Reinforce wood beam
Reinforce wood beam
(OP)
Hi everyone,
I'm a mechanical engineer (machine design) and I would like to remove a supporting column in my basement. I will eventually figure out what is the load psf (plus adding a few feet of snow). I've attached a drawing to make things clear (see link below)
(http://files.engineering.com/getfile.aspx?folder=b0ff111a-e428-41d1-b629-8ec8192e3b7a&file=Basement_drawing.pdf)
The 6" x 9" wood beam is actually supported at both ends by the foundation. Additionally, there are 2 columns. I would like to leave one in place and remove the other one. The span would go from 12 feet up to 20 feet.
My first idea was to add either 1 wood beam on each side or 1 C channel on each side. The new beams would not be supported at each ends. I can't add anything underneath because the head clearance is already small.
My questions are: what type of connection can be used and what is the best approach to calculate the stress and deformation of the new assembly?
Thanks to all!
I'm a mechanical engineer (machine design) and I would like to remove a supporting column in my basement. I will eventually figure out what is the load psf (plus adding a few feet of snow). I've attached a drawing to make things clear (see link below)
(http://files.engineering.com/getfile.aspx?folder=b0ff111a-e428-41d1-b629-8ec8192e3b7a&file=Basement_drawing.pdf)
The 6" x 9" wood beam is actually supported at both ends by the foundation. Additionally, there are 2 columns. I would like to leave one in place and remove the other one. The span would go from 12 feet up to 20 feet.
My first idea was to add either 1 wood beam on each side or 1 C channel on each side. The new beams would not be supported at each ends. I can't add anything underneath because the head clearance is already small.
My questions are: what type of connection can be used and what is the best approach to calculate the stress and deformation of the new assembly?
Thanks to all!






RE: Reinforce wood beam
RE: Reinforce wood beam
1) The existing column may have to get bigger because it will be supporting more load including the foundation possibly. Also the end walls will see more load but I assume they are masonry or concrete and should not be really effected.
2) Check the wood beam for bearing at each end because the new reactions will be carried by the existing beam alone if the add-on does not go to the end.
3) I would calculate the stress assuming the new beam carry everthing (except for the bearing) or you can to a composite type section but slippage may change what load goes where.
4) The connections you have are fine with the thru-bolts. The loads due to your house are probably very small and what you are showing should be fine.
And if you are comfortable removing columns from YOUR house I guess everyone else should be too.
RE: Reinforce wood beam
be VERY careful as to where discontinuities in the existing beam occur. even with supplemental steel/wood bolted to either side, if there's a "break" in the older material you don't have full moment capacity of the section.
I would just shore your floor system, remove the old beam on the left side of the floor plan, and place a new one that spans to that new wall you're building.
RE: Reinforce wood beam
BA
RE: Reinforce wood beam
RE: Reinforce wood beam
Regarding the beam, the shear will be almost doubled, the stress tripled and the deflection more than quadrupled. You still need to check the footing(s), column size, and connections.
Mike McCann
MMC Engineering
RE: Reinforce wood beam
Best to hire a structural engineer.
Regards,
MDJ
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