Which preposition to use with crossbeams

of Occurrences 2%

And above it the great crossbeam of wood Representeth the Holy Rood, Upon which, like the bell, our hopes are hung.

in Occurrences 1%

Morose flees for his life, and is found perched like a monkey on a crossbeam in the attic, with all his nightcaps tied over his ears.

Which preposition to use with  crossbeams