Double Glazed / Grill
Aluminum Profile Double Glass Sliding Doors with Flyscreen
Alloy Profile:6063-T6 (2.0mm)
Infill:5+12A+5 Tempered
Screen:304 SS Marine Mesh
Technical Dossier & Executive Summary
High-Integrity Architectural Aluminium Grill Fenestration Systems
In contemporary commercial and luxury residential construction, entrance systems are no longer merely passive physical barriers. Modern European building directives, specifically the Construction Products Regulation (EU) No 305/2011 and harmonised standard EN 14351-1, mandate precise structural verification across air permeability, thermal breaks, burglary prevention (EN 1627 RC classes), and wind-load resistance. As a premier Chinese manufacturer operating a 180,000 m² smart production base, DERCHI engineers bespoke aluminium grill doors and precision facades designed to surpass rigorous international statutory benchmarks while optimizing total lifecycle procurement costs.
180k
m² Production Footprint
25+
Years Engineering Expertise
RC3/RC4
Burglary Resistance Rating
100%
CE & ISO 9001 Certified
Engineered Product Portfolio
Specified Aluminium Grill Doors & High-Performance Systems
Explore our precision-fabricated systems featuring extruded architectural 6063-T6/6061-T6 profiles, laser-welded structural security grills, PA66-GF25 thermal barrier inserts, and multi-point perimeter security mechanisms.
High Windload Class
Outdoor Windproof Automatic Aluminum Rolling Grill Shutter Door
Operation:Automated Tubular Motor
Wind Rating:EN 12210 Class 5
Finish:Qualicoat Powder / PVDF
Electric Sectional
Modern Aluminum Grille Sectional Electric Garage Door
Mechanism:Torsion Spring Lifting
Slat Design:Perforated Security Grill
Safety:Infrared Anti-Pinch
Heavy-Duty Pivot
Luxury Aluminum Double Glass Pivot Front Entry Grill Door
Bearing Load:Max 800 kg Pivot Hinge
Locking:5-Point German Cylinder
Thermal Break:PA66 Insulated Chamber
Multi-Fold Panoramic
Lukliving Architectural White Grill Aluminium Bi-Fold Doors
Track Style:Concealed Flush Threshold
Grill Pattern:Custom Geometric CNC
Cycle Test:100,000 Open/Close
Custom Roller Grill
OEM Custom Aluminium Alloy Roller Shutter Security Grill Door
Extrusion:Interlocking Slats
Security Class:RC2 / RC3 European Norm
Application:Commercial & Residential
Industrial High-Speed
High-Speed Automatic Aluminum Industrial Grill Hard Panel Door
Speed:Up to 1.5 m/s Inverter
Hardness:Webster Hardness ≥14 HW
Acoustic:Rw 28 dB Sound Shield
Thermal Break System
Thermal Break Aluminum Crank Casement with Built-In Grill
Thermal Break:PA66 Polyurethane Bridge
Hardware:American Truth Operator
U-Value:1.4 W/(m²·K) EN ISO 10077
Engineering White Paper
Metallurgical Formulations, Mechanical Integrity & European Standards
A rigorous examination of aluminium alloys, extrusion tolerances, thermal resistance mechanics, and CE compliance mandates under EN 14351-1.
1. Architectural Alloy Specification: 6063-T6 vs. 6061-T6 Mechanical Dynamics
In high-performance fenestration systems, raw billet selection directly governs elastic modulus, structural deflection, and corrosion thresholds. DERCHI primarily utilizes prime 6063-T6 and 6061-T6 aluminium alloys extruded strictly according to EN 755-2 and EN 12020-2 tolerances. The chemical composition is precisely titrated: Silicon (0.2–0.6%) and Magnesium (0.45–0.9%) form Magnesium Silicide (Mg₂Si) precipitates during solution heat treatment and artificial aging, achieving a tensile strength exceeding 215 MPa and a yield strength surpassing 170 MPa (Webster Hardness ≥ 12–14 HW).
For large-span commercial security grill systems subjected to extreme dynamic wind loads (EN 12211), custom internal reinforcing ribs (I-beam architecture) are extruded directly within the profile cavities. This design maximizes the area moment of inertia (Ix and Iy), eliminating structural deflection under dynamic pressure loadings exceeding 3000 Pa (Class C5).
