm

– – – – – – –

– – – – – – –

– – – – – – –

– – – – – – –

– – – – – – –

2 400 17.5 2 650 9.0 1 100 2.9 350

N/mm2 N/mm2

0.25 –

0.38

0.50

0.50

0.50

0.25

clause 10

3 600

11.1 12.1 11.2 24.1 11.3 13.1 13.2 clause 14 clause 15

0.80

12.2

0.48 b

–

–

N

1 100

1 380

–

–

–

0.25 –

N N

250 –

420 470

– –

– –

– –

– –

% %

–

–

–

%

–

–

–


} clause 18

in thickness

1 h after immersion 24 h after immersion after cyclic exposure Changes in length and thickness (65 % r.h. to 85 % r.h.) length thickness a


8

% %

8

0.25 7.00

mm

–

mg/100 g

7

0.25 7.00

0.25 7.00

– 25

6 –

29 25

6

5

9.5

9.5

8c

0.25 5.00

0.25 5.00

0.20 4.00

–

25

–

–

25

} 19.2 See NOTE 5

} clause 20

29

34

clause 21

25

25

clause 22

B S 5 6 6 9 -2 : 1 9 8 9


Units C1


C1A

C4(M)

C5




N/mm2

10.0

12.5

16.0

14.0

16.0

22.0

clause 10

a

N/mm2

1 500

1 850

2 500

2 100

2 500

3 350

11.1

a

N/mm2 N/mm2 N/mm2 N/mm2 N/mm2 N/mm2 N/mm 2 N/mm

– – – – – – – –

– – – – – – – –

– – – – – – – –

– – – – – – – –

– – – – – – – –

10.0 2 250 17.0 2 600 – – 2.7 350

12.2 11.2 24.1 11.3 13.1 13.2 clause 14 clause 15

Modulus of elasticity perpendicular to the plane of the board in bending Tensile strength parallel to the plane of the board Modulus of elasticity in tension Compression strength parallel to the plane of the board Modulus of elasticity in compression Panel shear strength Panel shear modulus Transverse shear strength Concentrated load strength (per unit thickness)

a

Tensile strength perpendicular to the plane of the board Tensile strength perpendicular to the plane of the board after cyclic exposure Surface soundness Resistance to axial withdrawal of wood screws (face)

a

Increase in thickness 1 h after immersion 24 h after immersion

after cyclic exposure Changes in length and thickness (65 % r.h. to 85 % r.h.) length thickness a


N/mm2 N/mm2 N

0.20 – 1 100

0.32

0.40

–


470

–

–

–

–

clause 18

–

–

%

–

–

–

mg/100 g

8

25

0.45 b

–

–

8

0.25 7.00 – 25

7

6 –

25

6 –

9 0.25 7.00 23

0.22

12.2

–

% %

0.22

0.75

– –

–

0.25 7.00 –

0.40

– 1 380

N

% % mm

0.40

0.25 5.00 – 25

–

5

9

8c

0.25 5.00 23

0.20 4.00 32

25

25

} 19.2 See NOTE 5


B S 5 6 6 9 -2 : 1 9 8 9



Units C1


C1A

C4(M)

C5




N/mm2

10.0

12.5

16.0

14.0

16.0

22.0

clause 10

a

N/mm2

1 500

1 850

2 500

2 100

2 500

3 350

11.1

a

N/mm2 N/mm2 N/mm2 N/mm2 N/mm2 N/mm2 N/mm 2 N/mm

– – – – – – – –

– – – – – – – –

– – – – – – – –

– – – – – – – –

– – – – – – – –

10.0 2 250 17.0 2 600 – – 2.7 350

12.2 11.2 24.1 11.3 13.1 13.2 clause 14 clause 15

Modulus of elasticity perpendicular to the plane of the board in bending Tensile strength parallel to the plane of the board Modulus of elasticity in tension Compression strength parallel to the plane of the board Modulus of elasticity in compression Panel shear strength Panel shear modulus Transverse shear strength Concentrated load strength (per unit thickness)

a

Tensile strength perpendicular to the plane of the board Tensile strength perpendicular to the plane of the board after cyclic exposure Surface soundness Resistance to axial withdrawal of wood screws (face)

a

Increase in thickness 1 h after immersion 24 h after immersion

after cyclic exposure Changes in length and thickness (65 % r.h. to 85 % r.h.) length thickness a


N/mm2 N/mm2 N

0.20 – 1 100

N

–

% %

–

0.32

% % mm

0.45 b –


470

–

–

–

–

clause 18

7 –

–

25

6 –

– 0.25 7.00 –

6

0.25 5.00 –

25

–

– 9

0.25 7.00 23

25

0.22

12.2

–

8

0.22

0.75

–

0.25 7.00 –

mg/100 g

0.40

– –

–

–

0.40

– 1 380

8

%

0.40

25

5 c

9

8

0.25 5.00 23

0.20 4.00 32

25

25

B S 5 6 6 9 -2 : 1 9 8 9

} 19.2 See NOTE 5



Units C1

Mean quality levels for boards of thickness over 32 mm and up to and including 40 mm a Bending strength perpendicular to the plane of the board a Modulus of elasticity perpendicular to the plane of the board in bending Tensile strength parallel to the plane of the board Modulus of elasticity in tension Compression strength in the plane of the board Modulus of elasticity in compression


C1A

C4(M)

C5

N/mm2 N/mm2 N/mm2 N/mm2 N/mm2 N/mm2

8.0 1 200 – – – –

11.0 1 600 – – – –

15.0 2 400 – – – –

12.0 1 800 – – – –

15.0 2 400 – – – –

21.0 3 200 9.5 2 100 16.5 2 500

Panel shear strength Panel shear modulus Transverse shear strength a Concentrated load strength (per unit thickness) a Tensile strength perpendicular to the plane of the board Tensile strength perpendicular to the plane of the board after cyclic exposure Surface soundness Resistance to axial withdrawal of wood screws (face) a Increase in thickness 1 h after immersion 24 h after immersion after cyclic exposure Changes in length and thickness (65 % r.h. to 85 % r.h.) length thickness

