Timbers Flashcards
Timbers
Planks of wood squared for use in building or carpentry
Hardwood Qualities
Sustainable
Tight grain
Loose leaves
Expensive
Hard
Have fruit
Slow
Hardwood examples
Oak, mahogany, ash, beech, teek
Softwood Qualities
Looser grain
Cheaper
Evergreen
Have needles
Tall
Quicker growing
Softwood examples
Larch spruce pine fir cedar
Manufactured board qualities
Cheaper
Any size
Any thickness
Produced by gluing
Veneer laminates
What is seasoning?
Storing wood to keep it in good condition
Gets rid of moisture
Kiln seasoning
Seasoning in an oven
Advantages of kiln seasoning
Much quicker
Could split
No bugs and fungus
Kiln seasoning disadvantages
Could split more expensive
Timber Defects
Splitting,
Knots,
Decay,
Woodworm
Splitting
Unavoidable issue where ends split,
Preventable by painting ends of planks. Or cutting off ends to remove splits
Knots
Where a branch was attached to a tree
Live knots are ok, dead knots can fall out, must be avoided
Decay (dry rot)
Serious problem caused by incorrect seasoning or poor building maintenance
Happens when moisture is over 20%
Woodworm
Common furniture Beetle lays eggs on timber, larvae eat wood for 1 year the emerge as adult beetles
Stock forms of wood
Rough Sawn
Natural Timber
Manufactured boards
Veneers
Planed square edge
Smooth all round
Mouldings
Performance characteristics
Warpage
Steam bending
Shrinkage
Grain pattern and direction
Resistance to decay
Toughness
