Through and Through Sawing (Junior Cert Wood Technology): Revision Notes
📚 Revision Notes
Timber Conversion: Through and Through Sawing
Through and Through Sawing, also known as slab sawing, is a widely used technique in timber conversion. It involves cutting a log along its entire length in one consistent direction to produce planks. This method is valued for its simplicity and efficiency, ensuring rapid processing from logs to boards.
Process of Through and Through Sawing
- Logs are fed into the sawmill without the necessity for rotation or repositioning.
- The saw cuts directly through the log along its length to turn it into boards.
- Produces boards of uniform width efficiently.
Advantages of Through and Through Sawing
- Cost-Effective: Minimal labour and equipment costs due to the straightforward cutting approach.
- Speed: Faster than alternative methods, as the log remains stationary.
- Minimal Waste: Effective use of material, with most of the log being converted into usable lumber.
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Studies show that this technique maximises material usage and efficiency in timber conversion.
Disadvantages of Through and Through Sawing
chatImportant
- Cupping and Warping:
- Cupping occurs when the edges of a board rise higher than the centre due to uneven drying.
- Warping is a distortion of the wood's shape, happening when sections dry at different rates.
Common Use in Ireland
- Ireland frequently employs through and through sawing due to:
- Efficient processing capabilities.
- Compatibility with local machinery.
Summary
infoNote
- Through and Through Sawing speeds up timber conversion, offering cost savings and reduced waste.
- However, it also presents risks of cupping and warping.