Sweden Pack · model hub
Stair
Trappa
A circulation assembly where regulation, not the model, sets most of the binding requirements.
Reviewed
Model entry
Revit
Stairs category, a stair assembly with runs, landings and supports
IFC
IfcStair with IfcStairFlight components, typed by IfcStairType
LITHIC category
stairs
Quantity basis
Each (count) per flight or per stair; area (m²) for landings
Classification placement
Where this element is normally designated in each Swedish reference system. Code values stay with their publishers.
| System | Designated in | What it establishes |
|---|---|---|
| CoClass | Functional systems (circulation), then Constructive systems and Components | Circulation duty first; prefabricated concrete or steel-and-timber second. |
| BIP | Object designation plus dimensional property designations | Makes the geometry of the flight comparable across models. |
| BK04 | Group and article — prefabricated flights, treads, coatings | Candidate supply for a stated flight requirement. |
Where it enters the chain
Identity → classification → contract → recipe. Rise, going and width limits come from PBL/BBR, not from the family.
What a code lookup does not settle
- Monolithic stairs and prefabricated flights are different decisions with different quantity bases.
- A compliant-looking stair in the model is not a compliance check.