Zhejiang Larsom Door Co., Ltd. stands as a premier enterprise in China's advanced architectural hardware and structural security door manufacturing industry. We specialize in the research, development, engineering design, high-precision production, and international dispatch of commercial-grade stainless steel doors, armored security entrance systems, fire-rated steel doors, and bespoke architectural metal doors.
Driven by the core enterprise philosophy of "Quality First, Customer Foremost, Innovation for the Future," Larsom Door has consistently elevated structural safety standards, acoustic attenuation specs, and anti-corrosive longevity across all product lines. Our factory operates under stringent quality control paradigms, bridging raw metal metallurgy with sophisticated CAD/BIM architectural integration.
Through dedicated OEM and ODM capabilities, we partner with world-class real estate consortiums, general contractors, commercial developers, and government infrastructure agencies to deliver tailored door systems that exceed local building safety codes and structural load demands.
Our stainless steel door profiles utilize premium AISI 304 and marine-grade AISI 316 austenitic stainless steels. Engineered with high nickel and chromium ratios, these materials guarantee immunity to pitting corrosion, oxidation, and severe environmental breakdown in coastal or industrial chemical atmospheres.
To eliminate high thermal conductivity inherent in metals, Larsom integrates high-density polyamide (PA66 GF25) thermal break strips within the door leaf and frame profiles. This decouples outer and inner metal skins, dramatically lowering overall U-values and preventing interior condensation.
Utilizing multi-bend structural reinforcement channels, manganese anti-drill lock protection plates, and multi-point mortise locking gear, our heavy-duty armored doors meet physical security standards equivalent to European EN 1627 RC3/RC4 and UL 752 ballistic levels.
Technical Note for Procurement Engineers: Stainless steel door assemblies produced by Zhejiang Larsom Door Co., Ltd. can be customized with internal acoustic core cores (rockwool, aluminum honeycomb, or polyurethane foam) achieving Sound Transmission Class (STC) ratings up to 45 dB.
| Parameter / Specification | Commercial Grade (AISI 304) | Marine / Industrial Grade (AISI 316) | Armored Hybrid Series |
|---|---|---|---|
| Tensile Strength (MPa) | ≥ 515 MPa | ≥ 620 MPa | ≥ 780 MPa (Reinforced) |
| Corrosion Resistance | Excellent (Standard Urban) | Superior (Salt Mist / Chemical) | High-Durability Coated |
| Fire Rating Performance | FD30 / FD60 (EN 1634-1) | FD90 / FD120 (UL 10C) | FD120 Intumescent Sealed |
| Acoustic Insulation (STC) | 32 - 38 dB | 35 - 42 dB | 40 - 48 dB (High-STC) |
| Surface Finish Options | Satin Brushed / Hairline / Mirror | PVD Vacuum Ion Titanium Coating | Architectural Wood Grain / UV Gloss |
Designed for beachfront villas, island resorts, and coastal infrastructure in regions like the Middle East, Southeast Asia, and Florida. Uses Grade 316 stainless steel with specialized anti-corrosion passivation and PVD vacuum coating to resist heavy salt spray without surface pitting.
Flush-surface stainless steel doors engineered without exposed seams or crevices, preventing dust accumulation and microbial growth. Compatible with automated interlocking systems and chemical decontamination washdowns in biotech labs and hospitals.
Heavy-duty bulletproof and blast-resistant steel doors designed for financial institution vaults, data centers, government complexes, and military facilities. Outfitted with multi-point electronic smart locks, biometric access, and structural steel reinforcement core grids.
Standardized, fire-rated FD60/FD120 emergency exit and apartment entrance doors designed for fast installation in high-density residential towers and commercial centers across Europe, North America, and Central Asia.
Robust, weather-tight steel doors providing blast resistance, electromagnetic shielding capabilities, and extreme durability against industrial vibrations and harsh temperature swings.
Grand pivot doors and customized entryways featuring integrated smart access controls, fine wood-grain veneers over steel armors, and oversized glass panels with high thermal efficiency.
Located in Zhejiang Province—the global hub of door manufacturing and architectural hardware production—Larsom Door leverages an unmatched localized industrial ecosystem. Within a 50-kilometer radius, we source certified raw stainless steel coils, high-security cylinder locks, intumescent fire gaskets, and precision hardware fittings with minimal transit lead times.
This concentrated supply network eliminates global supply chain bottlenecks, ensuring uninterrupted raw material input even during macro-economic volatility.
With an automated 16,000 m² plant, CNC laser cutting arrays, and robotic bending stations, we minimize material waste and cut labor overhead. The resulting operational cost savings are passed directly to our overseas clients, giving B2B buyers a distinct competitive edge without compromising on structural integrity or finish quality.
Our in-house engineering team provides complete 2D CAD shop drawings and 3D BIM models for seamless integration into architectural construction blueprints prior to factory mass production.
Larsom products comply with rigorous international testing regimes including CE certification, ISO 9001 quality systems, UL 10C fire resistance standards, and European EN 1634 safety norms.
We offer turnkey white-labeling services, custom hardware integration, specialized keying systems (Master Key Systems), and tailored export packaging designed for real estate developers and distributors.
Larsom Door