Woods

Question 1

What is air seasoning?

Answer 1

This is a more traditional method of seasoning, more inexpensive than kiln.

Involves stacking wood under a shelter, protected from rain, air circulates to remove moisture.

More common in outdoor wooden products, due to it being seasoned to the same moisture as surroundings, leaving it less prone to defects.

Question 2

What is kiln seasoning?

Answer 2

A more expensive method than air seasoning, although more controlled method which is a lot faster as just takes a few weeks.

Planks are stacked onto trollys where they are then moved into a kiln in which both humidity and tempurature are controlled. Initially, the kiln will be steamy, although atmosphere changes to be hotter and drier.

Indoor products such as furnature will use kiln - seasoned wood due to it matching the indoor moisture of its surroundings which will have a lower moisure content in comparison to air - dried wood.

Question 3

What are the advantages of seasoning wood?

Answer 3

• Greater immunity to decay, and increased resistance to rot
• Increased strength and stability
• Helps preservatives to penetrate
• Makes wood less corrosive to metals

Question 4

Name some Stock Forms of wood

Answer 4

Rough Sawn - Wood that comes directly from seasoning and keeps rough surfaces without enhancement.
PSE (Plained Square Edge) - One edge is planed accurately, the rest are all rough sawn. Removes 3mm from one edge.
PAR (Plained All Round) - All sides and edges of the wood are plained square, straight and level leaving a smooth finish. All sides are about 3mm smaller.

Question 5

Name 3 softwoods

Answer 5

Pine
Spruce
Cedar

Only available for sizes that fit the width of the tree, meaning sheets must be joined together to fit the width of a table top.

Question 6

Name 3 hardwoods

Answer 6

Oak
Birch
Maple

Only available for sizes that fit the width of the tree, meaning sheets must be joined together to fit the width of a table top.

Question 7

Name 3 manufactured boards

Answer 7

MDF
Chip Board
Plywood

Can be produced in a variety of different sizes, meaning the joining process is not needed for the final product.

Question 8

What are the 3 different types of woods?

Answer 8

Softwood
Hardwood
Manufactured Board

Question 9

What safety issues are there with using wood for manufacture?

Answer 9

The dust from the woods, as well as the sap can be a hazard to health. Different species can pose different risks, meaning the manufacturers will need to be aware of the different toxicities from different species.

Under the control of substances hazardous to health act (2002), all wood particles must be limited to 5mg per cubic metre. Otherwise, respitory issues may occur,

Question 10

What are some characteristics of wood?

Answer 10

• Elasticity
• Tensile Strength
• Compressive Strength

Question 11

Name some uses of hardwoods

Answer 11

Construction of sturdy buildings
Fences
Decking
Cladding
Luxury Furnature

Question 12

Name some uses of softwoods

Answer 12

Furnature and cabinets
Pine is a good absorber of pains + oils
Children Toys

Question 13

Name some uses of manufactured boards

Answer 13

Shelving

Doors

Question 14

Name some uses of PAR wood

Answer 14

Tables
Furnature
Cabnets

Question 15

Name some uses of PSE wood

Answer 15

Cladding
Decking

Other floor surfaces where only one side can be seen