Timber Conversion

Question 1

What is conversion

Answer 1

Conversion is when logs are cut into usable boards in a saw mill

Question 2

Why are logs converted into boards

Answer 2

It allows wood to dry faster

It produces wood of even size and shape

Question 3

What are the 3 main methods of converting logs ?

Answer 3

1. Tangential sawing
2. Through and Through sawing
3. Quarter sawing

Question 4

What are 2 advantages and disadvantages of tangential sawing

Answer 4

ADV
1. Reveals the attractive grain
2. Resists splitting
DISADV
1. Prone to cupping
2. More waste produced

Question 5

What are 2 advantages and disadvantages of quarter sawing

Answer 5

ADV
1. There stable and shrink less
2. Length of rings are even
DISADV
1. More waste produced
2. More expensive

Question 6

What is cupping

Answer 6

Cupping occurs naturally as wood dries on the outside of the board. This causes it to shrink away from the heart of the wood.

Question 7

Give 2 advantages to Through and Trough sawing

Answer 7

ADV
1. Low cost method
2. Little waste
DISADV
1. Prone to cupping
2. Prone to fungal and insect attack