04-09-2007, 05:26 PM
[quote Dakota]They don't sell 18" concrete tubes. The biggest is 12".
The biggest they sell by you is 12". I found a couple of sites online that have them. I do agree with MGS for the most part. Tubes/forms are more for building inspectors to look into a hole that you are going to fill with cement and know how deep/wide it will be, or for a nice finish above ground. If you have a kid that might be hanging off the rim, I would make it 4' deep.
The biggest they sell by you is 12". I found a couple of sites online that have them. I do agree with MGS for the most part. Tubes/forms are more for building inspectors to look into a hole that you are going to fill with cement and know how deep/wide it will be, or for a nice finish above ground. If you have a kid that might be hanging off the rim, I would make it 4' deep.