Area of use
Advantages with the BSF system
- Gives freedom in design
- Columns without corbels/supports
- Moment stiff connections, Fly Seismic.
- Precast beams and columns in seismic zones, Fly Seismic.
- Elegant solution for round columns
- CE mark/ETA approval
- Standard reinforcement
- Simple and safe to erect on site
- Design tools
- Reduced number of precast elements and connection points
- Environmentally better buildings
Movie – Beam – column connection

Fly Seismic
- Moment stiff connections, Fly Seismic.
- Precast beams and columns in seismic zones, Fly Seismic.
For more info about Fly Seismic, follow the link.
IC Academy
For more info and films, see IC Academy. Engineering and assembly.

Capacity and minimum beam dimension
The system have individual capacities ranging from 225 kN to 700 kN.
By optionally using BSF connectors in pairs, loads of up to 1400 kN can be catered for.
Type | Description | Capacity | Minimum beam dimension |
BSF 225 | Beam Column connection | 225 | 190 x 370 |
BSF 300 | Beam Column connection | 300 | 190 x 420 |
BSF 450 | Beam Column connection | 450 | 190 x 440 |
BSF 700 | Beam Column connection | 700 | 310 x 500 |
BSF 450 x 2 | Beam Column connection | 900 | 350 x 440 |
BSF 700 x 2 | Beam Column connection | 1400 | 600 x 500 |
BSF 1100 | Beam Column connection | 1100 | 310 x 590 |
Short guide and Academy
Click on the link to go to the Academy. In the Academy you can see how to use the system.
The appendix describes how to calculate and use the system.
Product sheet
Link to productsheet can be found here.
Approval
The Invisible Connections products has a ETA approval and are all CE market.
You can study the ETA by following the link below