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Stress Grades.
F11, F14, F17, F22, (unseasoned), F14, F17, F22, F27, (seasoned),
when visually stress graded in accordance with AS 2082:2000,
‘Visually stress-graded hardwood for structural purposes.’
Shrinkage to 12% MC.
2.6% (tangential); 1.2% (radial).
Unit Shrinkage.
0.30% (tangential); 0.19% (radial). These figures apply to timber
reconditioned after seasoning.
Durability.
Class 2 - Highly resistant to decay when fully exposed to the
weather, clear of the ground and well drained with free air
circulation. Only moderately decay resistant in the ground.
Lyctid Susceptibility.
Untreated sapwood susceptible to lyctid borer attack.
Preservation.
Sapwood accepts preservative impregnation.
Seasoning.
Kwila seasons well with kiln or air-drying, with little degrade and
very little shrinkage or movement.
Hardness.
Hard (rated 2 on a 6 class scale) in relation to indentation and
ease of working with hand tools.
Machining.
Working properties variable. Cuts cleanly but may have a blunting or
gumming effect on cutting edges. Cutting angle should be reduced to
20 degrees when planing quarter-sawn stock. Turns well.
Engineering.
Cross arms, bridge building, piles, sleepers, posts, wharfing,
mining timbers.
Construction.
Framing, decking, treads, general construction.
Decorative.
Furniture, especially outdoor settings and barbeque trolleys,
turnery, panelling, joinery, shop fitting, cabinet making, parquet
flooring, carving, veneer, counter and bench tops.
Others.
Boat building especially for decking, vats, musical instruments, and
tool handles.
Identification features
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