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Dt > Timbers > Flashcards

Timbers Flashcards

1
Q

What are the main characteristics of hardwoods

A

Decidous
Grow in temperate climate
Can be very expensive
Usually hard
Seeds are in the fruit
Broad leaves and branches at the top of the tree
Long time to mature (100 yrs to maturity)
Some are evergreen but mainly in tropical or subtropical countries

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2
Q

What are the main characteristics of softwoods

A 
Coniferous - bear cones
Grow in cooler climate
Softer and easy to work
Often used as building materials
Needle like leaves
Triangular shape
Branches all along the trunk
Quick growing so cheaper than hardwood
Grow tall and straight which make it easier to have long planks
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3
Q

Examples of softwood

A

Larch
Pine
Spruce
Redwood

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4
Q

Examples of hardwoods

A 
Ash
Beech
Mahogany
Oak
Balsa
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5
Q

Properties and uses of ash

A

Tough and flexible

Sport equipment, ladders

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6
Q

Properties and uses of beech

A 
Strong
Prone to splitting
Furniture
Toys
Bench tops
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7
Q

Properties and uses of mahogany

A 
Strong and durable
Wide planks
Good quality furniture
Panelling
Veneers
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8
Q

Properties and uses of oak

A 
Hard
Tough
Finish to high standard
Floors
Quality furniture
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9
Q

Properties and uses of balsa

A 
Strong and durable
Lightweight
Easy to work
Model making
Floats
Rafts
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10
Q

Properties and uses of larch

A 
Reddish
Resistant to rot
Tough but easy to work
Fencing
Decking
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11
Q

Properties and uses of pine

A

Soft and easy to work
Quite knotty
Furniture
Window frames

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12
Q

Properties and uses of spruce

A 
Easy to work
Small knots
Lightweight with good resonant properties
Furniture
Stringed musical instruments
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13
Q

What are the advantages of manifactured boards over wood?

A

Available in larger sheets
Consistent properties throughout the sheet
More staible (eg less prone to shrink or twist)
Environmental benefits

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14
Q

What is the difference between laminated boards and compressed boards

A

Laminated: produced by gluing large sheets or veneers together
Compressed: manufactured by gluing chips or particles together

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15
Q

What are the two main categories od manufactured boards

A

Laminated and compressed

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16
Q

MDF what is it

A

Manufactured from fine fibres of wood combined with synthetic adhesive

17
Q

MDF how is it produced

A

The MDF pulp is compressed between two heated plates where the adhesive bonds the fibres together

18
Q

What is used to make MDF

A

Low grade softwood
Hardwood
Waste from wood manufacturing process

19
Q

What is dangerous about working with MDF

A

its dust can cause respiratory issues

20
Q

How is the surface of MDF

A

Smooth and it is easy to apply a nice coat of paint

21
Q

What can be used to improve the appearance of MDF

A

Veneer

22
Q

What are the commn uses of MDF

A

Flat pack furniture

Shop interiors

23
Q

How is Plywood produced

A

It is made up of several veneers of wood glued on top of each other
Each layer laid at 90 degrees
Grains alternate directions
Odd number of veneers
Two outside surfaceshave grain in the same direction

24
Q

What are the outside venners of plywood made of

A

More expensive veneer such as oak

25
Q

What are the different grades of plywood

A

Grade A is the best and almost blamish free

Grade D is the worst and it will have knots visible and patches

26
Q

What is one of the main advantages of plywood over other boards

A

Stiffness

27
Q

Main uses of plywood

A

Laminated flooring
Furniture
Roofing

28
Q

What is chipboard made of

A

Large flakes of wood glued together

29
Q

Advantages and Disadvantages of chipboard

A

Inexpensive

Not as strong and durable

30
Q

When would chipboard be used instead of MDF or Plywood

A

When costs factors are more important than appearance

31
Q

Uses of chipboard

A

Kitchen worksurfaces
Kitchen cupboads
Flooring

32
Q

What is meant by conversion

A

When wood is felled and its bark removed, cut into planks and turns into timber

33
Q

What is seasoning

A

Newly cut wood (green) contains moisture which makesnit easy to rot, split and warp. Seasoning is the action of removing moisture

34
Q

What is the FSC logo

A

This logo stands for forest stewardship council and means that the wood used comes from forests managed in a sustainable way

35
Q

What is the FSC

A

A nin profit organisation created to protect sustainability of forests

36
Q

What does it mean to sustainably manage a forest

A

Companies before cutting trees need to consider the economic, social and environmental impact

Dt (3 decks)

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