Tension Wood In Hardwoods

Longitudinal shrinkage results when reaction wood tension wood in hardwoods or compression wood in softwoods or juvenile wood is present in the lumber.

Tension wood in hardwoods.

Wood with a high cellulose content is especially strong in tension and can resist bending downward. Compression wood is rich in lignin while tension wood is rich in. Reaction wood in hardwoods is termed tension wood. Both strategies appear to work most of the time.

General machinability is fair although tension wood is frequently present and can cause a fuzzy surface when cut which in turn will require additional care when finishing. Singh in secondary xylem biology 2016 tension wood has high longitudinal. It dries easily but may still have a tendency to warp with slight movement in performance. Tension wood forms on the upper sides of hardwoods and contains more cellulose than normal wood.

Conners in encyclopedia of materials. Tension wood is 102. Tension wood reaction wood. Adaptations the reaction wood is called tension wood and forms on the upper side of the lower trunk and exerts a contractive force that tends to pull the tree toward the upright position.

Tension wood also known as reaction wood is a response of the tree to external stimuli the most common cause of tension wood formation is leaning of a tree. In hardwoods there is generally less eccentricity associated with tension wood but the annual rings may be wider. Trees that lean are uprooted bent from ice snow or trees growing on steep slopes may often have this eccentric reaction wood trait. The wood glues well and has good resistance to splitting when nailing and screwing.

In most angiosperms reaction wood is called tension wood. There are two different types of reaction wood which represent two different approaches to the same problem by woody plants. Tension wood forms on the side of the part of the plant that. Compression wood is formed on the lower side of trunk while tension wood is formed on the upper side of trunk.

Longitudinal stress results because the wood is shrinking longitudinally. Science and technology 2001 tension wood is found on. Key differences reaction wood in angiosperms is tension wood and reaction wood in gymnosperms is compression wood. Bruce hoadley s understanding wood reaction wood forms predominantly toward the upper side of the leaning stem.