I am building a 14ft driveway gate and 2ft brick columns on either side of the gate. In thinking about the concrete footings I had a couple of questions.
1. For footings in expansive black clay soil, what is recommended depth for driveway gate posts (8ft tall 5in square steel posts) in this type of soil? The clay absorbs water like no other, but when it dries, it is hard as a rock and cracks. The gate company had a standard recommendation of at least 18" square hole, at least 3' in depth. I thought maybe 2' square footing at 3ft, but I didnt know if it was overkill.
2. For the footings for about 6' tall brick columns 2' square, I was thinking around a 3' square footing, but wasnt sure on the depth of that footing.
The gate will weigh in the neighborhood of 330lbs, single swing off just one post.
Both of these footings would be connected in one pour (see picture)
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1. For footings in expansive black clay soil, what is recommended depth for driveway gate posts (8ft tall 5in square steel posts) in this type of soil? The clay absorbs water like no other, but when it dries, it is hard as a rock and cracks. The gate company had a standard recommendation of at least 18" square hole, at least 3' in depth. I thought maybe 2' square footing at 3ft, but I didnt know if it was overkill.
2. For the footings for about 6' tall brick columns 2' square, I was thinking around a 3' square footing, but wasnt sure on the depth of that footing.
The gate will weigh in the neighborhood of 330lbs, single swing off just one post.
Both of these footings would be connected in one pour (see picture)