Mar 12,2025
Scenario 1: Firestop for Cable Through-Penetration Openings
Product Name: VM Multi-Configuration Firestop Block
Solution:
The VM multi-configuration firestop block is applied to construct fire compartments between building structures, compliant with UL 1479 (ASTM E814) Third Edition (2007) and referenced in C-AJ-8318/UL-Systems.pdf. With intumescent performance certified per UL 1479 Sec.7, the block expands to form a dense char layer upon exposure to the standard time-temperature curve (1850°F/1010°C at 2hr, Table 4.1), achieving F Rating - 2 Hr (UL-Systems.pdf C-AJ-0150) and T Rating thermal control (≤325°F temperature rise, UL 1479 Sec.9.1)
Technical Specifications:
- Installation Compliance:
Installation and system expansion are streamlined, enabling adhesive-free installation via mechanical fastening (per C-AJ-8318 Sec.4.4 & UL 1479 Sec.4.3). - Physical Properties:
Lightweight design (100-150 pcf density, C-AJ-8318 Sec.1) with ≥80% rebound resilience, compliant with UL 1479 Sec.7.5 expansion factor test (10:1 expansion ratio). - Load-Bearing Capacity:
Supports rigid mounting of ≤4 in. diameter cable bundles, meeting the annular space requirements (min 0 in. point contact to max 4 in. clearance, C-AJ-8318 Sec.2).
Testing & Certification:
- Fire resistance verified via UL 1479 hose stream test (30 PSI, 1.5 sec/ft², Sec.5) and ambient/elevated temperature exposure tests (Sec.6-6A).
- Complies with FM Global equivalent standards based on UL 1479's intumescent material evaluation (e.g., expansion pressure test ≤3σ of as-received samples, Sec.7.4).
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