I have a load bearing wall with a 32" door w/ a 2x12x37" header. I want to expand this opening to 56" with a 59" header. The current header is a double 2x12. I want to know if I can use a double 2x8 w/ .5" osb sandwitched in between. My goal is to raise the height of this doorway. Will a 2x8 header be ok?