I am looking to remove a concrete 4-inch diameter post right in the center of my 20' by 20' garage, just to open up the garage a bit. There is a double 2 x 8 spanning the 20' width now, with the post supporting the center. Is this possible to remove this with the proper dimensions provided(I can provide more detailed dimensions). How can I determine what size beam to replace this with? Does anyone know of any websites that can calculate this for you?
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It can be done using the proper size beam. The beam will be rather large. (Probably in the neighborhood of 18”-20” tall steel “I” beam) A lot depends on what is above the garage as well as the span.
As for a website to calculate this, I think due to liability issues you will have a hard time fining one. Your best bet is to consult a structural engineer that will calculate the load for the existing structure. Another thing that must be considered is the footing size and the support columns or walls at the ends of the new beam and if they are large enough to support the additional load.
Glenn
