Gabel - Not really my project, I'm part of a team.

That's a 5" wrench with an 8' extension on the handle. That rod it's on (93 years young) is at mid span and is the smallest of the five at 2¾" - As is common in bridge work, Both the iron and the timber, the Braces and the Counter Braces, step up in dimension from there. The last Rod (the inboard ends of the end Panels) are 3½" in diameter and have 6" nuts.

The wrenches were made by a fabricator neighbor of mine who has been replicating bridge parts for us for years. This time around he also made replicant Nuts - Three of the 6" nuts were stolen while we were in the middle of dismantling.

A shot of both wrenches and the replicant nuts with an original.