Started work on the fuselage roll bar, which mounts on the bulkhead immediately aft of the cockpit seats. It protects the crew from crush injuries if the aircraft flips onto its back on the ground. The roll bar consists of a front assembly (left and right halves), an identical rear assembly, and two straps that connect the two halves.
First step was to prep the aft half of the channel and fabricate several pairs of angle brackets used to mount/attach the roll bar to the fuselage bulkhead.