Karri tree appearance wood uses and lumber
Karri trees are native to Western Australia and both loved for their lumber and shade. These trees are one of the tallest eucalyptus tree species from Australia. The scientific name of karri is eucalyptus diversicolor and is part of the mytaceae family. This tree is just like the jarrah tree harvested for its hardwood properties. The tree trunk is long and straight. This makes karri lumber available in very long pieces and ideal for building and construction!
Karri tree, leaf and flower description
The karri tree can grow to heights up to 260 feet or 80 meters. The tree is classed evergreen and has leaves all year.
Karri leaves are arranged opposite and lanceolate shaped. New leaves are grass green colored and darken when aging. Mature leaves reach lengths up to 10 inches or 25 cm.
Karri trees have nice looking creamy white red flowers hanging in clusters. The flowers are not big and hard to see from the ground. They play just like the jarrah tree a big role in the production of honey and are a real heaven for bees.
Karri tree bark and trunk
Young karri trees have smooth bark with various colors ranging from white to dark brown. Old bark will form long peeling ribbons that hang from the trunk and branches. The trunk of the karri tree is very long and straight. Lower branches loose their leaves and break off, resulting in a straight trunk. The diameter of the trunk depends on the age of the tree. Older trees can have trunks with a diameter up to 11 feet or 3.3 meters.
Karri wood properties and durability
Fresh karri heartwood has a rich reddish brown color. The sapwood is lighter reddish brown but exposure to sunlight gives it a darker color, more in line with the heartwood. Karri wood has nice colorations, medium to coarse texture, heavy hardwood, high in strength, high stiffness and good shock resistance properties. The average dried weight of the wood at a moisture content of 12% is 890 kg per cubic meter. The durability of karri wood is classed as II moderate high durability.
Karri wood working tips and uses
Karri wood is hard and heavy hardwood. It is difficult to work with hand tools. The wood can even have blunting effect on cutting edges of machines.
Pre drilling is advised when screws or nails are used. Karri wood glues and finishes well both by hand or machine. It is recommended to let the lumber acclimatize to the environment. Fresh wood can shrink when drying and case internal bending stresses. This can result in wrapping and bending or visible cracks.
Karri wood is used in a wide range of products like
- heavy constuction
- high quality veneer
- telephone poles
- and more!