Wondering what preferences are here. Floor is 11 7/8" TJI. There is a 4' wide staircase cutout that runs parrallel to I-joists right in the center of the floor. Doubled up the TJIs (with blocking between them) on either side of the staircase. Now I need a double header located directly above the bottom of the staircase for two more TJI to attach to.
Do you guys prefer to use LVL for this header, or just a double TJI with blocking? We always used either 2x lumber or LVL for this, but I've got extra TJI, if that will work. I've also got extra rimboard that I could double up.