Measure, mark and cut the interior panel of the block the T is joining, (block A) to the width of the cavity. Butt the intersecting block, (B) flush to block A. Tie the first cavity web of block B to the closet cavity web of block A.

Tape and foam joints. Brace T-sections at intersecting points for extra support.

T-sections should be braced with a 2" x 10" across from the abutting wall and 2" x 4" 's on the outside corners