Old Chicago Home Offset Deflection Wall Steel Beam
Old Chicago Home Offset Deflection Wall Steel Beam
(OP)
I am working on a chicago home that has a steel beam running down the center of the basement with wood 2x10 joist floor framing clear span 24'. On the first floor there is a 2x4 deflection wall that runs parallel with the steel beam below - with the wall being offset 8.5" O.C. from the steel beam (6" flange, 6" deep).
I am creating an opening of 10' in the deflection wall and will use a(n) LVL(s), however, now doubling up 2x4s for columns on either side of the beam will leave a point load that is offset from the beam.
Does anyone have a good detail or idea for this?
Thanks
I am creating an opening of 10' in the deflection wall and will use a(n) LVL(s), however, now doubling up 2x4s for columns on either side of the beam will leave a point load that is offset from the beam.
Does anyone have a good detail or idea for this?
Thanks






RE: Old Chicago Home Offset Deflection Wall Steel Beam
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Old Chicago Home Offset Deflection Wall Steel Beam
RE: Old Chicago Home Offset Deflection Wall Steel Beam
By the way, 24' is a long way for 2x10's to span. That would be a deflection issue.
RE: Old Chicago Home Offset Deflection Wall Steel Beam
RE: Old Chicago Home Offset Deflection Wall Steel Beam
I say deflection wall to mean a wall that is under joists which spans past the top of the "deflection" wall - yes it is a bearing wall (because 2x10 spanning 24' would not work), but there is no connection. This is typical old home chicago construction - most joists even 2x8's run clear span 20'-23' with intermediate walls that are offset from the basement beam.
The 2x10 run east-west at the 1st and 2nd floor. The beam runs north south under the first floor.
The walls are an exisitng condition. There was openings in the wall for a doorway. I am expanding the opening of the doorway from 3' to 10'.
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Thanks
RE: Old Chicago Home Offset Deflection Wall Steel Beam
By the way, I agree too that a 24 foot clear span for 2X10's is excessive.
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Old Chicago Home Offset Deflection Wall Steel Beam
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask