Water leaking through gunner's opening cover

When water is allowed to pool on the turret cover on my deuce, it will easily leak through, and I can tell much of the rust inside the cab is from many years of such leakage and resulting humid interior conditions afterward.

Is a bar like this to prop up the cover just something I need to fabricate, or can it be found somewhere?

Yes with out having some kind of bow the water won't run off.

I think the question asked by the OP is whether there was ever an "official" part developed to remedy the water pooling problem.
I would speculate that the military would probably not have had a need for this because if the truck were in use then the water would not have a chance to pool, and the personnel inside probably would have just cleared the water off manually. If there were a brace of some sort, it would undoubtedly interfere with the use of the gunner's station.
Unless you plan on stationing a gunner in your cab, I'd probably just fab something up to do the job.

Thanks, both of you.

Yes, I was wondering if there was an official part, but that explanation makes perfect sense.

But there's an idea, forget fabricating up a part, just start putting together your own little army. First opening: "Permanent deuce gunner."

Some folks likely started with an ornament, or a "better half", while others have taken the long term approach to "grow" their own!

Guess I better fabricate a bar...


Hahaha

Well played!