How many steel wires were pulled on the shed of Qiuyue pear?

Four lanes. Using the original grape cement columns, two grape cement columns were planted every 8- 10m. The cement column is 3.2 meters high and buried about 60 centimeters underground, forming a simple V-shape respectively. Bury stone piles in each row of pear trees, and fix and tighten the wire. Pull one wire every 60cm from the ground and four wires * * * to build a simple V-shaped frame. The angle of the frame can be adjusted appropriately.