Precision Portfolio
High-Performance Architectural Fenestration Systems
Engineered by Guangdong Dejiyoupin (DERCHI), balancing ultra-slim heritage aesthetic sightlines with structural marine-grade durability and certified thermal acoustic isolation.
Manufacturer Authority
Enterprise Capacity & Precision Engineering Infrastructure
Operating from Shishan Town, Nanhai District, Foshan, Guangdong Dejiyoupin Doors and Windows Co., Ltd. (DERCHI) operates China’s benchmark intelligent fabrication facility.
180,000 m²
Dedicated Production Base in Foshan
1,000,000 m²+
Annual Fabricated Fenestration Capacity
100+
Independent Structural & Acoustic Patents
18,000+
Global Landmark Projects Completed
Engineering Whitepaper
Aluminium Crittall System Architecture: Engineering Beyond Steel
Traditional hot-rolled steel internal doors carry excessive deadweight, rust liability in sub-tropical maritime climates, and cumbersome site glazing. DERCHI’s architectural 6063-T6 extruded aluminium Crittall system redefines interior glazing performance.
Ultra-Slim Heritage Sightlines
Fabricated using high-tensile 6063-T6 virgin aluminium billet profiles, our internal Crittall range offers narrow 32mm stiles and 20mm horizontal glazing transoms (astragal bars). This preserves the sought-after 1920s Bauhaus steel aesthetic while drastically eliminating frame deflection.
- Stile Depth38mm / 45mm
- True/Applied Glazing Bars18mm - 25mm Astragal
- Alloy Composition6063-T6 Structural Grade
Acoustic Attenuation (Rw 34–42 dB)
Interior visual connectivity should never sacrifice acoustic privacy in study zones, luxury master suites, or wine rooms. DERCHI integrates concealed EPDM co-extruded perimeter drop seals and precision perimeter magnetic seals, paired with PVB acoustic acoustic laminated glass.
- Glazing Pocket6.38mm to 24mm IGU
- Gasketing ProtocolContinuous EPDM Dry Glazed
- Perimeter Drop SealConcealed Automatic Plunger
Surface Finishing & Salt Protection
Internal fenestration within high-end coastal properties remains vulnerable to atmospheric marine salt micro-particulates entering via cross-ventilation. We utilize certified Qualicoat Class 2 architectural powder coats and AkzoNobel Interpon fluorocarbon finishes resisting blistering and micro-pitting.
- Powder Coat Thickness60–80 Microns Min
- Salt Fog Exposure Testing1,500 hrs ASTM B117
- Finish AestheticFine Texture Matt Black / Custom
Regional Integration
North Shore Architectural Application Scenarios & Living Trends
Across North Shore prestige properties—from the heritage Federation estates of Wahroonga, Killara, and Turramurra to the modern cantilevered cliffside marvels of Mosman and Northbridge—interior spatial demands are undergoing a structural transition.
Heritage Federation & California Bungalow Restorations
Preserving heritage brick walls while creating contemporary open-plan kitchen and pavilion extensions. Our Crittall internal double swing French doors establish clear demarcation between historic high-ceiling hallways and sleek glazed entertaining zones without visual volume obstruction.
WFH Professional Executive Sanctuaries
With North Shore executives commanding global operations from home, acoustic seclusion within private home libraries and offices is essential. Our Crittall acoustic glass partitions deliver Rw 38dB noise damping while allowing ambient daylight to permeate internal floor plates.
Climate-Controlled Wine Cellars & Tasting Rooms
Prestige properties demand bespoke internal display vitrines. DERCHI’s insulated, double-glazed Crittall screen assemblies feature thermally broken profiles that prevent outer condensation in humidity fluctuations while showcasing private cellar collections under museum-grade lighting.
Ensuite Master Suite Separation
Integrating fluted (reeded) or smoked glass panels into Crittall sliding pocket systems. This provides luminous visual privacy between luxury walk-in wardrobes and primary bathrooms without blocking natural dawn light typical in verdant hillside orientations.
Gym & Wellness Suite Enclosures
Contemporary residences incorporate custom home gymnasiums, sauna vestibules, and yoga spaces. Precision bottom-rolling or ceiling-hung sliding Crittall track systems resist humidity, clean effortlessly, and contain gymnasium equipment noise while maintaining architectural flow.
