Choose for a use, not for a reputation
Saying "aluminium is light" or "steel is strong" is not enough. The result depends on the thickness, the shape, the joints, the quality available and the making tools.
ChatGPT can organise the comparison. The final characteristics must come from supplier documents, suitable calculations and tests.
Four families to compare
Plywood
Easy to cut, modify and repair. It can be attractive for a prototype or an accessible build. You need to study the weight, moisture, edge wear and the hold of the fixings.
Aluminium
Can offer a good ratio of mass to stiffness depending on the design. It calls for suitable joining processes, care with the edges and an often higher budget.
Steel
Allows sturdy structures and common joints in an equipped workshop. Weight, corrosion, welds and surface protection must be taken into account.
Panels and technical polymers
Often resist moisture well and can be easy to clean. Stiffness, creep, joints, repairability and local availability must be checked.
Compare the whole system
| Criterion | Useful question |
|---|---|
| Mass | What will the weight of the complete structure be, joints included? |
| Stiffness | Does the top stay stable enough during the planned tasks? |
| Assembly | Are the tools and skills needed actually available? |
| Repair | Can a damaged part be replaced simply? |
| Environment | Are moisture, dust, impacts, temperature and the products used compatible? |
| Cost | Does the price include offcuts, hardware, finish and transport? |
| Safety | Are edges, splinters, pinch points, stability and failure behaviour under control? |
Compare these materials for the attached concept. Use only the data I provide or clearly cited sources. Separate the raw material's properties from the finished structure's performance. End with the missing data and the tests needed before any decision.
Prepare the questions for the supplier
- What exact reference is offered?
- What thickness and what tolerances?
- What weight per panel, profile or metre?
- What joining processes are recommended?
- What use limits or precautions are stated?
- Are the technical documents and certificates needed available?
- What lead time, minimum order and delivered cost?
Avoid the single choice too early
The prototype can mix several materials: a metal structure, replaceable panels, a wooden top, polymer guards. The best architecture is not necessarily "all aluminium" or "all wood".
Choice sheet
Part concerned: top, frame, drawer, leg or handle.
Function: what the part must ensure.
Options compared: exact references.
Verified data: suppliers, measurements and tests.
Option chosen for prototype: a provisional decision.
Condition for final validation: test or opinion required.