Built so that the timber framing shows and forms the design as seen from within, as the roofs in many English churches and halls of the fourteenth and fifteenth centuries.
The Century Dictionary (Public Domain)
Use "open-timbered" in a sentence
"Tables had been spread in the apartment which lent its name to the whole building — the hall proper — covered with a fine open-timbered roof, whose braces, purlins, and rafters made a brown thicket of oak overhead."
"Still on general course bearing of 95 1/2 degrees over open-timbered, well-grassed land."
"Forest country, as distinct from scrub, is open-timbered country, with little undergrowth, and no vines or other creepers."