Use these polycarbonate guides to narrow a sheet specification before asking for a price. Start with the decision your project needs: sheet construction, thickness and support, light performance, fabrication or material comparison. Then send the grade, dimensions, use and acceptance criteria to SinoPlastix for an order-specific quotation.
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Choose a guide by the question you need to answer
Which sheet construction?
Compare solid and multiwall PC, then review solid sheet or multiwall sheet for the quotation.
What thickness and support?
Start with the thickness guide. For roofing, add the load and span guide and the actual support drawing.
What happens in a roof assembly?
Use the U-value guide for heat-flow questions and the thermal-movement calculator for a first fixing-gap estimate. Confirm the installed system separately.
Which optical or fire route?
For LED fixtures, use the diffuser trial worksheet. For fire requirements, compare standard and flame-retardant PC and identify the named test for the quoted grade.
PC or another material?
Frame the requirements in the material-selection worksheet, then compare PC with acrylic, glass, PETG or polypropylene under matching conditions.
How will the part be made?
Read the cutting guide or bonding guide, then send a drawing to PC fabrication for a process and tolerance review.
What to bring from a guide into your RFQ
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| Buyer decision | Input that changes the answer | What to request with the quote |
|---|---|---|
| Roof or glazing panel | Clear span, support layout, design loads, UV exposure, panel construction and fixing method | Offered grade/construction, drawing and applicable load or material data. Local design approval still applies. |
| Machine guard or impact screen | Hazard, impact energy, opening size, frame and fasteners | Grade data and assembly-specific engineering or testing for the required standard. |
| LED diffuser | LED pitch, cavity depth, required transmission, visual uniformity and surface finish | Offered sample in the actual fixture and an agreed optical measurement method. |
| Custom cut or fabricated part | Drawing revision, thickness, cutouts, edge finish, tolerance and quantity | Process route, first-part or sample approval, inspection points and packing requirements. |
Example: “10 mm multiwall PC for a canopy” is not enough to select a panel. Add the support spacing, roof pitch, weather/load basis, panel length and width, UV-facing side, joining and drainage details. The roofing guide helps organize those inputs; the quoted sheet and full roof assembly still need the required local review.
Documents and ordering
Original reports for commonly requested PC tests are held by SinoPlastix and can be requested from sales. State the offered grade, thickness, named standard and acceptance result so the original can be matched to the proposed product. See how to review a PC report; if you need batch or inspection documents with shipment, include them in the RFQ.
All custom PC specifications can be quoted. Complexity, quantity, fabrication and delivery terms affect price and schedule; published figures are average planning references and the written quotation controls the order. See MOQ, lead time and shipping inputs.
Questions buyers ask
Can a generic PC thickness chart approve a roof or guard?
No. Use a guide to identify the candidate thickness and missing inputs, then check the offered grade, panel size, supports, loads, fasteners and applicable assembly requirement. A sheet property alone does not approve the installed system.
How should I compare PC with acrylic, glass or PETG?
Keep thickness, construction, test method and service conditions comparable. Use the material-selection worksheet and the relevant comparison guide, then request grade-specific data and samples for the actual use.
Can I request an original PC test report?
Yes. Tell sales the quoted grade and thickness, the required standard and the result needed for approval. Applicable originals are provided privately on request; verify the specimen and scope before using a report for the order.