| Performance Characteristic | Harmonised EU Standard | Standard Market Offering | DERCHI Engineered System |
|---|---|---|---|
| Burglary Resistance | EN 1627 to EN 1630 | Class RC1N / RC2 (Basic entry barrier) | Class RC3 to RC4 with multi-point interlocking steel bolts & anti-drill manganese plates |
| Thermal Transmittance (Ud) | EN ISO 10077-1 & -2 | 2.2 – 2.8 W/(m²·K) (Non-broken / standard) | 0.9 – 1.3 W/(m²·K) using 34mm PA66-GF25 thermal struts & warm-edge argon chambers |
| Air Permeability | EN 12207 | Class 2 (300 Pa baseline leakage) | Class 4 (600 Pa) continuous EPDM vulcanized central gasket barrier |
| Watertightness | EN 12208 | Class 5A (200 Pa) | Class 9A / E1050 (1050 Pa) pressure-equalized cascade drainage system |
| Resistance to Wind Load | EN 12210 | Class B2 / C2 | Class C5 tested up to 3000 Pa dynamic gusting pressure |
| Acoustic Insulation (Rw) | EN ISO 717-1 | 28 – 31 dB | 38 – 44 dB utilizing asymmetric laminated acoustic glazing infills |
2. Thermal Break Mechanics & Isothermal Profile Optimization
A primary failure mode of conventional metal grill doors in cooler European climates (Germany, UK, Scandinavia) is interstitial condensation and cold-bridging across the metal door leaf. DERCHI overcomes this thermodynamic obstacle through precision-fitted PA66-GF25 polyamide thermal barriers reinforced with 25% transverse glass fiber matrix. The thermal expansion coefficient of PA66-GF25 (2.3 × 10⁻⁵ 1/K) matches aluminium exactly, preventing delamination or shearing under drastic seasonal temperature fluctuations ranging from -35°C to +80°C.
By decoupling the external security grill chassis from the interior architectural frame, our isothermal lines remain perfectly linear. When configured with triple-glazed warm-edge units filled with 90% Argon gas, our systems reliably deliver an overall thermal transmittance value of Ud ≤ 1.1 W/(m²·K), fully satisfying Germany's Gebäudeenergiegesetz (GEG) and UK Building Regulations Part L requirements.
Market Foresight & Analytics
Future B2B Procurement Trends in Architectural Aluminium (2025–2030)
Strategic purchasing managers and commercial specifiers must navigate evolving carbon compliance regimes, automation, and supply chain digitalization.
1. CBAM & Low-Carbon Billet Sourcing
With the European Union's Carbon Border Adjustment Mechanism (CBAM) fully transitioning into punitive tax phases, tier-1 procurement demands third-party verified Environmental Product Declarations (EPD). DERCHI integrates low-carbon primary ingots smelted using hydropower, reducing the embodied carbon footprint down to < 4.0 kg CO₂e/kg Al.
2. Mechatronic & BMS Interoperability
Modern grill doors are transitioning from standalone hardware to integrated Internet-of-Things (IoT) entrance nodes. We supply commercial rolling grills and pivot entry arrays fitted with brushless DC drives, dry-contact relay integration for Building Management Systems (BMS), KNX/BACnet protocols, and encrypted biometric authentication (3D facial recognition, optical fingerprint).
3. Digital Prefabrication & BIM Workflows
General contractors increasingly mandate Building Information Modeling (BIM) Level 2 integration. DERCHI provides native Revit (.RFA) and IFC files with embedded thermal, acoustic, and clearance geometries (LOD 300 to LOD 400). Offsite pre-assembled delivery reduces on-site construction schedules by up to 35%.
4. Direct Factory-to-Site Consolidation
Middlemen distribution markups are diminishing as developers build direct technical alliances with primary extrusion factories. DERCHI provides end-to-end containerized export packing with steel transport cradles, batch traceability, and full custom clearing documentation direct to European regional logistical hubs.
Technological Differentiation
Next-Generation Architectural & Manufacturing Technologies
How precision engineering, surface fluorocarbon passivation, and micro-ventilation security redefine architectural doors.
5-Axis CNC Precision Milling
Rather than primitive, aesthetically unappealing manually welded tubular bars, our security grills are sculpted via high-speed 5-axis CNC machining centers from solid billet structural plates. This delivers unbroken structural rigidity, micrometer-level corner alignment, and sleek contemporary geometries aligned with minimal luxury villa façades.
Micro-Ventilation with Marine 316 Mesh
Bridging passive natural cooling and hardened home defense. Our proprietary composite grill profiles embed woven high-tensile 0.8mm AISI 316 marine-grade stainless steel mesh behind the aluminium decorative architecture. This configuration withstands knife shearing tests (AS 5041) and provides mosquito/fly screen functionality without obstructing panoramic lines of sight.
