Precision-engineered residential villa swing doors, commercial entrance gates, and bulletproof armored assemblies manufactured directly from our 180,000 m² Foshan production campus.
High-density commercial hubs, luxury high-rises, government facilities, and critical infrastructure demand doors capable of resisting physical intrusion, ballistic impacts, and localized fire threats while maintaining seamless electromechanical integration.
Modern luxury villas require grand entrances—often exceeding 2.5 meters in width and 4 meters in height. These grand pivot and double-leaf systems must balance massive weight with effortless, silent operation and elegant aesthetic finishes.
Global developments must strictly align with international standards, such as EN 1627 RC3–RC6 forced entry resistance, UL 10C positive pressure fire tests, and AS2047 cyclone performance ratings, demanding verifiable factory test data.
At DERCHI, engineering a high-security entrance requires meticulous attention to structural dynamics, thermal breaks, and anti-pry mechanical locks.
Utilizing 1.5mm to 2.0mm high-tensile electro-galvanized cold-rolled steel sheets or solid SUS304/316 stainless steel. The internal chamber is packed with high-density rockwool (120kg/m³) or ceramic fiber boards to achieve up to 120 minutes of fire resistance and exceptional sound attenuation (STC 42 dB+).
Equipped with 12-to-18 point active steel deadbolts, anti-drill manganese steel lock casing protectors, and inter-locking continuous rebate edges that render crowbar insertion impossible under EN 1627 Class RC4 testing protocols.
Standard butt hinges fail under 300kg+ door leaves over time. Our custom engineered 3D-adjustable stainless steel floor pivots and German-imported needle bearing hinges effortlessly support loads up to 800kg for over 500,000 opening cycles.
| Security Platform Grade | Skin & Core Material Specs | Forced Entry / Fire Rating | Thermal & Acoustic Index | Recommended Applications |
|---|---|---|---|---|
| Standard Residential Villa Security | 1.5mm Electro-Galvanized Steel + Honeycomb & PU Foam | EN 1627 RC2 / RC3 | 30 Min Fire | U-Value: 1.8 W/m²K | 32 dB | Residential Main Entrances, Luxury Gated Communities |
| Armored Commercial Entrance | 2.0mm SUS304 Stainless Steel + High-Density Rockwool | EN 1627 RC4 | UL 10C 90 Min Fire | U-Value: 1.4 W/m²K | 38 dB | Financial Institutions, Hotel Lobbies, Commercial Headquarters |
| Heavy Ballistic & Explosion Proof | 3.0mm Hardened Alloy Steel + Ceramic Armor Plates | UL 752 Level 3–8 Bulletproof / RC5-RC6 | U-Value: 1.2 W/m²K | 45 dB | Diplomatic Facilities, Safe Rooms, Executive Compounds |
| Cast Aluminum & Steel Hybrid | 8-12mm Cast Aluminum Panel + Steel Sub-Frame Structure | EN 1627 RC3–RC4 | Impact Tested | U-Value: 1.6 W/m²K | 36 dB | Grand Villa Gates, Coastal Estate Entrances |
A custom steel security door must endure localized severe weather, extreme temperature shifts, and unique regional building codes without structural degradation.
Primary Focus: UL 10C Fire Compliance, NFRC Thermal Certification, High Velocity Hurricane Zone (HVHZ) Impact Testing.
Technical Solution: Intumescent smoke seals, thermally broken sub-frames with polyamide insulation breaks, Florida-approved multi-point latching systems capable of withstanding DP70 wind pressures.
Primary Focus: PAS 24 / EN 1627 Security Standard, Ultra-low U-Values (< 1.0 W/m²K for Passive House designs).
Technical Solution: Triple-gasket EPDM perimeter seals, vacuum insulation panels (VIP) integrated inside the door core, and concealed 3D hinges compatible with Smart Home BACnet protocols.
Primary Focus: Extreme Solar Heat Cycling (+50°C), Sandstorm Gasket Integrity, UV-Resistant Coatings.
Technical Solution: Automotive-grade PVDF fluorocarbon coatings resisting 2,000+ hours of accelerated UV testing, dual-brush sand seals, and structural expansion joints preventing leaf warping.
