Steel structure manufacturer since 2009 · 8 fabrication bases in China
Floor & Envelope
ALC wall panels for fire-rated, quiet walls on steel frames
ALC panels are autoclaved aerated concrete reinforced with steel mesh: light enough to fix to a steel frame, solid enough for fire walls. A fire wall is rated as a whole system, so the fixings and joints matter as much as the panel. ALC is not ACP (aluminium composite panel).
500–650 kg/m³
Dry density
75–200 mm
Panel thickness
Up to 4 h
Fire resistance, by system
Not ACP
Concrete, not aluminium
Typical properties
ALC panel data
| Propiedad | Valor típico | Nota |
|---|---|---|
| Dry density | 500–650 kg/m³ | About a quarter of normal concrete |
| Thickness | 75–200 mm | External walls usually 150 mm+ |
| Width × length | 600 mm × up to 6 m | |
| Fire resistance | About 3 h at 100 mm; over 4 h at 150 mm | Wall system test report governs |
| Sound reduction | 40–50 dB | Depends on thickness and joints |
| Thermal conductivity | 0.13–0.16 W/m·K |
Product standard GB/T 15762-2020; application JGJ/T 17-2020. Supplier datasheet to be attached.
Fire walls
Why a panel certificate is not enough
Authorities accept a fire wall on a test report for the whole wall: panel, thickness, fixings, joints and penetrations (GB/T 9978.1 in China; EN 1364-1 or ASTM E119 elsewhere).
- Wall built from the floor to the underside of the beam or slab, top gap filled with fire-rated material
- Joints sealed with fire-rated mastic
- Pipes and ducts through the wall sleeved and fire-stopped
- Supporting steel protected to at least the wall rating
- Doors in the wall fire-rated to match
- Concealed work photographed before it is closed
From our engineers
Fixing ALC to a steel frame
Allow for movement. Steel frames sway and deflect more than concrete. Panels are fixed with hook bolts or sliding clips so the frame can move without cracking them.
Deflection head. At the beam soffit, a movement joint takes beam deflection; it is filled with fire-rated material on fire walls.
Girts sized for panels. ALC is heavier than sheet cladding. Girts and brackets are designed for its weight and wind load, which is why we size them together.
Uses
Where ALC fits
External walls
On steel girts or between columns, finished with coating or cladding.
Fire and compartment walls
Fire-rated separation in warehouses and plants.
Partitions
Offices, hospitals and schools needing solid, quiet walls.
Not to be confused
ALC panel vs ACP sheet
| ALC panel | ACP (aluminium composite panel) | |
|---|---|---|
| Material | Autoclaved aerated concrete with steel mesh | Two aluminium skins with a polymer or mineral core |
| Rol | Wall infill, fire wall, partition | Decorative facade cladding |
| Fire | No combustible | Depends on core; PE cores are combustible |
| Peso | Heavy compared with sheet | Very light |
How are ALC panels fixed to steel?
With hook bolts, angle brackets or sliding clips to girts or beams, allowing for frame movement.
Do ALC walls need plaster?
Usually a skim coat and paint, or cladding on external walls.
Do you supply ALC from your own plant?
ALC supply route to be confirmed: own plant or partner plant.
ALC quote
Send wall areas, heights and fire ratings
We return panel thickness, fixing system and quantities.