The Nebraska-based folks behind Levrack had a problem that those of you with shops will recognize. "Our shop was in need of a storage solution," they write. "Every type of shelving that we tried seemed to add to the clutter, and take up much needed wall space."
You've undoubtedly seen the "mobile aisle" solution that libraries (and Lego HQ) use to cram a lot of storage into a limited footprint. That system is efficient, but requires laying tracks in the floor. So Levrack's developers did the mobile aisle one better: