Driveway Gate

You need to figure out where your posts are going first, measure that distance from edge to edge, not middle to middle. Not sure what the gap should be on each side, but i'd think about 3" between the post and gate on each side would suffice.


And if you're doing one gate, your post is going to be long and heavy as shite. You're going to be burying that bastard a good 6 feet in the ground. It's a bitch digging that out if you're doing it yourself. I installed mine by myself, well, i needed two other guys to help put the post in, and hang the gate onto the post.

12’ is a LONG gate.

I would get a double swing gate and put the wheels on both sides. It’s better to over build than under.

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12’ is a LONG gate.

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My gate was 12' and on a single post.
That post is 6 feet in the ground, and i used i think 8 bags of concrete. That was installed 12 years ago and it still is doing just fine, no sagging.

If you're post is leaning from the weight of the gate, then you either have some really soft soil or you didn't get a big enough post.

Nothign wrong with going with a double gate though, but that means you have to buy two openers.