1.2 Woods Flashcards
What are hardwoods
Slow growing deciduous
What are softwoods
Fast growing evergreen
What should work be done along with woods
the grain
What biopol supports woods cell walls
lignin resin
Why are trees felled in the winter
As they have less growth, less sap therefore less water
What (explain) the 2 types of wood conversion
plain sawn - cut into boards, quarter sawn - the log is cut into quarters then cut into boards
What is wood seasoning
Removing excess water(80-90%) to match the environment
What are the 4 adv of seasoning timber
decay immunity, greater strength, helps preservatives penetrate, less corrosive to metals
What are the 2 types of wood seasoning
air and kiln seasoning
What are the adv of air seasoning
cheap
What are the disadv of air seasoning
slow only meets outdoor conditions
What are the adv of kiln seasoning
quick and good for outdoor products
What are the disadv of kiln seasoning
expensive
What are the 7 wood types
Oak, beech, ash, mahogany, pine, teak, cedar
What is the most prevalent wood shrinkage direction
tangentially
What is shrinkage of wood
The expanding and contracting of wood causes warping and cracking, mainly during seasoning
What is a use of oak
exterior posts
What is a use of ash
tool handles and chair legs
What is a use of beech
wooden mallets
What is a use of teak
outdoor furniture
What is a use of mahogany
indoor furniture
What are the properties of ash
flexible and tough
What is a use of pine
interior timber framing
What is a use of cedar
cladding
What are the properties of oak
hard, tough, durable but heavy and hard to work
What are the properties of teak
hard and tough
What are the 3 ways to prevent wood hazards
ppe, low exposure, extraction and ventilation
What are the properties of beech
hard
What are the properties of mahogany
hard to work
What are the properties of cedar
durable
What are the properties of pine
strong and cost effective
What are the 2 wood hazards
sap and dust
What are the hazards of dust and sap
dust - respiratory irritation, sap - toxic and irritant
What are the 3 wood stock forms
PAR, PSE, rough sawn
What is rough sawn wood
wood that is directly from seasoning
What is PAR wood
Wood that has all planned edges and sides
How are skirting boards made
With wooden profiles(Moulding)
What is PSE wood
Wood that only has 1 planned edge
How should you join wood planks
At opposing grains
What is the thickness of veneers
less than 3mm
What are the adv of veneers
cheap, efficient use of rare species
What are properties of plywood
strong, expensive, non attractive edges
What are the 6 manufactured boards
Plywood, marine ply, aero ply, flexi ply, MDF, chipboard
What is marine ply
regular ply with water-resistant glue
What is plywood generally faced with
birch
What is a use of marine ply
boats
What is aero ply
thin sheets of ply around 1.5mm
What is a use of aero ply
gliders
What are the 5 adv of manufactured boards
large sheets, uniform performance, stable, flexible or rigid, doesn’t split
What is flexiply
open grained on outer faces with minimal inner ply across grain
What are properties of chipboard
low density, cheap, easily damaged
What are properties of MDF
stable, uniform strength and appearance, needs sealing
