BSF is a console-free system and consists of three parts:

• Beam unit: Cast into the concrete beam and must be anchored with specified anchoring reinforcement.
• Beam-beam unit: Cast into the concrete beam and must be anchored with specified anchoring reinforcement.
• Knife/sledge: Connect the beam to the column. This is made of solid steel and forms the part of the connection that transfers the load from the beam to the column. Before beam assembly, the knife is retracted and hidden inside the beam unit.

All parts are made of steel. The three main components are in steel grade S355. Threaded rods are quality 8.8, and stop washers are in steel quality S355.

Design principles
When the knife is in place in the column, it acts as a cantilever from the beam end. The load is applied to the end of the knife where it is transferred to the bottom plate in the column box. The moment from the cantilever is balanced by the knife having support against two semicircular steels inside the beam box, one at the front edge of the beam box and one on the underside of the box at the rear end of the knife. Anchoring reinforcement bent around these semi-circular steels the support forces from the knife further into the concrete beam.