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Aluminum alloy framework for lightweight high-strength performance, stainless steel reinforcement at critical structural points — dual-material combination balancing outdoor weather resistance with structural security, more comprehensive and reliable than single-material solutions.
All metal components undergo multiple anti-corrosion processes (anodizing/electrophoresis/powder coating) — UV-resistant, acid rain-proof, salt spray-proof, no rusting or fading from long-term outdoor exposure.
Door body interior featuring professional fire-resistant thermal insulation materials — even as an outdoor courtyard gate, maintaining complete fire barrier capability, providing perimeter fire protection for courtyard buildings.
Stainless steel reinforcement at critical stress points + professional outdoor security locks + thickened door structure — courtyard gate security as the first line of defense cannot be compromised.
Surface treatment specifically optimized for outdoor environments — weather resistance far exceeding indoor door standards, colour maintaining 5+ years without noticeable change through sun and rain exposure.
Outdoor-environment-specific manual opening system — no electrical power required, unaffected by power outages or wiring faults, reliable all-weather operation.
| Parameter | Details |
| Brand | DERCHI |
| Model Number | ZK-HL-FDM-1108001 |
| Material | Aluminum + Stainless Steel |
| Special Door Type | Exterior Gate Door / Security Door |
| Design Style | Modern |
| Position | Commercial / Garden |
| Opening Method | Manual |
| Fire Rating | 1.5hr |
| Feature | Anti-Theft |
| Surface Finishing | Finished |
| Warranty | 5 Years |
| Place of Origin | Guangdong, China |
| Project Solution Capability | Total Solution for Projects |
| After-Sale Service | Online Technical Support |
Courtyard entrance site survey + environment assessment → Door design scheme confirmation → Factory custom production (20-30 days) → Professional packaging & shipping → On-site installation (including foundation embedded parts + door body fixing + lock calibration) → Acceptance delivery.
Overall 5-year warranty; Door structure 5-year warranty; Surface treatment 5-year warranty; Lock system 3-year warranty; Hardware accessories 3-year warranty.
Online technical support with responsive availability for all technical and maintenance inquiries.
Rinse door face quarterly with clean water to remove dust and stains; lubricate hinges/pivots every 6 months; inspect and lubricate locks annually; check door base drainage after rainy season; coastal areas recommend monthly freshwater rinse to remove salt deposits.
