What is the difference between frames and tiers?
A locker frame consists of the vertical parts of the locker body. Frames are counted horizontally. A locker tier is the number of doors on each individual frame, counting vertically. For example: One frame with three doors from top to bottom is called a Three Tier locker. Eight frames of Three Tier lockers would be 24 locker doors (8×3=24). If you wanted larger locker openings, you could get Double Tier lockers – two doors from top to bottom.