![]() ![]() This is essentially a process for quality control. ![]() Step 11 – Grading the Lumber – The actual milling process is now complete. The length will vary based on the order or lumber size. Step 10 – Trimming – The trimmer is used to cut the lumber to length. This squares up the log so that it fits a specific grade or width. Step 9 – Edging the Log – The lumber gets its sides cut. The resaw uses multiple bandsaw or gang saw blades to cut the log into the boards that were merchandised. Step 8 – Resawing – Cants that enter the resawing stage are usually being milled into rough cut lumber. Waste sections, or slabs, from cants are recycled into chips, pellets, or mulch. This sets a flat surface to square the work for secondary cants that turn into rough sizes for finished lumber products. The first or primary breakdown is called the best opening face (BOF). Step 7 – Canting – The head rig cuts the log into sections called cants. Step 6 – Head Rig Sawing – “The heart of the sawmill” - Logs enter the head rig saw by getting clamped on a conveyor belt where the head rig blades move through the log. It assesses each log for market conditions and standing orders. Merchandising takes in more than just the log’s length and girth. This information determines what sizes of timber, dimensional lumber, and boards can come from a particular log. Lasers scanning or camera viewing estimates the raw log for its maximum cut value. Step 5 – Merchandising the Log – Makes sawmills much more efficient. For the logs to have metal in them, the metal will either be removed, or the log will be cut into smaller sections so as much as possible can be salvaged. Often you will find nails, wire fencing, or other metals in the logs which can ruin your sawmill blades if they’re not caught beforehand. Since trees can live for hundreds of years, there’s no saying what could be found in them. Step 4 – Metal Detection – Each log will go through a large metal detector before being cut. The bark is then saved as it can be sold as mulch or used to fuel certain kilns at a sawmill. Logs are also bucked or crosscut with a circular saw into specific lengths at this stage. Most sawmills use debarking machines like mechanical ring cutters, cambio drums, or water-jet blasters. A debarking machine is used to strip the log of its bark. Step 3 – Debarking the Log – Once the log gets to the front of the conveyor belt, it will enter the mill to be debarked. Step 2 – The Log Enters the Sawmill – The log is moved using a piece of heavy machinery and put on a belt where it awaits to be cut. Once at the mill, the logs are unloaded and stacked into piles where they wait to be cut. Then, the log is delimbed and loaded on a truck for transportation to the mill. Felling is essentially cutting down the tree and cutting it to length. Trees are cut down using chainsaws during the logging process. Step 1 - Logging & Transportation – Timber harvesting, or logging, is the first step to getting a log to the sawmill. ![]()
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