If the diameter of the pole being set is 10 inches, what should the diameter of the hole be?

To determine the appropriate diameter of the hole for setting a pole, it is essential to consider the need for sufficient space to allow for proper installation, including placement and backfill. Generally, a standard recommendation is to make the hole diameter approximately 1.5 to 2 times the diameter of the pole.

In this case, with a pole diameter of 10 inches, multiplying it by 1.5 gives you 15 inches, and by 2 gives you 20 inches. While both values suggest a hole larger than the pole itself, among the options given, a 16-inch hole is the most practical and closest fit, ensuring enough room for stability and adequate backfill.

A hole diameter of 12 inches may not provide sufficient space for maneuverability and backfilling, while 14 inches could also be slightly tighter than recommended. A hole of 18 inches, on the other hand, exceeds the necessary size, resulting in an unnecessary excavation. Therefore, a 16-inch diameter for the hole serves as a balanced choice for effectively accommodating the 10-inch pole while still allowing for proper installation practices.