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AS/NZS 1080.2.4:1998

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Timber - Methods of test Compound slope of grain
Available format(s)

Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users

Superseded date

06-30-2017

Language(s)

English

Published date

01-01-1998

Preview

1 - AS/NZS 1080. 2.4: 1998 TIMBER - METHODS OF TEST - COMPOUND SLOPE OF GRAIN
1 - 1 SCOPE
1 - 2 PRINCIPLE
1 - 3 REFERENCED DOCUMENTS
1 - 4 DEFINITIONS
1 - Compound slope of grain
1 - 5 TEST PIECE
2 - 6 PROCEDURE
2 - 7 EXAMPLE OF CALCULATION
2 - 8 REPORT

Describes a method for calculating the compound slope of grain from slopes determined for two surfaces at 90 degrees to each other.

This Standard sets out the method for determining compound slope of grain in timber articles of which the backsawn (flat sawn) and quartersawn surfaces exhibit grain deviation from the axis of symmetry. This Standard is one of a number dealing with determination of slope of grain.Where the radial and tangential surfaces both show evidence of sloping grain, the true slope may be found to be greater than that on either surface. This compound slope of grain may become critical in pieces of small cross-section that are highly stressed, such as ladder stiles.NOTE: Where predictable strength of timber is the primary consideration, sloping grain can be an important characteristic. It is often difficult to detect by visual examination of the surface. The importance of the characteristic will be appreciated where it is realized that sloping grain means that a beam with sloping grain has a strength that may be significantly less than the strength of the wood fibre in the beam, e.g. there is a reduction in the strength of beams, from the fibre strength, of approximately 20 percent for a slope of 1 in 16, 30 percent for a slope of 1 in 12 and 50 percent for a slope of 1 in 8. Grading processes identify this reduction in performance.It is stressed that this test method determines only whether or not a piece of timber has slope of grain and its magnitude. It does not set down any criteria for grade specifications.

Committee
TM-003
DocumentType
Standard
ISBN
0 7337 1639 3
Pages
2
PublisherName
Standards Australia
Status
Superseded
SupersededBy
Supersedes
UnderRevision

First published in Australia as AS 1080.2.4-1981.Jointly revised and designated AS/NZS 1080.2.4:1998. First published in Australia as AS 1080.2.4-1981. Jointly revised and designated AS/NZS 1080.2.4:1998.

AS/NZS 1080.2.1:1998 Timber - Methods of test Slope of grain by scribe
AS/NZS 1080.2.2:1998 Timber - Methods of test Slope of grain by reference to surface checks
AS/NZS 4491:1997 Timber - Glossary of terms in timber-related Standards (Reconfirmed 2016)
AS/NZS 1080.2.3:1998 Timber - Methods of test Slope of grain by splintering

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