Marked centerline on lower brackets and marked line for holes on struts as indicated in plans. Marked hole locations on strut using plans and rivet fan to locate. Drilled pilot holes in struts. Positioned brackets and drilled and cleco'd. Sequentially drilled to final size and passed AN4 bolts through struts and brackets. Disassembled for debur and prep, then reassembled and torqued nuts to 70 in/lbs.