I am closing in an 8'x7' garage door with a wall and 32" exterior entry door to make more space in our family room. The floor will be raised to meet the existing floor which will elevate the new exterior entry door. I need to cut and raise the garage header for the door jamb to have 81 1/2". Width of new header is 37" long.
The wall was installed therefore supporting the existing headers with 2'x4' 16" o.c. leaving 34" unsupported for the door jamb.
Can I cut the remaining header without supporting the 2nd story above since it will only be 37"? I plan to raise the header and reinstall with jack and king studs. Thank you.