A machinery case must protect the equipment through the handling and storage conditions in its shipping plan. The number of plywood layers is only one part of that design. Start with the equipment drawing, weight distribution and handling instructions before comparing a framed case with a layered wall construction.
Define the construction before comparing it
A reinforced single-wall case uses plywood panels with a separate frame. A supplier's term “triple-wall” can describe different layered constructions. Ask for a section drawing showing each material, its thickness, the joints and the base. Neither label establishes a load capacity.
Compare the complete case, including the support under the equipment, restraint, walls, lid and connections. A thicker wall does not by itself establish that the base, joints or lifting arrangement can carry the load.
Information the packing designer needs
- Equipment dimensions, gross packed weight, centre of gravity and permitted support points.
- Fragile parts, surface finishes, moisture sensitivity and any prohibited contact areas.
- Every planned handling method, including the equipment available at collection and receipt.
- Whether stacking is permitted, and the storage, weather and transport conditions.
- Any buyer-approved packing drawing, test method or acceptance requirement.
Compare proposals on the same basis
| Part of the proposal | What to confirm |
|---|---|
| Panel and frame | Material, construction, finished dimensions and evidence relevant to the design. |
| Joints and restraint | A documented connection and restraint design matched to the equipment and handling plan. |
| Handling | Approved handling points, instructions and the responsible designer's acceptance. |
| Protection | Required moisture barrier, cushioning and inspection access, with compatibility confirmed. |
| Acceptance | Drawings, inspection stages and any agreed test before dispatch. |
Fastener sizes, spacing, tightening requirements and lifting arrangements belong in that design. They cannot be selected safely from a generic wall label or the cargo weight alone. Have the responsible packing designer resolve these points before manufacture.
Illustrative planning example
Consider a machine with a tall centre of gravity and a delicate exposed assembly. A buyer comparing two case proposals would ask each designer how the equipment is supported and restrained and how the same handling plan was assessed. This is an illustrative enquiry scenario, not a completed Cochin Wood delivery or a claim that one wall construction prevents every failure.
Prepare a material enquiry
Use our packing plywood details to discuss the panel specification, and the crate and pallet buying checklist to organise the brief. For the route itself, see container and break-bulk packing questions.
Send the drawing and packing brief with quantity, delivery point and the required documents. The written quotation confirms the material and work included; any required design or testing must be agreed explicitly.