notching basement stringers to accomodate new wall?

Finally working on plans for finishing the basement, and have run into a minor detail. We want to put up a wall running beside the center I-beam. Problem-The stringer for the basement stairs runs within a quarter inch of the top of the I beam. I\ \
Is it acceptable to notch the bottom of the stringers so we can fit the top plate into that space? The stringers are 2X12, and I would need to cut a notch the size of a 2X4 for the top plate.
Comments? Suggestions?
Mike remove X's for email
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file

Site Timeline is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.