N/mm2 N/mm2 N/mm 2 N/mm N/mm2

– – – –

– – – –

– – – –

– – – –

– – – –

9.0 1 100 2.4 350 0.70

a

mm mg/100 g


N/mm2 N N % % %

0.17

0.27

– 1 100 –

– 1 380 470

8

8

–

% %

– 0.25 7.00

–

– – –

0.35

0.25 7.00 25

0.35

0.19 – – 7

–

– 25

0.35

0.25 7.00 20 25

0.19 – –

– –

12.2 See NOTE 5 clause 17 clause 18

} 19.2

8 0.25 5.00

0.20 4.00

} clause 20

6

8 0.25 5.00 25

clause 10 11.1 12.2 11.2 24.1 11.3 13.1 13.2 clause 14 clause 15

5 8c

6

–

0.42 b


20 25

–

30 25

See NOTE 5

clause 21 clause 22

B S 5 6 6 9 -2 : 1 9 8 9

n o i s r e V , a r ©B a S I 1 M 0 i -1 g 9 8 o 9 l o n k e I T S f B o y t i s r e v i n U , a r a M i g o l o n k e T f o y t i s r e v i n U : y p o c d e s n 7 e c i L n o i 8 s r e V , a r a M i g o l o n k e I T S f B o y t i s r e v i n U , a r a M i g o l o n k e T f o y t i s r e v © i n B I U S 1 : 0 -1 y 9 p 9 8 o c d e s n e c i


Units C1

Mean quality levels for boards of thickness over 32 mm and up to and including 40 mm a Bending strength perpendicular to the plane of the board a Modulus of elasticity perpendicular to the plane of the board in bending Tensile strength parallel to the plane of the board Modulus of elasticity in tension Compression strength in the plane of the board Modulus of elasticity in compression


C1A

C4(M)

C5

N/mm2 N/mm2 N/mm2 N/mm2 N/mm2 N/mm2

8.0 1 200 – – – –

11.0 1 600 – – – –

15.0 2 400 – – – –

12.0 1 800 – – – –

15.0 2 400 – – – –

21.0 3 200 9.5 2 100 16.5 2 500

Panel shear strength Panel shear modulus Transverse shear strength a Concentrated load strength (per unit thickness) a Tensile strength perpendicular to the plane of the board Tensile strength perpendicular to the plane of the board after cyclic exposure Surface soundness Resistance to axial withdrawal of wood screws (face) a Increase in thickness 1 h after immersion 24 h after immersion after cyclic exposure Changes in length and thickness (65 % r.h. to 85 % r.h.) length thickness

N/mm2 N/mm2 N/mm 2 N/mm N/mm2

– – – –

– – – –

– – – –

– – – –

– – – –

9.0 1 100 2.4 350 0.70

N/mm2 N N

– 1 100 –

– 1 380 470

8

8

a

mm mg/100 g


% % %

0.17

–

% %

0.27

– 0.25 7.00

–

0.35 – – –

– 0.25 7.00

–

20 25

25

0.35

0.19 – – 7

0.25 7.00

25

0.35

0.42 b

0.19 – –

– –

12.2 See NOTE 5 clause 17 clause 18

} 19.2

8 0.25 5.00

0.20 4.00

} clause 20

6

8 0.25 5.00

–

20 25

25

clause 10 11.1 12.2 11.2 24.1 11.3 13.1 13.2 clause 14 clause 15

5 8c

6

–


30 25

See NOTE 5

clause 21 clause 22

B S 5 6 6 9 -2 : 1 9 8 9


Units C1


C1A

C4(M)

C5


Mean quality levels for boards of thickness over 40 mm and up to and including 50 mm a a

Bending strength perpendicular to the plane of the board Modulus of elasticity perpendicular to the plane of the board in bending

aConcentrated


a

Tensile strength perpendicular to the plane of the board Tensile strength perpendicular to the plane of the board after cyclic exposure Surface soundness Resistance to axial withdrawal of wood screws(face)

6.5

N/mm2 2

N/mm N/mm

10.0

14.0

10.5

14.0

–

clause 10

1 000

1 500

2 200

1 600

2 200

–

11.1

–

–

–

–

–

–

clause 15

0.30

–

12.2

0.15

– – –

See NOTE 5 clause 17 clause 18

6

0.15

N/mm2 N/mm2 N N

– 1 100 –

% % %

– –

0.22 – 1 380 470

0.30 – – –

0.30 0.15 – –

– –

a


a


a

To be assessed for quality control.

b

No mean value for individual board to be less than this figure. No mean value for individual board to exceed this figure.

c

8

% % mm mg/100 g

8 – –

0.25 7.00 –

0.25 7.00 –

25

7 – –

25

6 8

8

– – –

0.25 5.00

0.25 5.00

– –

–

0.25 7.00 17 25

–

– 25

17 25

– –

}

19.2 See NOTE 5


NOTE 1 The strength and elasticity values are not suitable for structural design purposes without appropriate reduction factors (see clause 3). NOTE 2 Impact values for boards less than 6 mm thick vary considerably with the thickness of the board, and the methods described in clause 21 of BS 5669-1:1989 might not be appropriate to all thicknesses. NOTE 3 Type C2 and C4(M) boards are not normally available in nominal thicknesses of less than 18 mm. NOTE 4 The limits for increase in thickness are the maximum values. NOTE 5 For types C3(M) and C4(M) boards the values for both tensile strength perpendicular to the plane of the board after cyclic exposure, and increase in thickness after cyclic exposure, shall be determined in accordance with clause 27 of BS 5669-1:1989. For type C5 board they shall be determined in accordance with clauses 16.1 and 16.2 of BS 5669-1:1989 respectively.

B S 5 6 6 9 -2 : 1 9 8 9



Units C1


C1A

C4(M)

C5


Mean quality levels for boards of thickness over 40 mm and up to and including 50 mm a a

Bending strength perpendicular to the plane of the board Modulus of elasticity perpendicular to the plane of the board in bending

aConcentrated


a

Tensile strength perpendicular to the plane of the board Tensile strength perpendicular to the plane of the board after cyclic exposure Surface soundness Resistance to axial withdrawal of wood screws(face)

6.5

N/mm2 2

N/mm N/mm

10.0

14.0

10.5

14.0

–

clause 10

1 000

1 500

2 200

1 600

2 200

–

11.1

–

–

–

–

–

–

clause 15

0.30

–

12.2

0.15

– – –

See NOTE 5 clause 17 clause 18

6

0.15

N/mm2 N/mm2 N N

– 1 100 –

% % %

– –

0.22 – 1 380 470

0.30 – – –

0.30 0.15 – –

– –

B S 5 6 6 9 -2 : 1 9 8 9

a


a


a

To be assessed for quality control.

b

No mean value for individual board to be less than this figure. No mean value for individual board to exceed this figure.

c

8

% %

8 – –

0.25 7.00

mm mg/100 g

–

25

6 8

8

– – –

0.25 5.00

0.25 5.00

– –

–

0.25 7.00 –

25

7 – –

–

0.25 7.00 17 25

–

17 25

25

}

19.2 See NOTE 5

} clause 20

– –

clause 21 clause 22

NOTE 1 The strength and elasticity values are not suitable for structural design purposes without appropriate reduction factors (see clause 3). NOTE 2 Impact values for boards less than 6 mm thick vary considerably with the thickness of the board, and the methods described in clause 21 of BS 5669-1:1989 might not be appropriate to all thicknesses. NOTE 3 Type C2 and C4(M) boards are not normally available in nominal thicknesses of less than 18 mm. NOTE 4 The limits for increase in thickness are the maximum values. NOTE 5 For types C3(M) and C4(M) boards the values for both tensile strength perpendicular to the plane of the board after cyclic exposure, and increase in thickness after cyclic exposure, shall be determined in accordance with clause 27 of BS 5669-1:1989. For type C5 board they shall be determined in accordance with clauses 16.1 and 16.2 of BS 5669-1:1989 respectively.


Units C1

C1A


C4(M)

C5


Dimensional tolerances for boards 6 mm to 25 mm in thickness a

Length and width (nominal) unless specified as in clause 4

mm

± 5 mm on the no minal le ngth an d wi dth

a

Thickness (mean) unsanded sanded

mm mm

± 0.8 ± 0.4

± 0.8 ± 0.3

± 0.8 ± 0.4

± 0.8 ± 0.4

± 0.8 ± 0.4

± 0.8 ± 0.4

Thickness (at any point on the board) unsanded sanded

mm mm

± 1.0 ± 0.3

± 1.0 ± 0.2

± 1.0 ± 0.3

± 1.0 ± 0.3

± 1.0 ± 0.3

± 1.0 ± 0.3

Edge straightness Squareness

mm/mm mm/mm

1 per 1 000 2 per 1 000

Flatness: boards 15 mm in thickness or greater

mm

a

–

7.1

      

for all types for all types 1.0 in 600

–

–

7.2

7.3 7.4 –

–

7.5

Dimensional tolerance for boards 26 mm to 50 mm in thickness a


mm


a


mm mm

± 1.0 ± 0.5

± 1.0 ± 0.5

± 1.0 ± 0.5

± 1.0 ± 0.5

± 1.0 ± 0.5

± 1.0 ± 0.5


mm mm

± 1.0 ± 0.3

± 1.0 ± 0.2

± 1.0 ± 0.3

± 1.0 ± 0.3

± 1.0 ± 0.3

± 1.0 ± 0.3


mm/mm mm/mm

1 per 1 000 2 per 1 000


mm

a

– a

7.1

      


–

–

7.2

7.3 7.4 –

–

7.5

See note 1 to clause 4

B S 5 6 6 9 -2 : 1 9 8 9

n o i s r e V , a r ©B a S I 1 M 0 i -1 g 9 8 o 9 l o n k e I T S f B o y t i s r e v i n U , a r a M i g o l o n k e T f o y t i s r e v i n U : y p o c d e s n 9 e c i L n o i 1 s r 0 e V , a r a M i g o l o n k e I T S f B o y t i s r e v i n U , a r a M i g o l o n k e T f o y t i s r e v © i n B I U S 1 : 0 -1 y 9 p 9 8 o c d e s n e c i


Units C1

C1A


C4(M)


C5

Dimensional tolerances for boards 6 mm to 25 mm in thickness a


mm


a


mm mm

± 0.8 ± 0.4

± 0.8 ± 0.3

± 0.8 ± 0.4

± 0.8 ± 0.4

± 0.8 ± 0.4

± 0.8 ± 0.4


mm mm

± 1.0 ± 0.3

± 1.0 ± 0.2

± 1.0 ± 0.3

± 1.0 ± 0.3

± 1.0 ± 0.3

± 1.0 ± 0.3


mm/mm mm/mm

1 per 1 000 2 per 1 000


mm

a

      


–

7.1

–

7.2

7.3 7.4

–

–

–

7.5

Dimensional tolerance for boards 26 mm to 50 mm in thickness a


mm


a


mm mm

± 1.0 ± 0.5

± 1.0 ± 0.5

± 1.0 ± 0.5

± 1.0 ± 0.5

± 1.0 ± 0.5

± 1.0 ± 0.5


mm mm

± 1.0 ± 0.3

± 1.0 ± 0.2

± 1.0 ± 0.3

± 1.0 ± 0.3

± 1.0 ± 0.3

± 1.0 ± 0.3


mm/mm mm/mm

1 per 1 000 2 per 1 000


mm

a

a

      


–

7.1

–

7.2

7.3 7.4

–

–

–

7.5

See note 1 to clause 4

B S 5 6 6 9 -2 : 1 9 8 9

Table 3 — Manufacturers’ control charts: mean range and control limits for mean and range charts (a) types C1, C1A and C2 Property

Units

C1 Mean range, w

Limits for sample mean, x

C1A Upper limits for range, w

Mean range, w

C2


Upper limits for range, w

Mean range, w



Upto 6 mm Bending strength Modulus of elasticity Tensile strength perpendicular to the plane of the board Thickness swelling 1 h after immersion

