also known as: floating panel, frame and panel
A flat board that fits into a frame, often allowed to float in grooves so it can expand and contract with humidity.
Allow 1/8" gap on each side of the panel for movement.
Like a dado, but cut with the grain. Used in frame-and-panel construction to hold the panel.
Shrinkage across the annual rings — the wide dimension of a flatsawn board. Always greater than radial shrinkage; usually about twice as much.