I have an i-beam that runs the length of the basement. For the majority, there is sufficient space to build out an enclosure but for a section of about 3' there is nothing for me to attach supports.

I am trying to determine the best method for enclosing the ibeam so that I can hang sheetrock. The sheetrock must be flush with the ibeam so as to maintain plumb with the existing wall. I have a 2*4 secured underneath the ibeam but the rafters for the first floor do not provide an attachment surface. I was debating drilling through the top of the ibeam to secure another 2*4 but attaching to the inside of the ibeam. Is this recommended?

thanks

 

The size holes you would need should not do any harm to the structural strength of the beam. I see no problems in your idea. good luck with your project.

 

With the joist at 16" on center and you have what a 2X4 on the bottom of the beam and a 7" beam. Id hang the ceiling drywall then the drywall on the wall there the top screws will only be 8" down from the top. After you tape it it wont go anyplace. "If I have this right what you have"

ED