The process of sawing logs into boards is called 'milling'. The factory that does this process is called a 'sawmill' or a 'lumber mill' on the west coast of the USA.
You must use your Axe to chop sticks and stumps.
Forestry is the study of anything tree and lumber related.
Lumber
Lumber
lumber
bracing in
Lumber firms are to do with sawmilling timber: tree-felling is part of that. After the tree is cut down, the lumber firm can make with saws, planks of wood for building. The planks of wood are called lumber.
lumberjack: one who works with lumber, similar to jack of all trades, lumberjack is a jack of lumber
I have found articles indicating that "heading" has something to do with kiln-dried lumber but other articles indicate that a "heading factory" has something to do with production of nuts, nails and similar fasteners. I have an uncle circa 1912 who was a foreman in a "heading factory."
Lumber must be seasoned to prevent it from cracking and warping. After being cut into boards, the lumber is dried (seasoned) in a heated drying shed called a kiln or in the open air.
Something is to be manufactured is factory(in factory worker called as Labour), a group of factory is called as industry( in industry workers called as employee).