Seasoning Flashcards

0
Q

Green timber is

A

Timber that is first felled

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1
Q

Moisture content in a newly felled tree

A

50%

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2
Q

Suitable moisture content

A

20% or less

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3
Q

Reasons for seasoning

A
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4
Q

Hygroscopic ?

A

A substance affected by moisture changes

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5
Q

Equilibrium?

A

Wood will absorb and release moisture to reach a Balance with the surrounding air

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6
Q

EMC ( equilibrium moisture content )

A

Balance with the surrounding moistire content by absorbing or releasing moisture

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7
Q

Two types lf seasoning ?

A

Natural/ air seasoning

Kiln seasoning

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8
Q

Seasoning

A

The drying of timber

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9
Q

Air seasoning advantage

A

❗️no expensive equipment needed
❗️little labour cost
❗️not energy dependant

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10
Q

Air seasoning diasadvantage

A
✖️slow drying process
✖️ large area required
✖️depends on the weather
✖️cannot be controlled
✖️dries to 20-22%
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11
Q

Air seasoning?

A

Planks or boards of wood stacked on top of eachother.
Stickers divide each plank to allow even air flow
Block piers lift the timber off the ground
It has a shelter with a slopped roof to allow the rain to run off it and keep the wood dry.

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12
Q

Kiln seasoning advantage

A
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13
Q

Kiln seasoning disadvantage

A

❗️ its expensive
❗️ requires a skilled operator
❗️ heating the kiln needs a lot of energy

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14
Q

Kiln seasoning

A

Kiln is a large oven
Timber is stacked on trolleys and wheeled in
Steam is pumped in to heat the wood and maintain moisture levels
Fans keep the air circulating
Hot air id allowed to escape through vents

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15
Q

How to prevent the nends splitting

A

✖️ Cover the ends with a sack cloth

✖️paint the endspf the boards