Lumber, also known as square timber, is sawn into square strips according to processing requirements. It is widely used in decoration, door & window materials, formwork support and roof frame for structural construction, as well as the production of all kinds of wooden furniture.

Generally speaking, lumber with moisture content between 8% and 12% after drying performs well without cracking or warping during application. The drying method can serve as a simple reference for judging moisture content. There are two main drying methods: machine kiln drying and natural air drying. Steam kiln drying delivers better results, enabling thorough drying for stable timber performance. By contrast, naturally air-dried timber tends to crack. Without professional measuring equipment, moisture content can also be tested via simple practical methods.