A specification that lists external dimensions, a wall thickness and a colour is not a specification, it is a size. It leaves the supplier to guess the load case, the handling and the internal layout, and it guarantees that two suppliers quote two different products.
Start with the movement, not the box
Where does it go, how often, on what, and what happens at each end? That paragraph is more useful to a designer than any dimension. A box that travels once a month on a truck has different requirements from one that is moved four times a shift on a trolley, even if the part inside is identical.
The load case, stated three ways
Contents weight, stack load at the bottom position and the intended stack height, and the maximum unsupported span if the box will be racked without a pallet. Three numbers, and a supplier who cannot quote against all three is going to default to the heaviest assumption and over-build, or to the lightest and under-build.
Handling, stated explicitly
Forklift, pallet truck, trolley, crane, by hand, or a mix. For each one, how the box is picked up and where it is contacted. This is what decides the base, the tunnels and the handholds, and it is the part of the brief that is most often left implicit and then argued about after delivery.
The inside, described properly
How many parts per box, how they are separated, which surfaces must not be touched, and how the operator loads and unloads. A sketch is worth more than a paragraph here. If the loading action is a drop-in from above, say so, because it constrains the internal layout more than any weight figure.
Environment and service life
Indoors or outdoors, washed or wiped, temperature range, chemicals in contact, and how many trips are expected. The expected trip count is the number that lets a supplier trade thickness against cost sensibly, and almost nobody states it. If you expect five hundred trips, say five hundred; the design will be different from one that expects fifty.
Identification, branding and printing
Box numbering scheme, colour coding, whether the customer’s logo appears, and where the marks go. Print inside a mould costs nothing after the first order and nothing to reprint, which matters on a route where counting boxes depends on the number being legible.
What to ask for back
Ask for a drawing, a weight, a stack rating, a beam span rating, a return nesting ratio and a spares list. Six deliverables, all of which are cheap for a real supplier and impossible for one that is reselling. Requesting them is a reasonable qualification test in itself.
The sections most specifications miss
Wear parts and how they are replaced. The out-of-service criteria. The return configuration. And the tolerance that matters for the application, which is usually squareness rather than panel thickness. Adding those four sections to a one-page brief typically removes a round of rework and one site visit. The wear-part discipline is set out in budgeting spares and repairs.
Keeping it to two pages
A specification that runs to ten pages does not get read by the person designing the box. Two pages, with the load case, the handling, the inside and the environment, plus a sketch, is enough for a competent designer and short enough to be read properly. Anything longer belongs in an appendix or in a conversation.
Send the part, or a drawing of it, with the brief. A single sample part removes more ambiguity than a page of description, and it lets the supplier check the assumptions rather than accept them. Where a sample cannot be sent, a dimensioned sketch with the contact points marked is the next best thing.
What we can do
We build PP honeycomb board boxes and will respond to a brief in this form with a drawing, a weight, ratings and a spares list. Send us whatever you have, including a part sample, and we will fill the gaps with you rather than guessing.