The specifications for the 2015 Winnebago View 24J lists height at 134 inches.  That is 11 feet 2 inches.  I always figure in a 4 inch fudge factor and will not go under anything below 11 feet 6 inches.  Check this photo of us getting diesel fuel:

Limbo, How Low can You Go?

The attendant came running out as I approached, a look of amusement bordering on horror on his face.  As I slowly swung to the pump his expression changed and he signaled thumbs up.  “11’6” works, I’d avoid anything under 11’”, he said.  I was thinking this is as low an overhang as I’ll go under.  11 feet would sheer something off the rig’s top.