Trees grow upward towards light. If a tree is subjected to natural forces, such as prevailing winds, loading from snow, ice, rocks or soil, or if it grows on a slope, it will still grow in such as a way as to bring its stem back to a vertical position. Reaction wood is the term used to describe the abnormal woody tissue which can develop in response.
Reaction wood develops in different parts of the tree in softwoods and hardwoods. It differs physically, microscopically and chemically, but also exhibits similar properties which affect the processing of wood and products in service.
In softwoods, reaction wood is called compression wood (CW) and is laid down on the underside (compression side) of the bend. In hardwoods, reaction wood is formed on the…
