What do you mean by logging as a beam? Interpreting logging as a beam

1. Interpretation of logging as a beam in Gregorian calendar: cutting trees _ making roof beams, etc.

2. Among all kinds of trees, Chinese fir is the best tree as the main beam. Because Chinese fir is generally medium in texture, it is resistant to bending and bending: Chinese fir is straight in texture and easy to process; Chinese fir is resistant to corrosion and is not easy to attract insects. In terms of use, Chinese fir is also widely used in various buildings, furniture, bridges and columns, especially the wooden poles in rural areas in the past. After Chinese fir, the second best is pine. As for why pine trees rank second. Compared with Chinese fir, pine is denser and harder in texture, but heavier in weight, and its compression and bending resistance is not as good as that of Chinese fir. Chinese fir is the most widely used. Although Chinese fir is not very expensive, a Chinese fir tree with a length of 16 cm still costs more than 200 yuan. So when you use beam trees, except the Chinese fir with the size of 16 or 18 for the main beam, other roof trees are mainly 12 or 14. Perhaps, everyone will think, for the main beam, is the bigger the tree, the better? In fact, 16~ 18 Chinese fir, compared with most rural buildings, the housing space of 4 meters is completely sufficient. If it is too big, it will not only waste the price, but also become a carpenter's burden because of the heavy weight when placing the beam.