Positioning the bar – Correct is important when embedding wooden posts in holes that are then filled with rubble and earth or concrete, vertical positioning them. This will make it easier to nail two boards to the post, which will lean obliquely on the ground. By displacing the ends of these boards and controlling the position of the post with a plumb line or with a spirit level, you can accurately position the post vertically, and then proceed to the planned settlement. The ends of the boards should be slightly tapped into the ground.