A specifier asked for polycarbonate sheet 10mm and the supplier happily supplied it, without checking what the 10mm actually had to do. Ten millimetres is a mid-range thickness: more impact than 8mm, lighter and cheaper than 12mm, and right only for certain spans and loads.
When 10mm is the right call
Polycarbonate sheet 10mm carries a real impact and load range, but that range depends on how it is supported. As a machine guard or glazing panel with a short span, 10mm absorbs strong impacts that shatter glass. As a roofing panel spanning a longer distance, the same 10mm may sag unless the supports are closer. The decision is span and load, not just the number. That is why 8mm suits light duty and 12mm suits high impact and wider spans.
What to verify with 10mm
- Supported span and the load it must carry.
- Thickness tolerance and consistency across the sheet.
- UV-stabilised surface if the panel is outdoors.
- Impact class needed for the guard or glazing application.
How the thickness is chosen for the application is covered in the what thickness polycarbonate sheet do I need guide, and the tolerance detail in acrylic and PC sheet thickness tolerance.
Frequently Asked Questions
Q: When is polycarbonate sheet 10mm the right thickness?
A:10mm is right for a mid-range of impact and load with a short to medium supported span. For light duty, 8mm is enough; for high impact or longer spans, 12mm is safer.
Q: Does a 10mm polycarbonate sheet need a UV layer outdoors?
A:Yes, if it is exposed to sunlight. A UV-stabilised surface prevents yellowing and embrittlement that would otherwise shorten the sheet’s life outdoors.
For a cast acrylic or polycarbonate sheet quoted to your thickness, size and quantity, email oversales@rpplexiglass.com with the material, thickness, dimensions, quantity and destination port.