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Aestuver® fire protection boards
Fire rated cable enclosures
Special Constructions
Expansion joints for construction
Our D+2 product doesn't get enough attention. Therefore, we decided to give our readers more details about it. Dive in if you want to lear more about the lightweight solution for cable trouch covers. When it comes to protecting critical infrastructure, especially in tunnels, industrial facilities, or anywhere cables need reliable coverage, choosing the right cable trough lid makes all the difference. Our Aestuver cable trough lids (often referred to in technical docs as the D+2 system) deliver non-combustible performance - (A1 fire classfication), serious load-bearing capacity, and long-term durability that installers and specifiers actually appreciate.
Cable routes are lifelines. They carry power, data, and communication lines that keep everything running. But they’re also vulnerable—to fire, mechanical damage, moisture, and heavy foot traffic. A basic lid won’t cut it in demanding environments. You need something engineered to handle real-world abuse while meeting the strictest fire safety standards.
That’s exactly what this cement-bound, glass-fibre reinforced lightweight concrete cable trough lid provides.
One of the standout features is its A1 classification according to DIN EN 13501-1—the highest non-combustible rating. This isn’t just marketing speak; it’s backed by independent testing from MFPA Leipzig. The material shows virtually zero contribution to fire, with excellent performance in both the non-combustibility (EN ISO 1182) and heat of combustion (EN ISO 1716) tests.
For applications requiring higher fire resistance, the system can achieve I 90 and E 90 ratings when the full construction is properly verified. Whether you’re designing escape routes or protecting cable installations in high-risk areas, this gives you peace of mind.
These cable trough lids aren’t just fireproof—they’re tough:
The lids come in three configurations (Type I, II, and III) to match different load requirements:
You can achieve traffic loads up to 19 kN/m² depending on span and type, making them suitable even for more demanding areas. The clever step-fold (Stufenfalz) design ensures proper fire-safe overlapping at joints—50 mm offset that protects transverse seams effectively.
lid 500mmx450mmx55mm - 13.5kg lid 1000mmx450mmx55mm - 27kg
These cable trough lids are ideal for:
When specifying a cable trough lid, you shouldn’t have to compromise between fire safety, mechanical performance, and practicality. This system delivers on all fronts—proven A1 non-combustibility, robust load capacity, and excellent durability in tough environments.
If you’re working on a project that needs reliable, code-compliant cable protection, get in touch with our technical team. We’re happy to help you select the right type and configuration for your specific span, load, and fire resistance requirements.