N/mm2 N/mm2 N/mm2 %

2.5 250 0.25 0.9

13.7 1 570 0.37 10

N/mm2 N/mm2 N/mm2 % mm

2.5 250 0.08 1.0 –

9.5 1 570 0.21 10 –


2.5 250 0.08 1.0 –


5.4 540 0.54 1.8

– – – –

– – – –

– – – –

– – – –

– – – –

– – – –

5.4 540 0.18 2.2 –

2.5 250 0.10 1.0 –

10.9 1 770 0.26 10 –

5.4 540 0.22 2.2 –

2.5 340 0.12 1.0 2.5

12.7 2 370 0.29 9 22.6

5.4 740 0.26 2.2 5.3

8.2 1 420 0.12 10 –

5.4 540 0.18 2.2 –

2.5 250 0.10 1.0 –

10.2 1 670 0.21 10 –

5.4 540 0.22 2.2 –

2.5 340 0.12 1.0 2.5

12.7 2 370 0.29 9 22.6

5.4 740 0.26 2.2 5.3

2.0 200 0.08 1.0 –

6.6 1 170 0.07 10 –

4.3 430 0.18 2.2 –

2.5 250 0.08 1.0 –

8.2 1 420 0.18 10 –

5.4 540 0.18 2.2 –

2.5 300 0.12 1.0 1.9

11.7 1 950 0.19 9 18.3

5.4 650 0.26 2.2 4.2


2.0 150 0.08 1.0 –

4.6 940 0.04 10

4.3 325 0.18 2.2 –

2.5 250 0.08 1.0 –

6.7 1 170 0.13 10 –

5.4 540 0.18 2.2 –

2.5 300 0.12 1.0 1.7

10.7 1 850 0.14 9 15.9

5.4 650 0.26 2.2 3.7


2.0 150 0.08 1.0 –

3.1 730 0.02 10

4.3 325 0.18 2.2 –

2.5 250 0.08 1.0 –

5.7 1 070 0.08 10 –

5.4 540 0.18 2.2 –

2.5 300 0.12 1.0 1.4

9.7 1 630 0.09 9 13.5

5.4 650 0.26 2.2 3.1

Over 6 mm up to 19 mm Bending strength Modulus of elasticity Tensile strength perpendicular to the plane of the board Thickness swelling 1 h after immersion Impact strength (per mm thickness) Over 19 mm up to 25 mm Bending strength Modulus of elasticity Tensile strength perpendicular to the plane of the board Thickness swelling 1 h after immersion Impact strength (per mm thickness) Over 25 mm up to 32 mm Bending strength Modulus of elasticity Tensile strength perpendicular to the plane of the board Thickness swelling 1 h after immersion Impact strength (per mm thickness) Over 32 mm up to 40 mm Bending strength Modulus of elasticity Tensile strength perpendicular to the plane of the board Thickness swelling 1 h after immersion Impact strength (per mm thickness)

–

Over 40 mm to 50 mm Bending strength Modulus of elasticity Tensile strength perpendicular to the plane of the board Thickness swelling 1 h after immersion Impact strength (per mm thickness) NOTE

The limits for thickness swelling are the maximum values.

–

B S 5 6 6 9 -2 : 1 9 8 9

n o 1 i s r 0 e V , a r a M i g o l o n k e I T S f B o y t i s r e v i n U , a r a M i g o l o n k e T f o y t i s r e v © i n B I U S 1 : 0 -1 y 9 p 9 o 8 c d e s n e c i L

) c ( , 7 0 : 8 0 0 1 0 2 / 3 0 / 3 2 f o s a t c e r r o c n o i s r e V , a r a M i g o l o n k e I

B S 5 6 6 9 -2 : 1 9 8 9

Table 3 — Manufacturers’ control charts: mean range and control limits for mean and range charts (a) types C1, C1A and C2 Property

Units

C1 Mean range, w

C1A



Mean range, w

C2



Mean range, w



Upto 6 mm Bending strength Modulus of elasticity Tensile strength perpendicular to the plane of the board Thickness swelling 1 h after immersion

N/mm2 N/mm2 N/mm2 %

2.5 250 0.25 0.9

13.7 1 570 0.37 10


2.5 250 0.08 1.0 –

9.5 1 570 0.21 10 –


2.5 250 0.08 1.0 –


5.4 540 0.54 1.8

– – – –

– – – –

– – – –

– – – –

– – – –

– – – –

5.4 540 0.18 2.2 –

2.5 250 0.10 1.0 –

10.9 1 770 0.26 10 –

5.4 540 0.22 2.2 –

2.5 340 0.12 1.0 2.5

12.7 2 370 0.29 9 22.6

5.4 740 0.26 2.2 5.3

8.2 1 420 0.12 10 –

5.4 540 0.18 2.2 –

2.5 250 0.10 1.0 –

10.2 1 670 0.21 10 –

5.4 540 0.22 2.2 –

2.5 340 0.12 1.0 2.5

12.7 2 370 0.29 9 22.6

5.4 740 0.26 2.2 5.3

2.0 200 0.08 1.0 –

6.6 1 170 0.07 10 –

4.3 430 0.18 2.2 –

2.5 250 0.08 1.0 –

8.2 1 420 0.18 10 –

5.4 540 0.18 2.2 –

2.5 300 0.12 1.0 1.9

11.7 1 950 0.19 9 18.3

5.4 650 0.26 2.2 4.2


2.0 150 0.08 1.0 –

4.6 940 0.04 10

4.3 325 0.18 2.2 –

2.5 250 0.08 1.0 –

6.7 1 170 0.13 10 –

5.4 540 0.18 2.2 –

2.5 300 0.12 1.0 1.7

10.7 1 850 0.14 9 15.9

5.4 650 0.26 2.2 3.7


2.0 150 0.08 1.0 –

3.1 730 0.02 10

4.3 325 0.18 2.2 –

2.5 250 0.08 1.0 –

5.7 1 070 0.08 10 –

5.4 540 0.18 2.2 –

2.5 300 0.12 1.0 1.4

9.7 1 630 0.09 9 13.5

5.4 650 0.26 2.2 3.1

Over 6 mm up to 19 mm Bending strength Modulus of elasticity Tensile strength perpendicular to the plane of the board Thickness swelling 1 h after immersion Impact strength (per mm thickness) Over 19 mm up to 25 mm Bending strength Modulus of elasticity Tensile strength perpendicular to the plane of the board Thickness swelling 1 h after immersion Impact strength (per mm thickness) Over 25 mm up to 32 mm Bending strength Modulus of elasticity Tensile strength perpendicular to the plane of the board Thickness swelling 1 h after immersion Impact strength (per mm thickness) Over 32 mm up to 40 mm Bending strength Modulus of elasticity Tensile strength perpendicular to the plane of the board Thickness swelling 1 h after immersion Impact strength (per mm thickness)

