Guides

Choosing the container

Five guides cover the choices you make before anyone talks price. 48x40 vs 48x45 explains the two North American bulk footprints and why automotive standardized on the wider one. Nestable vs stackable sorts totes that drop inside each other from crates that never do. Vented vs solid covers walls and decks, airflow against containment. Drop doors explains why a tall bin needs a way in from the side.

The fifth, plastic vs cardboard, is the honest comparison: corrugated is cheap per trip and gone after one, plastic costs more up front and earns it back over many trips, but only if the boxes actually come home. A 2005 USDA rule on South Florida avocados is a good reminder of that last point; its record counted hundreds of plastic field bins lost in a single season.

Freight, folding and stacking

Empty containers are mostly air, and the guides in this group are about paying less to move it. How collapsibles fold walks through the walls, latches and doors of a folding bulk unit, and what to check when one will not lock. Return ratio defines the number makers print on every collapsible sheet and shows how to use it. Trailer loads turns those ratios into counts per 53-foot trailer, standing and folded.

Stacking limits separates static stacking, in a warehouse at rest, from dynamic stacking, on a moving truck or forklift. One ORBIS 48x40 sheet lists six high static and three high dynamic, and that gap is typical: motion multiplies loads. Returnable packaging steps back to the program level, with how closed loops are set up, counted and kept from leaking containers.

Used containers and condition

Used container grades explains grade A, B and C as we apply them, box by box. It covers what each grade allows (scuffs, labels, repaired latches, missing pins), what it rules out (cracked corner posts, warped decks, doors that will not latch), and how to spot-check a delivery against the grade on the quote. Large pooled fleets work the same way; ORBIS says it grades returned containers by condition rather than retiring them at a set age.

Food contact

Food contact is the guide to read before a crate touches anything people eat. We do not certify containers, and this guide says why: compliance depends on the resin, the maker's documents and what the box has carried since it was molded. It lists the questions to put to a maker and the history to ask about on a used lot. Where a maker states that a material meets a regulation, we quote the maker and link the source.

All twelve at a glance

Words the guides use

• Footprint: outside length and width of the base, the size a trailer floor or rack sees.
• Tare: empty weight. It counts against payload and against what a worker can safely lift.
• Collapsed height: how tall a folding unit stands once its walls are down.
• Return ratio: standing height over folded height, roughly how many empties ride in the space of one full unit.
• Static and dynamic stack: how many loaded units may sit on one another at rest, and in motion.
• Picture-frame base: a continuous bottom rim, kind to conveyors, rollers and rack beams.
• Dunnage: dividers, trays and inserts that hold parts apart inside the box.
• Macro bin: a one-piece rigid harvest bin, square and close to pallet size, made vented or solid.
• Nest-stack: a tote that stacks when rotated one way and slips inside its twin when rotated the other.
• Grade A, B or C: our condition scale for used units, from near-new to worn but working.

How the guides are written

Numbers come from maker sheets and trade sources, linked at the foot of each guide with the date we read them. Makers do not always agree with each other, and a sheet sometimes disagrees with itself, so we give ranges and say when a figure needs checking. General trade knowledge, such as what a drop door is for, is written plainly without a citation.

The guides do not sell a particular model. When one answer depends on your load, the guide says so and tells you what to measure. For a container named and quoted, send the details through the quote form; for a quick question, questions and answers may already have it.