Robert Allison wrote:

Edwin Pawlowski wrote:
"Joseph Meehan" wrote in message

Well few builders will put a beam in larger than necessary to carry the
weight of the structure. You need to know what it is already supporting.


Once you determine that, I'd still put in a vertical support under the beam
while I was doing the lifting.



And I would make the vertical support have a very large base
in order to NOT crack my concrete floor with a point load.

Good point.