Posts Tagged ‘beam’

Timber Specification for Garden Design

Timber Specification: Understanding  Quality and Strength  The proper timber specification is very important as it's a natural material and therefore its quality varies considerably.  Defects can include knots and shakes (splits down the grain), twist, etc.  Softwood joinery is classified into 3 qualities in British Standard EN 942.  Class 1 is the best quality down to Class 3, the poorest. The highest class will have no splits or shakes, etc., and any knots will be small. This classification is for its visual quality only and not its strength. For garden designers, some timber specification [...]

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