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Technology > Woods > Flashcards

Woods Flashcards

1
Q

Name hardwood properties

A

Deciduous
Broad leafed trees
Slow growing - up to 100 hrs to reach maturity
Tend to be more harder and more expensive

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2
Q

Name softwood properties

A

Evergreen
Needle like leaves
Take up to 30 hrs to reach maturity -fast growing

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3
Q

Name different hardwoods

A 
Oak
Mahogany 
Beech 
Jelutong
Balsa
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4
Q

Name different softwoods

A 
Scots pine
Parana pine 
Cedar 
Larch 
Redwood
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5
Q

Oak properties and uses

A

Strong
Durable
Aesthetically pleasing
Works well

expensive
Heavy
Prone to splitting

Furniture 
Flooring 
Staircases
Outdoor furniture 
Skirting boards 
Construction
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6
Q

Mahogany properties and uses

A

Strong
Aesthetically pleasing- reddish brown
Durable
Works well

  • Expensive
  • Secured from rainforests - bad carbon trial, harmful to environment
  • Becoming harder to source
  • Prone to warping - used to warm climate

Flooring
Furniture
Staircases
Skirting boards etc

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7
Q

Beech properties and uses

A 
STRONG 
HARD 
DURABLE          
TOUGH 
Therefore difficult to work with
——————————————————-
Prone to warping , so not suitable for outside use
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8
Q

Jelutong properties and uses

A

Low density
Straight grain
Fine texture

Sculpting
Pattern making

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9
Q

Balsa properties and uses

A

Distinct velvety feel
Exceptional strength to weight ratio
Lighted and softest wood on the market

Light work such as
Model making
Model airplane construction

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10
Q

Pine properties and uses

A 
SCOTS PINE:
Straight grained but knotty 
Fairly strong
Easy to work with 
Cheap and readily available

Cheap quality furniture
Constructional work
Simple joinery
________________________________________

PARANA PINE: 
straight grained and almost knot free 
Fairly Strong 
Hard 
Durable 
Expensive

Good quality knot free pine red/brown furniture eg doors and staircases

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11
Q

Cedar properties and uses

A 
Pale yellow
Lightweight 
Strong 
Straight grain 
Fine and even texture 
Easy to work with

Prone to splitting
Expensive- shipped in

Furniture
Boat building
Veneers
Model making

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12
Q

Larch

A 
Tough 
Waterproof 
Resistant to rot when in contact with the ground 
Durable 
Bonds of sap highlight grain pattern 
Fairly easy to work with 
Prone to splitting 
Top quality knot free timber

Yachts and other small boats
Exterior cladding of buildings
Interior panelling

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13
Q

Redwood

A 
Quite strong
Lots of knots 
Durable when preserved 
Cheap 
Easy to work with

General woodwork
Cupboards
Shelves
Roofs

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14
Q

MDF

A

Primarily made from wood waste in the form of wood chips that are subjected to heat and pressure in order to soften the fibres and produce fine, fluffy and light weight pulp which is then mixed with a synthetic resin adhesive.

Easy to work with - no grain
Available in large sheets
Absorbs water
Used in school furniture etc

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15
Q

Plywood

A

Made by gluing thin sheets of wood together at 90 degree angles
This is so the grains are running in opposite directions, increasing overall strength of plywood
Always odd number of layers so top and bottom grain run in the same direction
Very stable - does not warp or distort
Durable

Not waterproof - can make layers come apart
Difficult to machine -many grains

Attic flooring
Stud wall
Constructional work

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16
Q

Block board

A

Consists of thin sheets of either mdf or veneer with planks of softwoods in the centre (softwood sandwich)

Strong over long distances
Inexpensive but looks well - veneer added
Difficult to work with/manufacture due to different grains in softwoods

17
Q

Hard board

A

Wood fibre is obtained from exploded wood fibres/ wood chips and pulp that have been highly compressed

Similar to mdf but much more denser, stronger and harder

Absorbs moisture easily - unsuitable for outside

Has been used in furniture and construction industry
Become less popular due to environmental standards

18
Q

Chipboard

A

Made from wood particles, chips, flakes and shavings.
Bonded together with synthetic resin adhesive

Often used in kitchen units, cupboards etc,
Can be Veneered to give it an attractive finish

If it gets wet it becomes waterlogged, swells and breaks down.

19
Q

Veneer

A

Process of applying a thin sheet of decorative wood to the surface of another material eg. Manufactured boards
This is done to improve the overall appearance of a relatively cheap wood

Can also get synthetic/polymer veneers

20
Q

Name different manufactured boards

A 
Mdf 
Plywood
Blackboard
Hardboard
Chipboard
Veneer

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