–


–


BS 5669-2:1989

Table 3 — Manufacturers’ control charts: mean range and control limits for mean and range charts (b) Types C3(M) and C4(M) Property

Units

C3(M) Mean range, w


C4(M) Upper limits for range, w

Mean range, w

5.4 740

2.5 340



Over 6 mm up to 19 mm Bending strength Modulus of elasticity Tensile strength perpendicular to the plane of the board Thickness swelling 1 h after immersion Impact strength (per mm thickness)

N/mm2 N/mm2

2.5 340

14.7 2 370

N/mm2 % mm

–

–

–

N/mm 2 N/mm2

2.5 320

12.7 2 150

5.4 695

0.12 1.0

0.29 8

0.26 2.2

0.12 1.0 2.5

14.7 2 370 0.29 8 22.6

5.4 740 0.26 2.2 5.3


N/mm2 % mm

–

–

–

N/mm 2 N/mm2

2.5 250

9.7 1 620

5.4 540

0.12 1.0

0.29 8

0.26 2.2

2.5 340 0.12 1.0 2.5

14.7 2 370 0.29 8 22.6

5.4 740 0.26 2.2 5.3

Over 25 mm up to 32 mm Bending strength Modulus of elasticity Tensile strength perpendicular to the

2.5 300

11.7 1 930

5.4 650


BS 5669-2:1989

Table 3 — Manufacturers’ control charts: mean range and control limits for mean and range charts (b) Types C3(M) and C4(M) Property

Units

C3(M) Mean range, w


C4(M) Upper limits for range, w

Mean range, w

5.4 740

2.5 340




N/mm2 N/mm2

2.5 340

14.7 2 370

N/mm2 % mm

–

–

–

N/mm 2 N/mm2

2.5 320

12.7 2 150

5.4 695

0.12 1.0

0.29 8

0.26 2.2

0.12 1.0 2.5

14.7 2 370 0.29 8 22.6

5.4 740 0.26 2.2 5.3


N/mm2 % mm

–

–

–

N/mm 2 N/mm2

2.5 250

9.7 1 620

5.4 540

0.12 1.0

0.29 8

0.26 2.2

2.5 340 0.12 1.0 2.5

14.7 2 370 0.29 8 22.6

5.4 740 0.26 2.2 5.3


N/mm2 % mm

–

–

–

N/mm 2 N/mm2

2.5 250

7.7 1 320

5.4 540

0.12 1.0

0.19 8

0.26 2.2

2.5 300 0.12 1.0 1.9

11.7 1 930 0.19 8 18.3

5.4 650 0.26 2.2 4.2


N/mm2 % mm

–

–

–

N/mm 2 N/mm2

2.5 250

6.2 1 120

5.4 540

0.12 1.0

0.14 8

0.26 2.2

2.5 300 0.12 1.0 1.7

10.7 1 830 0.14 8 15.9

5.4 650 0.26 2.2 3.7


N/mm2 % mm

0.12 1.0 –

0.09 8 –

0.26 2.2 –

2.5 300 0.12 1.0 1.4

9.7 1 630 0.09 8 13.5

5.4 650 0.26 2.2 3.1


© BSI 10-1998

11

) c ( , 7 BS 5669-2:1989 0 : 8 0 0 1 0 2 / 3 Table 3 — Manufacturers’ control charts: mean range and control limits for mean 0 / and range charts 3 2 (c) Type C5 f Property Units Mean Limits for Upper o range, w sample limits for s means, x range, w a t Boards of thickness over 6 mm and up to and c including 19 mm e Bending strength N/mm 2 3.0 18.9 6.5 r 2 r Modulus of elasticity N/mm 380 3 100 820 o Concentrated load strength N/mm 30 284 65 c 2 Tensile strength perpendicular to the plane of the board N/mm 0.14 0.58 0.31 n Thickness swelling 24 h after immersion % 0.9 6.6 1.8 o i Impact strength (per mm thickness) mm 2.9 27.1 6.2 s r Boards of thickness over 19 mm and up to and e including 25 mm V Bending strength N/mm 2 2.9 18.1 6.3 , Modulus of elasticity 2 N/mm 360 2 920 780 a r Concentrated load strength N/mm 30 284 65 a Tensile strength perpendicular to the plane of the board 2 N/mm 0.14 0.58 0.21 M Thickness swelling 24 h after immersion % 0.9 6.6 1.8 i Impact strength (per mm thickness) mm 2.9 27.1 6.2 g o Boards of thickness over 25 mm and up to and l o including 32 mm N/mm 2 2.8 17.3 6.0 n Bending strength k Modulus of elasticity N/mm2 340 2 720 730 e IConcentrated load strength N/mm 30 284 65 T S Tensile strength perpendicular to the plane of the board N/mm2 0.13 0.51 0.27 f B % 0.9 6.6 1.8 o Thickness swelling 24 h after immersion Impact strength (per mm thickness) mm 2.7 25.5 5.9 y t i Boards of thickness over 32 mm and up to and s r including 40 mm N/mm 2 2.7 16.5 5.7 e Bending strength v N/mm2 320 2 590 700 i Modulus of elasticity n Concentrated load strength N/mm 30 284 65 U Tensile strength perpendicular to the plane of the board N/mm2 0.12 0.48 0.26 , Thickness swelling 24 h after immersion % 0.9 6.6 1.8 a mm 2.5 23.9 5.5 r Impact strength (per mm thickness) a NOTE The limits for thickness swelling are the maximum values. M i g o l o n k e T f o y t i s r e v i n U : y p o c d e s n 12 © BSI 10-1998 e c i L

n o i s r e V , a r ©B a S I 1 M 0 i -1 g 9 8 o 9 l o n k e I T S f B o y t i s r e v i n U , a r a M i g o l o n k e T f o y t i s r e v i n U : y p o c d e s 1 n 3 e c i L n o i 1 s r 4 e V , a r a M i g o l o n k e I T S f B o y t i s r e v i n U , a r a M i g o l o n k e T f o y t i s r e v © i n B I U S 1 : 0 -1 y 9 p 9 8 o c d e s n e c i

