Discussion Starter · #1 ·
Hi. We are installing new 9.5 " LVL floor girders to replace damaged 2x10" (9.25") girders. These sit on steel lally columns. One girder sits under a load bearing wall. The space from lally to bottom plate of wall is 9.75". The 9.25" 2x10 with 1/2" plywood subfloor totals 9.75". The new LVL being 9.5" would push the 1/2" plywood along with the wall on top, up 1/4". Don't want that, so one option was to cut the lally columns down 1/4". Another option was to put a 1/4" notch in the LVL where it sits on lally. And another, the way we went (now doubting in retrospect) was to cut out the 1/2" plywood under the bottom plate, just the strip bearing the load, and replace it with a 1/4" ply strip. This levels the wall properly. however, it concerns me because it breaks up the 1/2" plywood that spanned under the wall plate. We can attach blocking on both sides of the girder to attach the new ends of the old, but now disjoint, 1/2" ply, but the lateral support offered by the single piece is lost at this wall. Any one have concerns with the approach we are taking ?