Wiktionary
n. A wooden beam supporting a wall, ceiling etc. which has been left uncovered by plasterboard for aesthetic effect, typically seen as imparting rustic or traditional charm.
Usage examples of "exposed beam".
But as he was being pulled out, his rope became caught in an exposed beam whose underpinnings were rotted by time.
Dengar scrabbled aboard the curved metal, nearly a meter in width, and climbed the rest of the way up to where the barge's bow had been, and now only the exposed beam was left, tilted into the cloudless sky.
In a habitual motion that dated back to her childhood aboard the ship, she reached up and put her palms flat to the exposed beam of wizardwood overhead.
Every exposed beam and post, board and railing had been carved with care and attention.
He ducked under an exposed beam, and went into the lounge which overlooked the garden behind the cottage.