Qualicoat Seaside & Anodizing Passivation
For high-salinity coastal European projects (Mediterranean, North Sea, Atlantic seaboards), surface preservation is paramount. DERCHI finishes profiles utilizing multi-stage chromium-free passivation, followed by either AkzoNobel Interpon D2525 architectural powder coatings (Qualicoat Class 2 certified) or 25-micron hard electrolytic anodizing (ISO 7599), offering 3,000+ hours of continuous neutral salt-spray (NSS) test resistance.
Enterprise Scale: Foshan Manufacturing Authority
Guangdong Dejiyoupin Doors and Windows Co., Ltd. (DERCHI) stands in the top tier of international architectural fenestration manufacturers. For over 25 years, our integrated production ecosystem has serviced high-stakes residential and commercial installations across the UK, Germany, France, the Netherlands, North America, and the Middle East.
180,000 m² Industrial Base
600+ skilled technicians, automated CNC extrusion lines, robotic powder coating facilities, and in-house glass tempering ovens in Foshan, China.
Schüco-Level German Tolerances
Selected by a prominent UK Schüco partner for multiple multi-villa projects. Strict manufacturing tolerances within ±0.5 mm on all perimeter frames.
CET/GMT-Aligned Project Support
Our dedicated bilingual sales engineering teams interface directly with European architects and project managers during standard European working hours.
Technical FAQ
Frequently Asked Questions by Global Specifiers & Procurement Officers
Direct, rigorous answers addressing certification, logistics, structural tolerances, and custom project execution.
How does DERCHI substantiate compliance with the EU Construction Products Regulation (CPR) and CE Marking?
All DERCHI external door and window assemblies are certified pursuant to harmonised European standard EN 14351-1 under System 3 (and System 1 where emergency exit functions apply). We issue project-specific Declarations of Performance (DoP) accompanied by Type Test Reports (ITT) accredited by recognized European notified bodies. These documents formally certify thermal transmittance (EN ISO 10077), wind-load resistance (EN 12210), air tightness (EN 12207), and water tightness (EN 12208).
What anti-burglary testing protocols do your aluminium security grill doors adhere to?
Our high-security series are engineered and tested in accordance with EN 1627, EN 1628 (static loading up to 6 kN), EN 1629 (dynamic impact testing via a 50 kg dual-tire pendulum), and EN 1630 (manual burglary simulation). By incorporating internal steel structural tie-rods, heavy-duty 3D adjustable security hinges, manganese anti-drill lock housings, and multi-point perimeter hook-bolts, we achieve verified Resistance Class 2 (RC2), RC3, and bespoke RC4 ratings.
Can DERCHI fabricate oversized custom pivot and sliding grill systems based on architectural CAD/BIM schedules?
Yes, 100% custom dimensional engineering is our primary institutional strength. We regularly engineer oversized single-leaf pivot doors exceeding 4,000 mm in height and 2,000 mm in width, with leaf weights exceeding 600 kg. Our in-house engineering office translates your architectural schematics into full shop fabrication drawings (AutoCAD DWG, Revit RFA), including comprehensive load-bearing floor pivot calculations, structural lintel deflections, and perimeter flashing integration details.
How does the factory prevent galvanic corrosion between aluminium frames and stainless steel grill components?
Dissimilar metals with differing electrochemical potentials (such as aluminium and 304/316 stainless steel) can generate galvanic corrosion when moisture acts as an electrolyte. DERCHI strictly enforces galvanic isolation protocols: all stainless steel fastening hardware, security pins, and grill brackets are isolated using engineered EPDM, nylon, or PTFE non-conductive sleeves and dielectric insulating washers. Fasteners are exclusively A4-70 (AISI 316) marine-grade stainless steel.
What packaging and containerization protocols are implemented to prevent damage during sea transit to European ports?
All doors undergo a 5-layer export packaging regimen: (1) peelable PE protective masking film over all painted/anodized surfaces, (2) multi-layer corner protectors, (3) heavy-duty EPE pearl foam wrapping, (4) vacuum heat-shrink wrapping to prevent maritime moisture ingress, and (5) fully fumigated IPPC-certified solid plywood crates or heavy-duty welded A-frame steel shipping racks. Shipments arrive intact at major ports such as Rotterdam, Hamburg, Antwerp, and Felixstowe.
What is the standard production lead time and sample verification process for commercial projects?
Following technical drawing sign-off and color match approval, custom production cycles typically require 25 to 35 calendar days. For multi-unit commercial developments or villa subdivisions, we produce a 1:1 scale visual and functional prototype (golden sample) for client or third-party laboratory inspection before initiating mass batch production.
Ready to Engineer Your Project's Entrance Solutions?
Submit your door schedules, CAD sections, or structural specifications. Our English-speaking senior façade engineers will review your requirements and provide comprehensive CAD shop drawings, U-value thermal calculations, and competitive factory-direct B2B quotation within 24 business hours.
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