With the continuous expansion of the application scope of building square wood, the imported building wood ( imported wood side ) can be seen. Whether indoors or outdoors, Fangmu can be seen in various forms in people's lives. It is also easy for us to see the squares that are cracked due to improper maintenance, such as in parks, some seats on the side of the road. Compared with the outdoor, the indoor cracking of the square wood is better avoided. Generally speaking, the moisture content of the wood is between 8% and 12%, and there is no cracking or warping during use. Judging the water content of the wood, it can be easily judged from the drying method of the wood. At present, the drying method of wood is dried and naturally dried. The drying effect of steam drying is good, and the wood often dries thoroughly and the material is stable. Naturally dry wood is prone to cracking.