ribbed floor

The skin of her legs flayed along the hard ribbed floor.

She was in the cargo hold, standing on the ribbed floor of the shuttle next to the loading hatch.

They crawled along the ribbed floor in darkness.

He took one step and braced himself firmly against the ribbed floor of the gangway to counteract the jolt of gravity in case a neutralizer had been left intact.

I did not want that, not even a little bit) So I stood unmoving on the ribbed floor of Starbiter's mouth, staling forward at the creature's yawning throat.