Table 4 — Consumers’ minimum acceptance limits (a) Types C1, C1/A, C2, C3(M) and C4(M) Property

Units

Limit for sample means for thickness complying with this Part of BS 5669a Type C1

Type C1A

Type C2

Type C3(M)


Type C4(M)

Board 6 mm thick or less Be ndi ng stre ngth pe rpe ndi cul ar to the p lane of the bo ard Modulus of elasticity perpendicular to the plane of the board in bending Tensile strength perpendicular to the plane of the board Increase in thickness 1 h after immersion Extractable formaldehyde (max.)

N/mm2 17.2 N/mm2 1 920 N/mm2 0.72 % 8.4 mg/100 g 25

Not specified

Not specified

Not specified

clause 10 11.1 12.2

Not specified

clause 22

Boards of thickness over 6 mm and up to and including 19 mm Be ndi ng stre ngth pe rpe ndi cul ar to the p lane of the bo ard Modulus of elasticity perpendicular to the plane of the board in bending Tensile strength perpendicular to the plane of the board Tensile strength perpendicular to the plane of the board after cyclic exposure Surface soundness Resistance to axial withdrawal of wood screws edge face Increase in thickness 1 h after immersion after cyclic exposure Impact strength (per mm thickness) Extractable formaldehyde (max.)

N/mm2 N/mm2 N/mm2 N/mm2

13.0 1 920 0.32 –

14.4 2 120 0.40 –

16.2 2 880 0.46 –

18.2 2 880 0.46 0.28

18.2 2 880 0.46 0.28

clause 10 11.1 12.2 clause 27 clause 17

N

1 020

1 300

–

–

–

N N

335 –

400 450

– –

– –

– –

% 8.4 % – mm – mg/100 g 25

– –

8.4

7.4

N/mm2 N/mm2 N/mm2 N/mm2 N

11.7 1 770 0.23 – 1 020

13.7 2 020 0.35 – 1 300

N N

230 –

400 450

6.4 10

– 27.9 25

25

}clause 18

6.4 10 27.9 25

– 25

19.2 clause 27 clause 21 clause 22

Boards of thickness over 19 mm and up to and including 25 mm Be ndi ng stre ngth pe rpe ndi cul ar to the p lane of the bo ard Modulus of elasticity perpendicular to the plane of the board in bending Tensile strength perpendicular to the plane of the board Tensile strength after cyclic exposure Surface soundness Resistance to axial withdrawal of wood screws edge face Increase in thickness 1 h after immersion after cyclic exposure Impact strength (per mm thickness) Extractable formaldehyde (max.)

% 8.4 % – mm – mg/100 g 25

16.2 2 880 0.46 – –

16.2 2 640 0.46 0.25 –

18.2 2 880 0.46 0.25 –

– –

– –

– –

8.4

7.4

– –

6.4 9.5

– 27.9 25

25

10.1 11.1 12.2 clause 27 clause 17

}clause 18

6.4 9.5 27.9 25

– 25

19.2 clause 27 clause 21 clause 22

a

Values given apply only to consignment(s) un der test and when sampled in accordance wi th clause 3 of BS 5669-1:1989.

Table 4 (a) — Consumers’ minimum acceptance limits Property

Units


Type C1A

Type C2

Type C3(M) Type C4(M)

Boards of thickness over 25 mm and up to and including 32 mm Bending strength perpendicular to the plane of the board Modulus of elasticity perpendicular to the plane of the board in bending Tensile strength perpendicular to the plane of the board Tensile strength perpendicular to the plane of the board after cyclic exposure Surface soundness Resistance to axial withdrawal of wood screws edge face


9.4 1 440 0.18 – 1 020

N N

–

Increase in thickness 1 h after immersion after cyclic exposure Impact strength (per mm thickness) Extractable formaldehyde (max.)

% 8.4 % – mm – mg/100 g 25

– –

10.2 1 520 0.25 – 1 300

14.2 2 300 0.31 – –

11.4 1 710 0.31 0.19 –

14.2 2 300 0.31 0.19 –

–

– –

– –

– –

185

11.7 1 770 0.30 – 1 300

15.2 2 400 0.36 – –

13.2 2 000 0.36 0.22 –

15.2 2 400 0.36 0.22 –

–

– –

– –

– –

450 8.4

7.4

6.4 9

– 22.1 25

25

6.4 9 22.1 25

– 25


7.4 1 160 0.15 – 1 020

N N

–


% 8.4 % – mm – mg/100 g 25

– – 25

19.2 25


– 1 020

9.4 1 440 0.20 – 1 300

13.2 2 100 0.26 – –

10.0 1 510 0.26 0.15 –

13.2 2 100 0.26 0.15 –

N N

– –

–

– –

– –

– –

Boards of thickness over 40 mm and up to 50 mm Bending strength perpendicular to the plane of the board Modulus of elasticity perpendicular to the plane of the board in bending Tensile strength perpendicular to the plane of the board Tensile strength perpendicular to the plane of the board after cyclic exposure Surface soundness Resistance to axial withdrawal of wood screws edge face Increase in thickness 1 h after immersion after cyclic exposure Impact strength (per mm thickness) Extractable formaldehyde (max.) a

450

5.9 950 0.13

% 8.4 % – mm – mg/100 g 25

8.4

7.4

6.4 8.0

–

450 8.4 – –

25

7.4

6.4 8.0

25

16.4 25


– 25


} clause 18 19.2 clause 27 clause 21 clause 22 clause 10 11.1 12.2 clause 27 clause 17

