How does wood turn into lumber? Detailed answer

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How does wood turn into lumber? Detailed answer

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How does wood turn into lumber?

The lumber industry is one of the oldest industries in America. There is a legend that Leif Erickson, who is supposed to have visited North America around the year 1000, returned from the New World with a load of logs! It is known that one of the first goods brought to England from the colony of Jamestown was timber from the virgin forests.

Many tree species are used for construction and other purposes. The softest woods include pine, fir, hemlock, spruce, white fir, cypress and mahogany. Hardwoods are used to make furniture, floors, and include oak, gum, maple, poplar, and walnut.

After the tree is cut down, all branches are cut from it, and it turns into a log. After that, the logs are dragged by portage or floated on the water to the sawmill. Once at the sawmill, the log can be sawn to length into two or more pieces. Then the log gets on the cart and is transported to the conveyor. The log is firmly held, and the cart moves to the beginning of the conveyor. The log comes into contact with the saw, which cuts it lengthwise. This continues until the log is cut into several boards of the required thickness.

Then these boards are cut off the edges, they are stretched and sorted. Now they must be dried before they can go to work. This is done because the weight of freshly sawn boards is two-thirds water. If this wood is used immediately, then, after drying, it warps and cracks. Some lumber is air-dried in stacks, which can take anywhere from a month to over a year.

But with this method of drying, 15-20% of water still remains. Another way is that the boards are placed in a heated dryer. Here, the lumber dries from two days to two weeks, and the amount of water is reduced to a very small level. For floors and furniture, wood should be as dry as possible, although 15% moisture is considered normal for most products.

Author: Likum A.

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