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a) State two timber conversion methods.
b) Sketch the method which would be most suitable for joinery purposes.
a) State two timber conversion methods.
(1) Through & Through
Through & Through Little thought is given to the use of the timber (Plain, Flat or Slab sawn) and consequently it is used mainly for softwoods. The method is cheap and some boards are wide, but outer boards tend to warp (or cup).
(2) Quarter Sawn
Quarter Sawn used predominantly for hardwoods where stability (and in some cases madullary figure is required. Quarter sawing is expensive in production time and also in the waste the produced but boards are more stable, shrink evenly and generally stay flat.
b) Sketch the method which would be most suitable for joinery purposes.
Tangential Sawn
Tangential sawn or round the log is a suitable method of converting timber for both carpentry and joinery purposes.
For Carpentry it is relatively strong because of the long cross grain.
When correctly seasoned for Joinery it is reasonably stable (which means it twist warps and shrinks little and predictably). Also the boards cut from the centre of the log are predominately heartwood which is more durable and there are less knots.
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