6.4 8.0 16.4 25

}clause 18 19.2 clause 27 clause 17 clause 22

6.4 8.0 19.2 25

–

–



135


} clause 18 19.2 clause 27 clause 21 clause 22

B S 5 6 6 9 -2 : 1 9 8 9

B S 5 6 6 9 -2 : 1 9 8 9

n o 1 i s r 4 e V , a r a M i g o l o n k e I T S f B o y t i s r e v i n U , a r a M i g o l o n k e T f o y t i s r e v © i n B I U S 1 : 0 -1 y 9 p 9 o 8 c d e s n e c i L n o i s r e V , a r ©B a S I 1 M 0 i -1 9 g 9 o 8 l o n k e I T S f B o y t i s r e v i n U , a r a M i g o l o n k e T f o y t i s r e v i n U : y p o c d e s 1 n 5 e c i

Table 4 (a) — Consumers’ minimum acceptance limits Property

Units


Type C1A

Type C2

Type C3(M) Type C4(M)



9.4 1 440 0.18 – 1 020

N N

–


% 8.4 % – mm – mg/100 g 25

– –

10.2 1 520 0.25 – 1 300

14.2 2 300 0.31 – –

11.4 1 710 0.31 0.19 –

14.2 2 300 0.31 0.19 –

–

– –

– –

– –

185

11.7 1 770 0.30 – 1 300

15.2 2 400 0.36 – –

13.2 2 000 0.36 0.22 –

15.2 2 400 0.36 0.22 –

–

– –

– –

– –

450 8.4

7.4

6.4 9

– 22.1 25

25

6.4 9 22.1 25

– 25


7.4 1 160 0.15 – 1 020

N N

–


% 8.4 % – mm – mg/100 g 25

– – 25

19.2 25


– 1 020

9.4 1 440 0.20 – 1 300

13.2 2 100 0.26 – –

10.0 1 510 0.26 0.15 –

13.2 2 100 0.26 0.15 –

N N

– –

–

– –

– –

– –

Boards of thickness over 40 mm and up to 50 mm Bending strength perpendicular to the plane of the board Modulus of elasticity perpendicular to the plane of the board in bending Tensile strength perpendicular to the plane of the board Tensile strength perpendicular to the plane of the board after cyclic exposure Surface soundness Resistance to axial withdrawal of wood screws edge face Increase in thickness 1 h after immersion after cyclic exposure Impact strength (per mm thickness) Extractable formaldehyde (max.)

450

5.9 950 0.13

% 8.4 % – mm – mg/100 g 25

8.4

7.4

6.4 8.0

–

450 8.4 – –

25

7.4

6.4 8.0

25

16.4 25


– 25

} clause 18 19.2 clause 27 clause 21 clause 22 clause 10 11.1 12.2 clause 27 clause 17

6.4 8.0 16.4 25

}clause 18 19.2 clause 27 clause 17 clause 22

6.4 8.0 19.2 25

–

–



135


B S 5 6 6 9 -2 : 1 9 8 9

} clause 18 19.2 clause 27 clause 21 clause 22

a


Table 4 — Consumers’ minimum acceptance limits (b) Type C5 Property

Be ndi ng stre ngth pe rpe ndi cul ar to the p lane of the bo ard

Units

N/mm2

Modulus of elasticity perpendicular to the plane of the board in bending N/mm2

Limit for sample means for thickness complying with this Part of BS 5669a

Method of test in 6 mm to 19 mm 19 mm to 25 mm 25 mm to 32 mm 32 mm to 40 mm BS 5669-1:1989 23.1 3 610

22.1 3 480

21.1 3 240

20.2

clause 10

3 090

11.1


N/mm2


N/mm2

Compression strength in the plane of the board

N/mm2


N/mm2


N/mm2

Panel shear modulus

N/mm2


N/mm 2


N/mm


N/mm2

0.80

0.75

0.71

0.66

12.2

Tensile strength after cyclic treatment

N/mm2

0.50

0.48

0.45

0.42

16.1 19.2

10.4 2 410 17.2 2 650 8.7 1 060 3.0 340

10.1 2 320

9.5 2 170

16.7 2 550 8.7 1 060 2.8 340

9.1

16.2

11.2

15.7

2 510

2 410

–

–

–

–

–

– 340

12.2

2 030

24.1 11.3

13.1 13.2 clause 14

340

clause 15

Increase in thickness swelling 24 h after immersion

%

5.4

5.4

5.4

5.4

after cyclic treatment (max.)

%

8.0

8.0

8.0

8.0

16.2

Impact strength (per mm thickness)

mm

32.7

32.7

30.8

28.9

clause 21


mg/100 g

25

25

25

25

clause 22

a

Values given above apply only to the consignme nt(s) under test and when sampled in accordance with clause 3 of BS 5669-1:1989.

NOTE

The limits for increase in thickness are the maximum values.

B S 5 6 6 9 -2 : 1 9 8 9

n o i s r e V , a r ©B a S I 1 M 0 i -1 g 9 8 o 9 l o n k e I T S f B o y t i s r e v i n U , a r a M i g o l o n k e T f o y t i s r e v i n U : y p o c d e s 1 n 5 e c i L

Table 4 — Consumers’ minimum acceptance limits (b) Type C5 Property

Units

N/mm2

Be ndi ng stre ngth pe rpe ndi cul ar to the p lane of the bo ard

Modulus of elasticity perpendicular to the plane of the board in bending N/mm2

Limit for sample means for thickness complying with this Part of BS 5669a

Method of test in 6 mm to 19 mm 19 mm to 25 mm 25 mm to 32 mm 32 mm to 40 mm BS 5669-1:1989 23.1 3 610

22.1

21.1

3 480

20.2

3 240

clause 10

3 090

11.1


N/mm2


N/mm2

Compression strength in the plane of the board

N/mm2


N/mm2


N/mm2

Panel shear modulus

N/mm2


N/mm 2


N/mm


N/mm2

0.80

0.75

0.71

0.66

12.2

Tensile strength after cyclic treatment

N/mm2

0.50

0.48

0.45

0.42

16.1 19.2

10.4 2 410

10.1

9.5

2 320

17.2 2 650

2 170

16.7

1 060

8.7 1 060

3.0 340

2.8 340

12.2

2 030

16.2

2 550

8.7

9.1

11.2

15.7

2 510

2 410

–

–

–

–

–

– 340

24.1 11.3

13.1 13.2 clause 14

340

clause 15

Increase in thickness swelling 24 h after immersion

%

5.4

5.4

5.4

5.4

after cyclic treatment (max.)

