Da, it’s what they’re doing. It’s all-thread. Teach the young ones how to wield a wrench with a double-nut for counter-hold. Draw or thread the all-thread out instead of taking a mighty swing with a sledge. The new rib is just lying in place, so access is not lost. The “tree nails” in the adjacent rib are driven from this side. No “tree nails” in the new rib, yet.