prefabricated steel doors

LG37S Hot-rolled steel series

Produced with hot-rolling technology, the 37 Series delivers a bold and solid profile with exceptional structural stability. Its clean, powerful lines make it ideal for expansive floor-to-ceiling windows, public architecture, and industrial-style projects, creating a strong visual presence and architectural impact.

LG50S Cold-bent steel series

Formed through advanced cold-bending techniques, the 50 Series is distinguished by its slim and refined profile, combining strength with lightness. It is best suited for interior partitions, fine window divisions, and minimalist modern spaces, offering both stability and a sense of elegance.

LG65S Thermal-break steel series

With integrated thermal-break technology, the 65 Series combines the inherent strength of steel with superior insulation and soundproofing performance. It is particularly suited for villas, luxury residences, and high-performance commercial spaces, ensuring both comfort and long-term durability.

steel-look thermal-break aluminum alloy

Built on lightweight aluminum alloy with thermal-break design, the 65 Steel-look Series replicates the authentic appearance of steel while offering aluminum’s advantages of corrosion resistance, insulation, and reduced weight. Perfect for modern homes, apartments, and design-focused spaces, it balances performance with distinctive aesthetics.

Shanghai

Shanghai

Beijing

Shanghai

Shanghai

Shanghai

London

London

Australia

Qingdao

London

America

Engineered for Modular Construction Efficiency
Prefabricated steel doors are integral to modern prefab structures, designed for seamless integration with steel-framed buildings, container houses, and temporary facilities. Unlike conventional doors, prefabricated steel doors utilize pre-assembled frames (internal/external split design) and galvanized steel sheets (0.6–1.5mm thickness) to enable bolt-on installation within minutes, eliminating on-site welding or adjustments. These steel sandwich panel doors support standardized openings (e.g., 840×2035mm) while offering reversible swing directions for flexible space planning. Rigorous quality control during factory production ensures compliance with ISO, CE, and Energy Star® certifications for global projects .

Technical Specifications & Certifications

• Material Composition:

• Door Leaf: 0.6–1.0mm galvanized steel with honeycomb paper/PU foam/rock wool cores for lightweight insulation (U-value ≤0.32) .

• Door Frame: 0.8–1.5mm galvanized steel with pre-drilled holes; depth adjustable for 70–150mm wall panels .

• Safety Features:

• Multipoint locking systems with stainless steel hinges (304 grade) .

• Optional panic devices, electromagnetic locks, and UL 752 ballistic ratings (Level 1–8) .

• Environmental Resistance:

• Electrostatic powder coating (50+ colors) and EPDM perimeter seals prevent water/dust ingress in coastal or industrial zones .

Core Advantages Over Traditional Doors

• Labor & Time Reduction: Prefabricated steel doors reduce installation time by 80% via pre-hung frames and modular hardware kits. Builders report 40% lower labor costs versus wooden doors .

• Lifecycle Economy: Powder-coated finishes eliminate repainting; stainless steel components require only biannual lubrication, saving 60% in maintenance over a decade .

• Thermal & Acoustic Performance: Rock wool cores achieve STC 40–50 ratings, reducing noise by 30–40 dB in hospitals or schools .

Industry Applications

• Emergency Housing: Rapid-deploy steel sandwich panel doors for disaster-relief shelters and medical clinics (ISO-compliant) .

• Industrial Facilities: 1.5mm-thick steel doors with impact-resistant cores for warehouses and factories exposed to heavy machinery .

• Commercial Buildings: Full-vision glazed prefabricated steel doors with fire ratings for offices and retail spaces .

Customization & Global Compliance

• Design Flexibility:

• Sizes from 820×2040mm to 1600×2035mm; custom dimensions support oversized hangar openings .

• Glazing options: tempered, laminated, or argon-filled glass for vision lites .

• Certifications:

• CE, ISO 9001, EN 1634-1 (EU fire standards), and GB 12955-2008 (China) .

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Installation & Maintenance Protocols

• Step-by-Step Installation:

• Align split frames within ±1.5mm tolerance; secure with provided bolts/adhesives .

• Verify seal compression to ensure weather tightness (EPDM gaskets) .

• Maintenance Guidelines:

• Quarterly hinge lubrication with silicone spray.

• Replace damaged EPDM seals annually to maintain insulation .