Plastic Knock-Down Bin Sizes & Capacity: A Buyer’s Guide

Collapsible plastic bins solve a specific problem steel bins don’t: what to do with the container when it’s empty. Here’s what to look at when sizing one.

Collapsible, Knock-Down Design

These bins were originally developed for the auto industry to carry OEM parts to assembly lines, and the core advantage is still the same: when empty, the sides collapse (knock down) flat, saving significant space in the warehouse or in transit compared to a rigid container. Standardized heights across models make stacking straightforward whether bins are assembled or collapsed.

Access Doors

Most knock-down bins have half-drop gates for access — some models have 2, others have 4, depending on size and manufacturer. More access doors mean easier loading/unloading without lifting the bin off a rack or pallet.

Floor Type

Depending on the model, floors are either solid or grated/vented. Vented floors allow drainage and airflow, which matters if bins will be stored outside or exposed to the elements. Solid floors make more sense for indoor use where drainage isn’t a factor.

Forklift Handling

These bins are typically built with 4 runners on the base for 4-way forklift entry, and the runners help prevent the bin from tipping off the forks when travelling over uneven terrain. With light loads, some models can also be rotated on the forks.

Capacity Considerations

Capacity depends on wall thickness and floor/runner construction, similar to steel bins — don’t assume two bins of the same outer dimensions carry the same rated load. See What “Reconditioned” Means for Plastic Bins at RDR for what to check on a used unit, or browse current Collapsible Plastic Bins inventory.