A greenchain is a lumber sorting process used in sawmills and logging plants to sort and stack freshly cut lumber by size and quality. It has evolved from manual labor to automated or combined human and mechanical labor. The process is used to select green lumber for further processing or sale and helps control and organize lumber stacks.
A greenchain is a type of lumber sorting process used in sawmills and logging plants. This process is used to sort and stack freshly cut lumber according to its size and quality. Generally, a greenchain is incorporated into the lumber manufacturing process soon after the logs have been cut to size, but before the wood undergoes any treatment or processing. The term green chain has had different meanings throughout history and today can be used in different ways depending on the region or country.
The green chain process gets its name from green lumber, which is a term used to describe all untreated lumber products. Greenwood generally includes logs that are freshly cut and can be stripped of their bark. They are considered green at all stages of the sawmill manufacturing process, including cutting and debarking. Much of this lumber eventually goes through some form of treatment, including pressure treatment, spraying, or coating. Green lumber can still be used by some wood craftsmen and builders who rely on more traditional materials and techniques.
Throughout history, most green chain lumbering processes have relied on manual labor. Freshly cut wood was pulled from a pile by human workers and dropped into piles or stacks. Workers can sort the wood in a number of ways based on the needs of the project. For example, they may process timber by length, diameter, species or grade. This type of green chain was very labor intensive and also exposed the workers to a great risk of injury.
Modern green chain manufacturing is typically automated or relies on a combination of human and mechanical labor. This type of operation involves some form of lumber sorting machine, usually a belt or set of rollers. The straps are often lined with steel chains, which help hold the lumber in place and control its movement. Workers can pull several pieces of lumber out of a pile and drop them onto these belts for sorting. Other sawmills may use multiple green chain belts to direct different types of lumber to different areas of the plant.
This process serves as a simple and effective method of selecting green lumber for further processing or sale. It allows workers to sort materials based on a variety of different factors, including size, species, or wood quality. A green chain also helps control and organize the lumber stacks found in most sawmills. Modern plants can even incorporate portable tracking systems or special software into the green chain process to allow workers to keep track of each unit of wood as it is sorted.
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