%

8.0

8.0

8.0

8.0

16.2

Impact strength (per mm thickness)

mm

32.7

32.7

30.8

28.9

clause 21


mg/100 g

25

25

25

25

clause 22

a

Values given above apply only to the consignme nt(s) under test and when sampled in accordance with clause 3 of BS 5669-1:1989.

NOTE

The limits for increase in thickness are the maximum values.

B S 5 6 6 9 -2 : 1 9 8 9

) c ( , 7 BS 5669-2:1989 0 : 8 0 0 1 0 2 / 3 Appendix A Standard deviation Appendix B Verification of compliance 0 / Where verification of compliance is required, a 3 Table 5 gives guidance on within-board standard 2 deviation ( w) and between-board standard declaration that the boards comply with t his Part of f deviation ( ) for bending strength and modulus of BS 5669 should be supported by one of the following: B o elasticity. a) reference to process/quality control test records s NOTE Grade stresses and moduli for type C5 wood chipboard a and/or quality control charts illustrating the t are given in BS 5268-2. testing frequency and process variability c (see BS 5701 and BS 2564); e r r NOTE 1 Compliance with clauses 8 and 9 may be o established by a test certificate from an accredited c laboratory. n b) reference to the manufacturer’s certificate of o i compliance with this Part of BS 5669; s r NOTE 2 This is normally provided at the request of the e purchaser. V c) reference to a third party certificate of , compliance with the requirements in Table 4 a r when sampled in accordance with clause 3 of a BS 5669-1:1989. M Table 5 — Within-board and between-board standard deviation i g Type C1 Type C1A Type C2 Type C3(M) Type C4(M) o Property l B w B w B w B w B w o 0 mm to 6 mm n 1.5 2.0 – – – – – – – – k Bending strength 150 200 – – – – – – – – e IModulus of elasticity s s

s

s

s

s

s

s

s

s

s

s

) c ( , 7 BS 5669-2:1989 0 : 8 0 0 1 0 2 / 3 Appendix A Standard deviation Appendix B Verification of compliance 0 / Where verification of compliance is required, a 3 Table 5 gives guidance on within-board standard 2 deviation ( w) and between-board standard declaration that the boards comply with t his Part of f deviation ( ) for bending strength and modulus of BS 5669 should be supported by one of the following: B o elasticity. a) reference to process/quality control test records s a NOTE Grade stresses and moduli for type C5 wood chipboard and/or quality control charts illustrating the t are given in BS 5268-2. testing frequency and process variability c (see BS 5701 and BS 2564); e r r NOTE 1 Compliance with clauses 8 and 9 may be o established by a test certificate from an accredited c laboratory. n b) reference to the manufacturer’s certificate of o i compliance with this Part of BS 5669; s r NOTE 2 This is normally provided at the request of the e purchaser. V c) reference to a third party certificate of , compliance with the requirements in Table 4 a r when sampled in accordance with clause 3 of a BS 5669-1:1989. M Table 5 — Within-board and between-board standard deviation i g Type C1 Type C1A Type C2 Type C3(M) Type C4(M) o Property l B w B w B w B w B w o 0 mm to 6 mm n 1.5 2.0 – – – – – – – – k Bending strength I Modulus of elasticity 150 200 – – – – – – – – e T S f B 6 mm to 19 mm o Bending strength 1.5 2.0 1.5 2.0 1.5 2.0 1.5 2.0 1.5 2.0 Modulus of elasticity 150 200 150 200 200 300 200 300 200 300 y t i s r 19 mm to 25 mm 1.5 2.0 1.5 2.0 1.5 2.0 1.5 2.0 1.5 2.0 e Bending strength v 150 200 150 200 200 300 190 290 200 300 i Modulus of elasticity n U 25 mm to 32 mm 1.2 1.6 1.5 2.0 1.5 2.0 1.5 2.0 1.5 2.0 , Bending strength Modulus of elasticity 120 150 150 200 180 270 150 230 180 270 a r a 32 mm to 50 mm M Bending strength 1.2 1.6 1.5 2.0 1.5 2.0 1.5 2.0 1.5 2.0 i Modulus of elasticity 90 120 150 200 180 270 150 230 180 270 g o l o n k e T f o y t i s r e v i n U : y p o c d e s n 16 © BSI 10-1998 e c i L s s

s

s

s

s

s

s

s

s

s

s


BS 5669-2:1989

Publications referred to BS 476, Fire tests for building materials and structures. BS 476-7, Method for classification of the surface spread of flame products. BS 874, Methods for determining thermal insulating properties. BS 874-2, Tests for thermal conductivity and related properties. BS 874-2.1, Guarded hot-plate method. BS 2564, Control chart techniques when manufacturing to a specification with special reference to articles machined to dimensional tolerances. BS 5268, Structural use of timber. BS 5268-2, Code of practice for permissible stress design, materials and workmanship. BS 5701, Guide to number-defective charts for quality control. BS 5669, Particleboard. BS 5669-1, Methods of sampling, conditioning and test. BS 5669-3, Specification for oriented strand board (OSB) 4). BS 5669-4, Specification for cement bonded particleboard 4). BS 5669-5, Code of practice for the selection and application of particleboards for specific purposes. BS 6100, Glossary of building and civil engineering terms. BS 6100-4, Forest products. BS 6100-4.3, Wood based panel products. BS 6750, Specification for modular co-ordination in building 4). BS EN 309, Wood particleboards — Definition and classification.

4)

Referred to in the foreword only.

© BSI 10-1998

) c ( , 7 0 : 8 0 0 1 0 2 / 3 0 / 3 2 f o s a t c e r r o c n o i s r e V , a r a M i g o l o n k e I T S f B o y t i s r e v i n U , a r a M i g o l o n k e T f o y t i s r e v i n BSI U 389 Chiswick High Road : y London p W4 4AL o c d e s n e c i L

| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |

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BS 6399

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