Greetings all from the House From Hell.
On tonight’s entertainment: how to replace a beam that was undersized when it was installed, then cheerfully hacked above and below by hack remodellers. I have an engineer. I was hoping to get away with sistering, but he says that because it was undersized (4×10 over 11′ span) the sisters (LVLs) would have to go all the way to ends and be supported. On one end, a corner of an inside wall could be built out to add support; at the other end, there’s a stove and cabinetry. Kitchen remodeling is not an option. I am trying to figure out how to support the load above while taking out the old beam. The situation is that this is over a kitchen, holding up second floor load-bearing wall and roof. The only good news is that the room above is gutted, nothing but joists and ceiling. There is though a failing splice in the top plate of the second floor wall, currently held together by a 2×10 header retrofitted into a window RO under the splice (was this house built to fail or what?). There is no bottom plate, the second floor wall studs all sit right on the beams (which are visibly deflected, one about 3/8″ more than the other). I’d appreciate a reality check on my plan:
- Fasten a 2×6 ledger to the bottom of the second floor wall studs, Simpson 1/4″x4.5″ screws. Then fasten a 2×4 ledger to this. This gives a 3″ bearing for studs from the kitchen floor below to hold up this ledger. This takes the load of the wall and roof above. Studs fastened to 2×4 bottom plate that sits on tile floor in kitchen. Perhaps run strap ties to 2nd floor joists to prevent the wall falling out.
- Put supports (plates and studs) under ceiling joists on one side of beam, 2nd floor joists on other side of the beam, to hold them up when the beam is cut away.
- Cut the joists, cut 2nd floor studs 1.5″ above beam, cut away the beam.
- Bottom plate for second floor wall.
- Build the beam (2 9-1/4″x1-1/4″ LVLs with 3/4″ plywood spacer, or maybe just 3 layers of LVL) in place (easier to negotiate it in in pieces rather than try to squeeze the whole thing in).