That's A Lotta Warp

In contemplating an upcoming Very Large Project, I wondered how much warp can I put on my Macomber's sectional beam?  I've never had it anywhere near full.

And the answer, for 5/2 cotton at 10 ends per inch, is...

...we may never know, because I stopped at 80 turns.  On my 3/4-yard beam that means 60 yards.  More, I guess, since the circumference grows as the yarn piles up.

Now, it didn't really occur to me when I got the bright idea to do this little experiment, but what on earth am I to do with a 1-inch wide, 60-plus-yard long warp?