Which of the following best explains why timber with straight grains is often preferred for structural use?
Straight grains provide uniform strength.
Grain direction in timber significantly affects its mechanical properties:
- Straight grain: Wood fibres run parallel to the longitudinal axis → uniform tensile and compressive strength along the grain → predictable structural performance
- Cross grain / diagonal grain: Fibres at an angle → significantly reduced strength, especially in tension
- Interlocked/wavy grain: Difficult to work and unpredictable strength
Straight grain does not increase hardness or make timber lighter, but it ensures uniform, predictable strength — critical for structural applications.
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Important Questions from Timber
For which of the following process Boucherie process is used?
The defect in timber that causes longitudinal separation of woods between the annular rings is known as ________.
Which of the following is the main advantage of the plywood?
The hardwood is produced by which of the following trees?
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