Designed to meet stringent EN 16034 and DIN standards, these premium configurations provide seamless integrations of architectural aesthetics, fire isolation barriers, and anti-burglary engineering properties.
Berlin's local architecture and real estate landscape are defined by strict regulations that demand the highest levels of structural safety. The Berlin Building Code (Landesbauordnung Berlin - BauO Bln), aligned with the German Federal Model Building Regulation (Musterbauordnung - MBO), sets meticulous parameters for passive fire containment. For commercial properties, multi-family residential complexes (specifically building classes 4 and 5), and public spaces like the Berlin-Brandenburg region’s transport hubs or server centers in Adlershof, structural safety is non-negotiable.
Historically, fire protection was cataloged under the German DIN 4102-1 standard. Today, products installed within the EU must comply with European Harmonized Standards—specifically EN 16034 (for fire-resistant and smoke-control gates, doors, and openable windows) and EN 14351-1 / EN 14351-2. When sourcing fire-rated armored entrance solutions for Berlin development projects, procurement professionals face the challenge of sourcing structures that combine:
A classic challenge in structural engineering is avoiding thermal bridging while ensuring high structural security. Armored doors utilize a dense multi-ply core consisting of manganese steel plates, hardened anti-drill perimeter plates, and multi-point locking pins. These highly conductive steel elements run counter to fire rating principles, which require thermal decoupling to block high-temperature expansion from breaching structural limits.
Larsom Door addresses this through a proprietary structural framework: structural composite panels consisting of high-density rockwool cores (exceeding 120 kg/m³), calcium silicate fireboards, and high-performance intumescent expansion gaskets. Under temperature exposures exceeding 150°C, these specialized gaskets expand to over 10 times their volume, sealing all perimeter lock gaps and mechanical frame interfaces to prevent toxic gas leakage (Sa / S200 smoke rating).
Zhejiang Larsom Door Co., Ltd. is a leading specialist manufacturer focused on the design, research, development, and international supply of high-end armored fire-rated doors, industrial security steel doors, and bespoke architectural entrance solutions.
Operating out of a modern manufacturing infrastructure spanning over 16,000 square meters, our facilities are equipped with automated production machinery, CNC laser cutters, high-precision punching equipment, and assembly stations capable of processing large-scale orders. With a daily capacity exceeding 200 sets of premium doors, we serve a global clientele of architectural developers, distribution channel partners, and civil contractors.
Below is an overview of our state-of-the-art production workflow, ensuring precise mechanical tolerances, structural alignment, and long-term durability:
For European buyers, importing custom building materials involves strict cost-benefit analysis and risk management. Larsom Door leverages Chinese industrial manufacturing clusters to optimize production steps, raw material sourcing, and assembly workflows. This allows us to supply fire-rated security doors that meet or exceed local German quality requirements, while offering competitive manufacturing costs compared to regional European suppliers.
Our proximity to domestic high-grade metallurgical clusters provides stable access to raw steel sheets, galvanized steel, and performance alloys. We source 1.5mm to 2.0mm high-tensile cold-rolled steel coils, which are processed on automated leveling and shearing systems. Our factory also uses premium eco-friendly MDF, specialized high-density rockwool sheets, and high-performance powder coats to ensure long-term resistance to corrosion and structural warping.
To eliminate manual errors, structural cutting, pocket milling, and latch routing are handled by CNC laser centers and punching stations. This automated manufacturing setup ensures a precise fit for hinges, locks, and drop seals, maintaining tolerances within 0.1mm. This level of precision is critical for maintaining smoke and fire ratings (EN 1634-1 testing criteria) over years of use.
Our supply chain accommodates modern intermodal shipping models serving Berlin-Brandenburg hubs:
Architectural doors do not operate in a vacuum. They are critical elements of life safety and property security. Our doors are customized for specific application contexts across Berlin's diverse districts:
Large transport hubs, such as those operated by the BVG or Deutsche Bahn in Berlin, require custom double-leaf escape portals that can withstand heavy daily traffic and pressure changes while maintaining wind resistance and waterproofing.
Class Spec: EI90 + RC3 / RC4 + IP56For technology complexes like Adlershof, where intellectual property and servers require physical protection, our doors combine clean modern finishes (MDF, aluminum skins, or glass apertures) with internal armored plating and certified fire ratings.
Class Spec: EI30 / EI60 + RC3 + 40dBFrom apartment complexes in Berlin-Mitte to luxury villas in Grunewald, entrance doors must complement the building's facade. Larsom offers custom configurations featuring modern milled panels, timber veneers, and concealed security locks.
Class Spec: EI30 + RC2 / RC3 + Thermal BreakLarsom doors are compatible with standard European hardware templates. We provide pre-cut configurations and internal reinforcement structures for the integration of:
Explore our full line of specialized door systems, featuring robust designs for high-security applications and heavy-duty steel options built to protect critical infrastructure.
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