Timber (Leaving Cert Construction Studies): Flashcards

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Timber
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Softwood source

Coniferous, cone-bearing trees

Hardwood source

Deciduous, fruit-bearing trees

What does hydroscopic mean?

Absorbs moisture from surroundings

Best quality timber part

Heartwood

Max moisture content for structural timber at construction

24%24\%

Moisture content needed for wet rot

30%30\% or higher

Moisture content needed for dry rot

Above 20%20\%

Plywood construction feature

Layers at 90° angles (cross-grain)

EU standard for Irish structural timber

IS EN 1995

NSAI stands for

National Standards Authority of Ireland

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