Kitchen & Scullery (Butler’s Pantry) Screening
Modern luxury culinary entertaining centers on social show kitchens backed by heavy-prep butler pantries. Slim-frame Crittall bi-parting pocket doors allow catering staff to seal off prep zones, masking noise and cooking odors during gala dinner engagements.
Specifier & Buyer FAQ
North Shore Procurement & Compliance Guide
Key technical answers addressing glazing compliance, engineering submittals, and sea container logistics for Sydney and regional Australasian specifiers.
How do DERCHI Crittall internal systems comply with Australian Standard AS 1288? +
Under National Construction Code (NCC) and AS 1288 (Glass in Buildings - Selection and Installation), all fully glazed internal door leaves and side panels within human-impact zones must use Grade A Safety Glazing. DERCHI glazes all North Shore Crittall assemblies with certified toughened safety glass (minimum 6mm to 10mm single or 5+12A+5 double toughened) carrying traceable laser etchings and laboratory compliance certificates.
Can these systems be specified for Bushfire Attack Level (BAL) zones? +
While internal partition doors are not directly subjected to external ember attacks, properties along North Shore bush interfaces (such as Ku-ring-gai and Lane Cove Valley) often incorporate Crittall screens inside double-glazed buffer sunrooms or enclosed verandas. For building envelopes requiring AS 3959 compliance (up to BAL-40), our engineering division matches external perimeter joinery with appropriate thick toughened glass and bronze bushfire mesh.
What are the lead times from Foshan factory gates to Port Botany delivery? +
Standard shop drawing engineering and BIM detailing take 5–7 working days. Once signed off, smart CNC cutting and assembly run for approximately 25–30 days. Ocean freight from South China (Nansha/Shekou) to Sydney (Port Botany) averages 14–18 transit days. Including local quarantine customs clearance, project delivery to site runs approximately 7–9 weeks from sign-off.
How are Crittall screens shipped to eliminate glass breakage risks? +
DERCHI uses export-grade international container packaging. Each aluminium frame is wrapped in electrostatic protective film, corner-guarded with high-density foam, and packed inside fully enclosed fumigated plywood crates with internal desiccants. Large format glass panels utilize dedicated internal steel A-frames to counter sea vessel roll during maritime transit.
Can DERCHI match bespoke heritage hardware and custom astragal bar grids? +
Yes. With over 30 in-house senior fenestration engineers, we create custom astragal bar layouts (true divided lites or structural bonded applied bars). We integrate German multipoint hardware, soft-closing hydraulic pivots, flush pull architectural latches, and our patented anti-tamper locking assemblies matching finishes such as aged brass, brushed bronze, and matt raven black.
What structural installation guidance is provided for North Shore building contractors? +
Every fabricated unit is pre-assembled and test-hung in our 180,000 m² factory before crating. Packages include comprehensive CAD/BIM shop drawings, step-by-step millimetre-accurate installation manuals, and direct technical video support between your licensed Australian builders/carpenters and our engineering staff.
Direct Exporter Route
Direct Factory-to-Site Oceania Shipping Infrastructure
DERCHI streamlines export logistics directly from our Foshan industrial complex to major oceanic deepwater ports. Every shipment is loaded in FCL (Full Container Load) or dedicated LCL crate configurations with maritime cargo insurance, export customs declarations, and AS 2047 / AS 1288 batch audit papers enclosed.
Inquire Now| Destination Port | Transit Time | Primary Regional Markets |
|---|---|---|
| Port Botany (Sydney, NSW) | 14–18 Days | North Shore, Northern Beaches, Eastern Suburbs |
| Port of Melbourne (VIC) | 16–20 Days | Toorak, Brighton, Mornington Peninsula |
| Port of Brisbane (QLD) | 13–17 Days | Brisbane Riverside, Gold Coast, Sunshine Coast |
| Fremantle (Perth, WA) | 13–17 Days | Cottesloe, Dalkeith, City Beach |
| Ports of Auckland (NZ) | 16–22 Days | Auckland Central, North Shore City, Remuera |
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Bring authentic Crittall elegance, certified acoustic isolation, and architectural precision to your next North Shore luxury build or commercial development.
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