exposed rafter
Architectural term for a rafter that is visible from below, often used in traditional Japanese construction.
In this old folk house, the exposed rafters are visible on the ceiling.
Compound of 地 (ji, 'ground' or 'base') and 垂木 (taruki, 'rafter'), referring to a rafter that is placed directly on the ground sill or is exposed. The reading じだるき is a specialized architectural term.