Hi Folks,
I had two 16" concrete footers poured in my backyard, and placed bolts in the concrete using a plywood template to get the spacing right for a steel pier.
Questions:
1. How long should I keep the plywood template on top and keep the concrete covered? I've had it on for a week.
2. It will take me several months of weekends for me to build the observatory around the piers. Should I keep them covered to avoid the bolts rusting or is it better to let the concrete be exposed to air?
Thanks,
Ben
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You can certainly remove the plywood template by now to allow the concrete to fully dry. When I did mine, I used galvanized nuts and bolts to prevent rust.
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OK great thank you; yes I used galvanized nuts and bolts too so that should help.
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Certainly agree with Bruce - the template can be removed now. Exposure to air is key to allowing the concrete to ferment and harden. I removed the plywood template after 2 days, although this was in July, and the temperature was very warm. You should still be fine. - - Steve  |
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I had two 16" concrete footers poured in my backyard, and placed bolts in the concrete using a plywood template to get the spacing right for a steel pier. Just to be on the safe side, you did use L type bolts right. If not, you may want to start over. A regular bolt will not stay in the concrete for long.  |
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Yes that's exactly what I used
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You’re ready to build. FYI, I used straight, half-inch stainless steel threaded rods, with several nuts on each one for the concrete to grip. Ten years and it’s all still solid as a rock, which it is.
CS, Bob
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