Primary Focus: AS2047 Cyclone Wind Load, High Humidity Anti-Corrosion (C5-M Coastal Rating).
Technical Solution: SUS316 marine-grade stainless steel hardware, electrophoretic pre-treatment of all raw steel components, and multi-stage salt spray testing surpassing 1,500 hours.
Sourcing directly from Foshan, Guangdong—the world’s premiere architectural door and window industrial hub—grants international buyers unmatched cost efficiency, precision CNC craftsmanship, and rapid lead times.
Unlike European assemblers who outsource profile extrusions, panel stamping, and surface finishing to third-party vendors, DERCHI controls every step in-house: from raw metal extrusion and 5-axis CNC machining to robotic welding and automated powder coating.
Every custom steel security door undergoes 100% pre-assembly inspection before leaving our plant. We perform dynamic wind pressure checks, water tight seal testing, latching torque calibration, and surface paint thickness verification on every single order.
Our automated production lines deliver custom sample doors within 12 to 18 days, while complete container project shipments average 25 to 35 days—slashing project delivery timelines by up to 40% compared to Western manufacturers.
How DERCHI is pioneering the next decade of intelligent entrance security, eco-sustainable metallurgy, and structural composite engineering.
Seamlessly embedding structural facial-recognition sensors, palm-vein scanners, and encrypted mobile access modules directly inside thermal steel frame profiles with motorized silent multi-point latches.
Integrating graphene-enhanced honeycomb matrices and lightweight Kevlar layers inside steel skins, reducing leaf deadweight by 35% while upgrading bullet resistance to UL Level 8 standards.
Transitioning production facilities to 100% solar-powered powder curing ovens, adopting zero-VOC bio-based surface coatings, and using 90% recycled high-tensile steel to meet global carbon-neutral building targets.
Partnering with DERCHI guarantees end-to-end operational support—from CAD/BIM drawing approval to heavy-duty ocean freight protection.
Our dedicated structural engineering team produces customized 2D CAD section details and 3D BIM Revit families within 48 hours of initial inquiry, ensuring flawless alignment with architect schedules.
Doors are encased in protective PE film, corner-guarded with EPE shock-absorbing foam, sealed in 5-layer corrugated cartons, and secured inside fumigation-free solid plywood crates. Ocean transit damage rates remain below 0.3% globally.
Every shipment includes opening-numbered installation guides, anchor torque specifications, and hardware callout sheets. Dedicated technical assistance is provided via live video calls during installation of the initial openings.
In-depth answers to common questions from project architects, general contractors, and procurement managers.
Our custom steel security door systems are manufactured under ISO 9001 certified quality management. Products are independently tested to meet European EN 1627 RC2–RC4 forced entry standards, UL 10C positive pressure fire tests (30/60/90/120 minute ratings), Australian AS2047 N6 wind and water infiltration standards, and CE marking protocols for international export projects.
For standard door frames, leaf widths reach up to 1,600 mm and heights up to 3,200 mm. For custom grand entrance gates and oversized luxury villa pivots, our engineering team manufactures single door leaves up to 2,200 mm wide and 4,500 mm high. These utilize internal structural steel-core frames, heavy-duty floor pivots rated to 800 kg, and anti-deflection tensioning rods to maintain long-term alignment.
Exterior steel security doors incorporate high-density polyamide (PA66) thermal break strips between the exterior and interior steel sub-frames. The interior chamber is fully injected with polyurethane foam or dense rockwool, eliminating metal-to-metal thermal paths and preventing condensation even in sub-zero ambient climates.
We accommodate both project sample orders and large commercial volume schedules. The MOQ for custom doors is 1 set (ideal for villa samples or mock-up verification). Sample production takes 12 to 18 days, while full container shipments take 25 to 35 days following CAD shop drawing approval and deposit receipt.
Yes. Our 5-axis CNC machining stations cut precise lock pockets, wiring conduits, and hinge prep paths for any major hardware brand worldwide (such as Dormakaba, ASSA ABLOY, GU, or HOPPE). We also supply pre-wired electro-magnetic lock integration for seamless installation on-site.
Explore our range of bulletproof cast aluminum entrances, hurricane-resistant sliding doors, and stainless steel security assemblies designed for demanding project specifications.
