What do you think Building timber OK or not? I think we need to look at the use and price of construction timber first. We can't compare cheap construction timber with good quality construction timber.
Taking hemlock as an example, hemlock construction timber has good stability, so it will be so favored in the construction process. However, radial pine is not stable, because the temperature will damage the overall structure of radial pine construction timber, so compared with Tsuga construction timber, Tsuga construction timber is more prone to deformation and even "bow shaped" under the sun. Moreover, it is easier to break because there are large and many nodes, so the overall performance of Pinus radiata will be greatly affected. But for hemlock construction wood, with good temperature resistance, although these problems will have, but will not affect its normal use.
However, the imported construction timbers have good nail holding power. For example, when the nails are driven into two kinds of wooden squares at the same time, they will not have a strong sense of loosening, which is more conducive to the site construction. Moreover, if the surface is coated with preservatives, their anti-corrosion performance will become particularly strong. Therefore, to say whether the construction timber is good or not is relatively speaking. The consumption of the two kinds of imported construction timber is so large every year in China is not fraud.
In the same material, simply from the appearance to see whether the wood is good.
1、 Look at the tree Festival!
The knots of construction timber are also very important. If there are too many knots, it can only indicate that the raw materials may be relatively poor. If the raw materials are poor, we can also guess whether cheap grade wood is used.
2、 Look at the surface!
If there is a large amount of fresh construction timber, it may show that there may be a variety problem in this batch of raw materials. We can also speculate whether cheap grade wood is used.
In a word, it is better to choose the construction timber that is suitable for itself. According to the actual needs of the construction site, select the corresponding types of construction timber.