Hole Height
1/3 of the length of the post (a 1.8m post requires a hole depth of 600mm)
Hole Width
2× the width or diameter of the post (a 100mm × 100mm post requires a 200mm × 200mm hole)
1/3 of the length of the post (a 1.8m post requires a hole depth of 600mm)
2× the width or diameter of the post (a 100mm × 100mm post requires a 200mm × 200mm hole)