Discover our highly rated armor designs, blast resistant portals, and architectural security solutions.
Zhejiang Larsom Door Co., Ltd. is an industry-leading, professional manufacturer specializing in the research, development, production, and global distribution of elite-grade security doors, bullet-resistant entry systems, armored barriers, and high-performance steel-wood customized entrance solutions.
Established as a benchmark of engineering precision, Larsom Door provides safety-critical configurations and high-aesthetic architectural portals. Operating from our advanced manufacturing complex spanning over 16,000 square meters, our production lines are powered by more than 160 dedicated, highly skilled specialists. Our commitment to operational excellence yields a steady daily output exceeding 200 sets of premium doors, allowing us to manage large-scale commercial contracts and complex custom architectural designs simultaneously.
Our heavy investment in CNC machinery and robotic production guarantees consistency. The facility features automated CNC laser cutters, high-speed turret punch machines, automated sanding platforms, precise plate bending equipment, and environmental-compliant powder-coating lines. This integrated machinery setup minimizes tolerances to a sub-millimeter scale, crucial for structural alignment in ballistic systems.
Our structured production workflow utilizes multi-stage quality control to guarantee high dimensional accuracy and bulletproof integrity.
Continuous inspection of door cores, internal reinforcing steel grids, and final composite bonding structures.
Understanding the requirements of enterprise-level buyers, security engineers, and commercial developers.
Corporate procurement relies heavily on defined international ratings. Larsom designs doors to meet standard configurations including UL 752 Levels 1 through 8. These specifications determine the door's capacity to resist threat profiles from 9mm handguns up to 7.62mm military assault rifles firing armor-piercing rounds.
For European and Middle Eastern regions, certifications compliant with European standards FB4, FB6, and FB7 are required. Our doors feature internal composite layering consisting of specialized high-hardness ballistic plates and aramid fiber sheets to prevent interior spalling upon ballistic impact.
Industrial contracts often require non-standard dimensions, integrated side lites, and specific door hardware. Larsom supports OEM/ODM projects with detailed CAD/BIM drawing approval stages, custom lock preps, and structural tests before bulk manufacturing.
| Protection Rating Class | Tested Weaponry Class | Caliber / Projectile Mass | Min Bullet Velocity | Internal Armor Thickness |
|---|---|---|---|---|
| UL 752 Level 3 | Super 357 Magnum / Handguns | 158 grain (10.2 g) JSP | 1395 ft/s (425 m/s) | 4.0 mm High-Tensile Steel |
| UL 752 Level 4 | High-Power Hunting Rifle | 180 grain (11.7 g) JSP | 2540 ft/s (774 m/s) | 6.0 mm Ballistic Steel Plate |
| UL 752 Level 8 / FB6 | Military Assault Rifle (M16 / AK-47) | 150 grain (9.7 g) Lead Core / Steel Jacket | 2750 ft/s (838 m/s) | 8.0 mm + Aramid Fiber Matrix |
| UL 752 Level 8 AP / FB7 | Armor Piercing Rounds (AP) | 166 grain (10.8 g) Hardened Steel Core | 2710 ft/s (826 m/s) | 12.0 mm Double-Shield Armor |
Providing engineered access control and ballistic shielding across critical infrastructure and commercial properties.
Banks, currency exchanges, and commercial vault vestibules require security doors that integrate with electromagnetic locks and silent alarm sensors. Larsom's heavy armored doors provide resistance against physical forced entry, mechanical tools, and high-velocity ballistics, maintaining core security during high-risk scenarios.
Embassies, consulate offices, and critical command centers require ballistic and blast-resistant structures. Our heavy-gauge galvanized steel skins and welded structural stiffeners are designed to withstand physical pressure wave differentials while maintaining operational performance.
Private luxury residences require high levels of security without compromising on aesthetic design. Larsom's custom armored villa entrance doors feature external copper carvings, high-density real wood veneers, and modern designs that enclose a high-strength ballistic steel core.
Unmanned infrastructure installations, data server warehouses, and distribution centers require robust doors with passive fire defense and vandal-proof ratings. Larsom's industrial armored fire doors deliver high-security sealing with certified 3-hour fire-barrier performance.
A look into Larsom’s R&D department and our integration of advanced composite materials.
Standard ballistic doors are often heavy, placing strain on wall structures and hinges. Larsom is developing dynamic multi-layer configurations that combine ultra-high-molecular-weight polyethylene (UHMWPE) fiber sheets with hardened ceramic tiles. This technology reduces weight by up to 35% while maintaining target ballistic defense levels.
Security involves both physical strength and smart access control. Our next-generation systems integrate biometric readers, encrypted digital keypad configurations, and IoT connections directly into the frame assembly. This allows real-time monitoring of lock status, remote lockouts, and silent alarms linked to emergency dispatch services.
Ballistic doors must also function well as external building envelopes. Larsom uses polyurethane foam injection, specialized aerogel insulation, and perimeter acoustic drop seals. This dual-purpose design provides energy efficiency, weather resistance, and sound reduction of up to 45dB.
Exporting high-security equipment to over 130 countries requires compliance with local import rules, trade regulations, and international transport standards. Larsom Door provides comprehensive trade support to streamline international delivery:
Customs Documentation: We provide full customs documentation, HS-Code classification (typically 73083000 for metal doors), and test certification paperwork required by port officials worldwide.
Rigorous Packaging: Given the weight of these doors (often exceeding 250 kg per unit), we package products in reinforced, ISPM-15 certified heat-treated wooden crates. Edge guards and shock-absorbing layers prevent damage during maritime transport.
Installation Guidance: Each door system includes customized anchor bolt kits and structural drawings detailing masonry tie-ins and frame grouting procedures to ensure proper installation.
Answers to key technical and procurement queries regarding armored and bulletproof entry systems.
Complementing our high-security line with acoustic, interior, and pivot door configurations.
Larsom Door
