Share your opening size, environment and traffic requirements — our engineers handle the technical specification. Here is how to prepare a complete brief that accelerates your DFM proposal.
Work through these five steps and you will have everything our engineers need to deliver an accurate DFM proposal within 48 hours.
Record the clear opening width x height in millimetres. Then note the headroom available above the opening (distance from lintel to ceiling), the side room for tracks or guides on each side, and the floor condition (flat, sloped, embedded rails).
Indoor or outdoor installation? Record the operating temperature range, relative humidity, and whether dust or cleanroom classification applies (ISO Class 5-8). For exterior doors, note the design wind load (or nearest city so we can look it up). Flag any corrosive chemicals, salt spray or washdown cycles present.
Estimate cycles per hour during peak operation. Identify the traffic mix: forklift, pedestrian, truck or a combination. State the required open/close speed (typical high speed doors run 1.5-2.5 m/s). Note whether this door must interlock with other doors, air curtains or production-line equipment.
Select the safety devices required: photo-eye beams, safety bottom edge, radar motion sensor, or inductive loop detector for vehicles. Define control integration needs: PLC/SCADA signals, remote control, pull-cord, fire-alarm linkage (auto-open or auto-close on alarm), or access-control keypad/card reader.
Choose a RAL color for panels and guides (any RAL available, no surcharge for standard colors). Decide on window panels, vision windows or full-vision sections. Note if logo printing or brand color matching is required. List any certification or code references: CE EN 13241, UL, AS/NZS, local fire code, or building-permit drawings your authority requires.
Not sure which door type fits your application? Use this matrix as a starting point – our engineers will validate or refine the choice during DFM review.
| Application | Recommended Door | Why | Typical Size Range |
|---|---|---|---|
| Logistics warehouse / loading bay | High Speed PVC Roll-up Door | 1.5-2.5 m/s speed, 200K+ cycle life, energy savings from reduced open time | W 2,000-6,000 x H 2,000-5,000 mm |
| Cold storage / freezer | Cold Storage High Speed Door | Heated frame, insulated curtain, -35 C rated, prevents ice build-up | W 1,500-4,000 x H 2,000-4,500 mm |
| Manufacturing / workshop | Sectional Door | Thermal insulation, wind resistance, window options, robust daily use | W 2,000-8,000 x H 2,000-6,000 mm |
| Retail / parking / security | Roller Shutter Door | Compact coil, high security, minimal headroom requirement | W 1,000-6,000 x H 1,500-5,000 mm |
| Cleanroom / pharma / electronics | Clean Room Door | Flush surface, airtight seal, interlock capable, ISO 5-8 compatible | W 800-3,000 x H 2,000-3,000 mm |
| Loading dock / external | Loading Dock Door + Leveler | Weather seal, impactable, full dock integration with shelter and leveler | W 2,500-4,000 x H 2,500-4,500 mm |
| Fire compartment / corridor | Fire Rated Roller Shutter | EI60/EI120 rated, auto-drop on alarm, failsafe gravity close | W 1,000-6,000 x H 1,500-5,000 mm |
Copy this list into your inquiry email. The more items you complete, the faster and more precise our first response will be.
Every inquiry enters our DFM (Design for Manufacturability) workflow. Here is the timeline from first email to container loading.
Our engineer reviews your specs, identifies conflicts and proposes the optimal door type plus configuration. You receive a 2-page PDF with recommendation, preliminary technical layout and budget estimate.
We finalize technical drawings together via video call. You approve dimensions, color, hardware and control logic. NDA signed if OEM. Final price confirmed on proforma invoice.
30% deposit received and production begins. You receive weekly photo and video updates. 100,000-cycle fatigue test at completion before packing.
Factory inspection report, CE docs and installation manual shipped with goods. FOB Tianjin/Qingdao. You receive tracking number and container loading photos.
Full document set with every order: English installation manual, wiring diagrams, CE Declaration of Conformity, fatigue test report. Learn more on our Shipping & Delivery page.
Your operating environment drives material selection, motor specification and seal design. Here is how we engineer for the four most demanding conditions.
Heated frame and guide rails prevent ice build-up. Insulated curtain retains thermal separation. Cold-rated motor oil ensures reliable operation. Condensation management channels protect electronics.
Stainless steel hardware resists corrosion. IP65-rated motor withstands direct spray. Food-grade PVC curtain meets hygiene standards. Integrated drainage channels route washdown water away from mechanics.
Flush panels with no exposed fasteners. Airtight perimeter seals maintain positive pressure. Interlock logic prevents cross-contamination. HEPA-compatible framing integrates with your HVAC system.
Wind-load rated tracks and reinforced slats withstand gusts to 120 km/h. Storm anchors secure the assembly to structure. Marine-grade coating (C5-M) resists salt spray corrosion for 15+ years.
Yes. Send a photo of the opening and describe what goes through it. We will recommend the right door type and size. Over 60% of our orders start from non-standard openings with minimal initial information – our DFM process is designed for exactly this situation.
Send photos and measurements. We reverse-engineer the spec and match color, size and mounting pattern. If you have the original manufacturer’s model number, even better – but it is not required. Our engineers work from physical dimensions and photos routinely.
That is our specialty. custom engineered to your specification, any size, any spec. Non-standard openings account for 60% of our orders. We custom-engineer every door to your exact dimensions – there is no “standard catalog” constraint. See our OEM/ODM page for details on custom engineering.
Yes – wind load, dead load and seismic data are available for engineer sign-off in your country. We provide the calculations in SI units with your local code references where applicable. Ask during DFM review and our engineers will include them in the documentation package.
Video factory tours are available anytime – we will walk the production floor live on WhatsApp or Zoom. In-person visits are welcome: our Cangzhou, Hebei production base is 2 hours from Beijing by high-speed rail. Contact us to arrange a visit.
5,000+ projects delivered across 50+ countries — from single-opening specifications to multi-site rollouts. One email is all it takes to get a free DFM proposal with technical layout and budget estimate.
