Products

A completely premade unit, built in our factory and shipped to site ready to be simply lifted into position, and fixed to the floor casting deck, or steel frame before concreting takes place.

Specifier Notes

Application:
Designed for open floor slab construction, the AlphaRiser CIR is a pre-assembled cast-in riser unit suitable for fixing directly to the casting deck or supporting primary steelwork.

Construction Features:

• All sides use AlphaRiser channel shuttering for full integration into the concrete slab.
• Alternative edge configurations (CWL version) available for non-standard sides.
• Angled riser openings supported via bend-formed joist ends.
• Joist layout optimised for service penetration alignment and grating support.

Fixing Options:

• To casting deck: Long-reach screws secure the unit through the grating; removable after casting to leave a fair-faced soffit.
• To steelwork: Fixed via pre-drilled bottom flange holes using shot-fire or fine-thread fixings. Extended flanges available to reach steel supports; large extensions may require temporary propping or gusseting.

Integration with Wall Systems:

• Compatible with Comtec WallBeams for supporting fire-rated partitions via AlphaRiser channel integration.

Slipform & Jumpform Compatibility:

• SF Channel: Cast-in via coupling clamps/plates during slipform wall construction.
• JF Channel: Fixed to formwork for jumpform walls to provide continuous channel at riser positions.

Alternative Core Wall Interface:

• The FreeBeam channel is recommended to be used on a side of the riser that interfaces with the core wall. This allows the core to be cast incorporating a vertical wall channel (VWC) which simply accepts the fixing of the riser unit through the FreeBeam.
• SF Channel must be used where horizontal firestopping is required as the FreeBeam does not currently satisfy horizontal fire stopping requirements.