We live in an antique cape and have 2x6 joists. My builder is making extra headroom for a staircase in our living room which involves reinforcing a couple joists with 2x6 LVL. Which is the best option to attach the LVL to the joists? I have seen many people recommend through bolts but would that weaken the structure if it is only 2x6 joists? If nails are better, is there a general rule of thumb for how many and placement per 16"? I'd like to know the best way to attach and specifically how.
Use the Simpson SDW22300 screw installed 6" on center alternating 1.5" from either edge, and starting 3.5" from the end.
This detail is for a built-up column, but it's the same idea.
Doing it this way is overkill. It's probably possible to do something similar with 10d nails, but that's more than I know how to do.