How this node works
Exposed steel must be protected to reach the R class: board encasement or plaster on lath at the soffit, or intumescent paint. Topping and tavelloni screen the top flange.
Key points
- Steel beam
- Fire protection (boards/plaster)
- Plaster-carrying lath
- Tavellone
- Topping
- R class achieved
Conceptual, language-neutral drawing for study and orientation — not an execution drawing. Dimensions and verifications belong to the designer.