Its a traverse out along a lip of a cave so not quite a proper roof ie no feet except next to your hands. Similar to traversing along the gutter to your house when your feet can't touch the wall. But its as roof like at that grade that you will find in the mountains excluding knife blade cracks at piddo.
There is a roof at Mandalay on the Colo river (grade 22-24ish). Its behind the toilet block near the bridge. Bolts look crap and spaced. Very roof like though, goes for a few metres.