3.1.2 - Performance characteristics of woods

Question 1

Stock forms - What is rough sawn?

Answer 1

The wood comes directly from seasoning and has rough surfaces, it has normal sizes rather than accurate finished sizes.

Question 2

Stock forms - What is planed square edge (PSE)?

Answer 2

The wood only has one edge that is planed accurately, the rest are rough sawn. Planing removes about 3mm from the original size.

Question 3

Stock forms - What is planed all round (PAR)?

Answer 3

The wood has sides and edges that are all planed square meaning it is straight and level, leaving a smooth finish. The PAR board is 3mm smaller all round than the original wood.

Question 4

When joining two planks of wood together what direction must the two grains go in?

Answer 4

Opposite directions.

Question 5

Natural wood is only available at the maximum width of ___ ____.

Answer 5

The tree.

Question 6

What are 6 advantages of manufactured boards?

Clues:

• Size
• Temperature
• Strength
• Difficult to…
• Price
• Veneers

Answer 6

• Available in long, wide boards of same thickness and quality.
• Not affected by temperature and humidity as much as solid wood.
• Stable strength across the board, no grain issues.
• Difficult to split
• Generally less expensive.
• Veneers can be applied to the surface for enhanced aesthetics.

Question 7

What are wood mouldings examples?

Answer 7

Skirting boards and wood trimmings.