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What size concrete post for 6ft fence with gravel board
Most advice seems to talk about 6ft panels on their own, but I’m not clear how much extra height the gravel board adds or how that affects what post size is actually correct.
Expert Trade Answers
"For a standard 6-foot (1.83 m) high fence with gravel board, the most suitable concrete post size is 8 feet 6 inches (2.6-2.7 m).
The total height of the structure above the ground consists of the height of the panel (6 feet) and the height of the gravel board (usually 6 or 12 inches):
6' + 6" Construction: Total height above the ground will be 6' 6" (1.98 m). Given that the post must be buried at least 2 feet (0.6 m), the total length of the post must be 8 feet 6 inches.
6-foot + 12-inch construction: For this height, 9-foot poles are required to ensure a secure anchorage in the ground."
The total height of the structure above the ground consists of the height of the panel (6 feet) and the height of the gravel board (usually 6 or 12 inches):
6' + 6" Construction: Total height above the ground will be 6' 6" (1.98 m). Given that the post must be buried at least 2 feet (0.6 m), the total length of the post must be 8 feet 6 inches.
6-foot + 12-inch construction: For this height, 9-foot poles are required to ensure a secure anchorage in the ground."
Answered on 11th Feb 2026 - Member since Jan 2026 -
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