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Posted by Glenn on May 17, 2007, 5:46 pm
Frankly, I would be more concerned about what the moved posts are
sitting on.
> On 17 May 2007 08:03:35 -0700, dfleck1@gmail.com wrote:
>
>>I have an 8"x5" steel I-beam in the basement spanning 30' with a
>>single post in the center supporting one floor and a roof. I
>>would
>>like to move one post to 8' and would like to know how far in
>>from the
>>other end I would have to add an additional post. I'm trying to
>>open
>>up the space for a recroom.
>
>
> saying 5 x 8 steel I beam doesn't tell us enough to give you a
> meaningful answer. The thickness of the steel in the web, and
> plates
> is an important factor.
>
> That said, steel is not as strong as many people think it is.
> Right
> now you have two 15' spans if there is a single support in the
> middle.
> Were you keep that 15' maximum span (not a good assumption, only
> an
> engineer can pinpoint the load points), then were you to move
> the
> support to 8 ft from the end, then then next support would need
> to be
> at 8 + 15 ft, or 23 ft. Safer might be just to use two: one at 8
> ft
> from each end.
>
> But: get an engineer (as the other poster suggested) to evaluate
> the
> situation.
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