How big a terrazzo furniture top can one panel make?

Whatever it spans, and the span is a structural question about the panel and its support rather than about terrazzo. What the standards give you is a maximum panel size — up to 3200 by 1800 millimetres with thicknesses to 60 — and a flatness tolerance on the finished element. What they do not give is a span table, and we do not publish one.

Reference photograph of a terrazzo surface, s12. Not a photograph of our goods. — Round table on a tapered pedestal, fine pale terrazzo

Reference photographs. They show the material and the finish; they are not photographs of goods we made, and the colour on screen is not a colour-match.

The figures, and where each one comes from

What is available	Figure	Source
Largest enumerated length	3200 mm	JC/T 507-2022 table 1
Largest enumerated width	1800 mm	JC/T 507-2022 table 1
Enumerated thicknesses	15, 20, 25, 30, 40, 50, 60 mm	JC/T 507-2022 table 1
Thickness tolerance	plus or minus 1.0 mm	JC/T 507-2022 table 4
Flatness, ordinary	up to 0.8 mm to 1200 mm, up to 1.0 mm beyond	JC/T 507-2022 table 4
Flatness, high-performance	up to 0.7 mm beyond 1200 mm	JC/T 507-2022 table 4
⛔ Span table	⛔ none published by any standard we can cite

Why the processes are not interchangeable

The size list is worth quoting because it removes a common misunderstanding: a 3200 by 1600 by 20 panel is a compliant product under the standard, with its own marking example in that standard, and not a special order. What the standard does not do is tell you how far that panel can span — that is a structural question about the panel, its thickness, its support and the load on it, and the honest position here is that a standards document does not answer it. Anyone quoting a maximum span for a terrazzo panel is quoting their own engineering or their supplier, and the question is worth asking of them.

What these figures are, and what they are not

Every figure on this page is from JC/T 507-2022, tables 1 and 4. ⛔ NO SPAN, NO LOAD AND NO DEFLECTION FIGURE APPEARS, because none was traceable to a standard and we publish none of our own. ⛔ Ask us for the panel drawing and the fixing detail for the size you have in mind and we will tell you what we hold.

Measured data sheets and test reports

If you are specifying this

These are the forms we actually supply for this question, with production photographs where we have them:

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