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Old 04-22-2017, 02:21 PM
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Driveway Gate Posts

I am wondering if my new gate posts could be bolted to concrete anchors instead of the traditional method of setting the posts in the concrete. I think with anchors and leveling nuts, it could be easier to set the posts perfectly in line and plumb.

It will be a two door gate, each gate measuring 8' high by 5'-6" wide. The gates frames will be made of steel, probably 1"x2" square tube, with redwood fence boards across it. I estimate that each gate should not weigh more than 200 pounds.

For the posts, I am planning to use 5"x5"x1/4" square tube which I will weld 12"x12"x3/4" plate to one end for a base plate. I will weld gussets between the post and base plate on all four sides for more rigidity. The base plates will have four 7/8" holes. They will be held down with four 3/4" diameter anchors set 24" deep in concrete with leveling nuts, hold down nuts and washers.

The two concrete bases will each be 2'-6" square by 3' deep, tied together by a 12"x18" concrete footing. All concrete will be reinforced with steel.

Does this sound adequate? Thanks.

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Old 04-22-2017, 03:59 PM
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JMHO, it sounds more than adequate.
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Old 04-22-2017, 10:00 PM
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Quote:
Originally Posted by WarNose View Post
I am wondering if my new gate posts could be bolted to concrete anchors instead of the traditional method of setting the posts in the concrete. I think with anchors and leveling nuts, it could be easier to set the posts perfectly in line and plumb.

It will be a two door gate, each gate measuring 8' high by 5'-6" wide. The gates frames will be made of steel, probably 1"x2" square tube, with redwood fence boards across it. I estimate that each gate should not weigh more than 200 pounds.

For the posts, I am planning to use 5"x5"x1/4" square tube which I will weld 12"x12"x3/4" plate to one end for a base plate. I will weld gussets between the post and base plate on all four sides for more rigidity. The base plates will have four 7/8" holes. They will be held down with four 3/4" diameter anchors set 24" deep in concrete with leveling nuts, hold down nuts and washers.

The two concrete bases will each be 2'-6" square by 3' deep, tied together by a 12"x18" concrete footing. All concrete will be reinforced with steel.

Does this sound adequate? Thanks.
I can tell you this, follow the link below. Ask this question as stated, they will know and make educated suggestions if needed, they don't mess around.

Greg

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Old 04-23-2017, 07:01 AM
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JMHO; if the drawing below is approximately what you have in mind, yes it will work. Granted it is a lot more work and cost than what "hcompton" suggests, but your question "is it structurally adequate", MHO, yes it is more than adequate for two 200-300 lbs gates spanning 11'.
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Old 04-23-2017, 08:18 AM
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It'll work. We have a single 14 ft gate, about 300#, built from a 1 1/2" square tube frame with rebar "posts" hung on a landscape timber (fence post) sunk in concrete. The timber is the old style (5 x 5) and the gate has a support wheel. It has been through numerous hurricanes (two severe ones) including Rita which knocked down all the fence boards, stringers, and half the posts, but that post and the gate were still standing. It did rip the arm out of the "Mighty Mule" operator, but that was not a surprise...

Russ
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