wood
soft wood examples pine, sproose, douglas fur,
hardwood examples oak, mahogank, teak,
wood is fiberous with fibers running along the length of the trunk. 55% of the tree is cellulose 28% lignin resin timber is a natural fibre reinforced polymer
quater sawn timber
used for hardwoods more waste more stable, less liable to warp and twist
slab sawn board :
timber shrinks most along the annual ring. long annual ring