Now to position the first bottom hinge plate.
- Height (a): Use the point of the hinge plate as shown below on figure 3 to mark width. Take the measurement (as shown in figure 2) and add ground clearance (50mm). Mark a line on the top of the hinge plate.
- Width (b): Come in from the edge of the pillar by 25mm to 50mm. You need this clearance to protect the pillars corner when drilling a hole. Mark one vertical side of the hinge plate.