平瓦屋面和中瓦屋面的木基层中,多数要用到木椽子,有时工地上购进的木料是圆木。怎样锯才能更好地提高木材的利用率呢?现将巧锯圆木(直径以12～16厘米为宜)的方法(见图)介绍如下:1.先把圆木照图1画线;2.再锯成图2形状,照图2画线; Most of the wooden bases in tile roofs and mid-tiled roofs are made of wood, and sometimes the logs purchased on the construction site are round logs. How can we better improve the utilization rate of wood? Now the method of sawing circular logs (12 to 16 cm in diameter is appropriate) (see figure) will be described as follows: 1. First draw the round wood according to Figure 1; 2. Then saw the shape of Figure 2, according to Figure 2 drawing line;