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Posted by on May 18, 2008, 2:20 pm
On Sun, 18 May 2008 18:02:54 GMT, "Thomas G. Marshall"
>
>
>There was a person I was speaking to recently who was proud of what he
>considered to be a very bright move on his part.
>
>He had noticed that the lolly-columns in his basement had been filled with
>cement prior to being used. He assumed that the strength of the support was
>in the cement, and therefore concluded it was a good idea to try filling PVC
>tubes and using those as posts (note-not as sonno-tubes, but as fully
>structural support posts).
>
>I pointed out that I thought that the strength of a lolly was in the steel,
>and that the cement was there merely to ensure that it was never dented,
>causing it to fold like an aluminum can. I was concerned that the first
>major frost heave under his deck that is able to stress the ledger enough to
>pull outward a small amount would cause his pvc+cement "posts" to break.
>
>Was I right?
>
>
The concrete in steel lolly columns is to help keep them from collapsing in a
fire.
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