Sections of timber measuring less than 8 inches (20 centimeters) wide and from 2 to 6 inches (5 to 15 centimeters) thick; used for studding.

The dimensions and material thicknesses of frames, shell plating, deck plating, and other structures of a ship, together with the suitability of the means for protecting openings and making them sufficiently watertight or weathertight.