Stock forms - wood Flashcards

1
Q

what is Rough sawn wood?

A

wood that hasnt been sanded

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2
Q

what is PSE wood?

A

Planed square edge is when the top and bottom are rough but the sides are sanded

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3
Q

what is PAR wood?

A

planed all around is when all sides are fully sanded

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4
Q

Rough sawn wood properties

A
  • cheap
  • good for house structures
  • rough
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5
Q

planed wood properties

A
  • more expensive
  • better quality
  • sanded/finished all round
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6
Q

what is a planer and what does it do?

A
  • It reduces the thickness of the wood

- Cuts wood for a 90 degree angle

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7
Q

what are moldings? with an example

A

Wood that has been cut with designs or ridges for skirting boards

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8
Q

how big is a full manufactured board?

A

1220x2440mm

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9
Q

Soft wood properties and examples

A

-Fast growing
- low cost
-long and straight
[pine, Douglas fir, cedar, spruce, redwood and larch]

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10
Q

Characteristics of Pine [+a use]

A
  • lightweight
  • strong
  • easy to machine
  • cheap
  • needs treating
  • furniture
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11
Q

Characteristics of Spruce [+a use]

A
  • easy to work with
  • uniform texture
  • flexible
  • strong
  • lightweight
  • open cell structure
  • old planes
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12
Q

Characteristics of Redwood [+a use]

A
  • grow 3m a year
  • lightweight
  • soft
  • good strength to weight ratio
  • good for decking and musical instruments
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13
Q

Characteristics of Cedar [+a use]

A
  • high oil content
  • resistant to decay
  • toxic
  • used for boats
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14
Q

Characteristics of Larch [+a use]

A
  • hard timber
  • high resin content
  • used for veneer
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15
Q

Characteristics of Douglas Fir

A
  • tough wood
  • cheap
  • strong
  • high density
  • high resin content
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16
Q

Characteristics of Oak + one use

A
  • tough
  • durable
  • rot resistant when exposed to moisture
  • contains tannic acid which corrodes steel
  • good for engineering [ship building and architechture
17
Q

Characteristics of Ash [+ 1 use]

A
  • springy
  • large open pores [elastic properties]
  • shock resistant
  • bendy wood
  • used for sports equipment
18
Q

Characteristics of Mahogany + what its used for?

A
  • stable
  • good workability
  • nice grain
  • long and wide
  • defect free
  • good for veneers
19
Q

Characteristics of Teak + one use

A
  • high oil content
  • good for outdoors
  • durable
  • toxic
  • high resistance to acids and alkalis
  • outdoor furniture
20
Q

Characteristics of Birch

A
  • fine grain
  • least insect and rot resistant
  • even structure
  • low cost
  • easy to work with
  • noticeable defects
21
Q

what wood is illegally logged in Brazil?

A

Mahogany

22
Q

what woods are hard woods?

A

oak, ash, mahogany, teak , birch , beech

23
Q

Characteristics of beech + one use

A
  • hard
  • tough
  • odorless
  • close and straight grain
  • easy to work with
  • flexible
  • good for steam bending
  • used for food bowls
24
Q

Characteristics of Plywood

A
  • made from low grade hard and soft wood
  • strong in every direction
  • cant split along the grain
  • uniform
  • can contain knots
25
Q

Characteristics of Marine plywood

A
  • made from thin water resistant layers
  • phenolic resin bonds layers together
  • defect free layers
26
Q

what is Aeroply used for?

A
  • used to make airplane wings
  • used for curved shapes
  • made from several birch layers
  • used for laminating
27
Q

What is flexiply?

A
  • thin central veneer with 2 soft outers
  • used for curved forms
  • used for laminating
28
Q

what is MDF?

A
  • made from fine dust particles bonded with resin and pressure
  • has a smooth finish and uniform density [CNC milling]
  • need surface treatment
  • more durable with veneer or hard-wearing paint
  • not moisture resistant as hygroscopic
29
Q

what is plywood?

A

-made from large wood chips bonded with resin and pressure
-less predictable density
-need surface treatment
more durable with hard- wearing paint or veneers
-not moisture resistant

30
Q

what are MDF and Plywood used for?

A

flatpack furniture

31
Q

Properties of Melamine Formaldehydes Laminates

A
  • makes soft woods hard and durable
  • heat, chemical and moisture resistant
  • hygienic as wipe-clean
32
Q

What are wood veneers?

A
  • highly prized hardwoods are used
  • harness aesthetic qualities without the cost
  • add value to low-medium cost materials