1. Workers need to determine the installation position with tape first, usually install it contour sign 15-30 meters away, and pay attention to ensure that the contour traffic sign is on a straight line during construction
2 use the impact drill to make a pit
with length, width and depth of 200 at the designated position, insert the prepared reinforcement into the middle of the column vacancy, put it into the pit, and then pour the well mixed cement and sand into the pit for filling, beating and pressing to
ensure the column is vertical.
