A freestanding plastic shelving unit rated to 300 lbs in total with each shelf carrying up to 100 lbs, standing 37 inches tall on a 24 by 12.5 inch base so it climbs rather than spreads. Clearance between shelves is 14.5 inches, generous enough that a detergent jug, a paint can, or a stacked pair of bins slides in upright instead of being laid on its side to fit. The whole unit is molded from PP, which changes what it can be asked to do compared with a metal rack: the surface is waterproof, so a damp basement floor or a spilled bottle does nothing to it, and it will not rust or stain the items resting on it. The plastic is also anti-crack and finished with an anti-slip texture that keeps stored goods from sliding when a shelf is bumped. Structurally, robust crossbars run underneath each deck and side reinforcements stiffen the frame, and two anti-toppling devices anchor the unit once it is standing. The modular design is the flexible part: shelves combine into one tall run or separate into shorter stacks to fit under a counter or beside a machine, and the whole thing can be reconfigured later. Assembly is tool-free and follows a simple sequence of inserting supports and columns, connecting each shelf, then capping the top layer. The empty unit weighs 7 lbs and suits a garage, pantry, basement, kitchen, or laundry room.