CCN Internally Framed Fire Door Sets
Stiled and railed fire door sets have an internal framework about the core, to combine advanced fire resistance with high-performance sound attenuation and other benefits, such as hygrothermal performance. Our stiled and railed fire doors are engineered with a robust internal perimeter frame and specialized core materials, these doors meet stringent fire ratings while significantly reducing sound transmission and providing material separation and fixity. Ideal for environments requiring both safety and acoustic control, as well as humidity, vapour diffusion, in modern well-insulated buildings. These doors are idealy suited for commercial, residential, and institutional applications where performance and compliance are critical.
Construction
A fully stiled and railed door leaf comprising of a (typically) flaxboard inner core surrounded by timber perimeter framework, with surface facias in HDF, to enhance fixity and provide the ideal substate for the applied finish. This differs from the solid GDC doors, which rely upon the core for stability, fixity and to support applied finishes and lipping.
Thus the stiled and railed door has the build standard to both satisfy the performance required of the application, and advance it to higher levels.
Performance specification
Fire – FD30 / FD60
Acoustic – Up to Rw40dB for 44mm, up to Rw42dB for 54mm, up to Rw46dB for 71mm
Density – average bulk density 620kg/m3 / 27kg/m3
Sizes – bespoke, made to order, within certification parameters.
Tested to – BS 476 / EN 1634 -1 & 3 / EN1191/EN1192: Severe duty / EN 1121-EN1294 / EN 140-3
Independently Certified under BM Trada Q Mark Scheme
| Internal | External | Fire | Acoustics | Hinged | Pivot | Hygrothermal | PAS24 |
|---|---|---|---|---|---|---|---|
| ✔ | ✖ | Up to FD60 | 35dB (44mm) 38dB (44mm) 40dB (44mm) 42dB (54mm) 46dB (71mm) | ✔ | ✔ | ✔ | ✖ |
Internally Framed Fire Doors – Technical Overview
CCN Stiled and Railed doors do not require timber lipping, for performance due to internal framework, and have been fire tested without lipping’s passing at 81 minutes! Lippings may be desirable (particularly on verticals) to add protection to exposed edges. The stiled and railed door has the build-standard required of the specific performance requirements of the application.
The HDF coverings to 900kg/m3, provide a very robust door face with a totally flat substrate. This is ideally suited for factory painted doors, as well as veneers, laminates and PVC.
An internally framed flax fire door is engineered for internal applications within buildings, offering certified fire resistance with additional sustainability and weight-reduction benefits. The core construction and integrated fire-resistant technologies are designed to inhibit the spread of fire and smoke, providing critical egress time in fire scenarios.
Key Features
- Core Composition
Constructed with a solid core made from flaxboard, particleboard, or solid timber—materials chosen for their low combustibility and ability to resist fire spread under elevated temperatures. - Intumescent Sealing System
Factory-fitted intumescent seals are positioned along the door’s perimeter. These seals expand when exposed to heat, forming an insulating barrier that restricts the passage of flames, smoke, and hot gases. - Certified Fire Rating
Fire doors are tested and classified to withstand fire for a defined duration, typically FD30 (30 minutes) or FD60 (60 minutes), in accordance with applicable building regulations and fire safety standards. - Door Construction
Doors may feature an internal timber frame surrounding the core and are typically finished with high-performance facings such as hardwood veneers, plywood, or HPL (High Pressure Laminate) for enhanced durability and aesthetics.
Advantages of Flaxboard Core
- Fire-Resistant Behavior
Flaxboard, composed of densely compacted natural fibers, chars rather than ignites, contributing to the delay of fire propagation through the core. - Sustainability
Derived from renewable plant-based sources, flaxboard is a sustainable material option, supporting environmentally responsible construction practices. - Lightweight Design
Compared to mineral or denser timber cores, flaxboard offers a lighter alternative, simplifying door handling, installation, and hardware compatibility.
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