Hi,
No, monolith structure isn’t a library part, so you don’t have information about it’s parameters in a label.
It’s properties are accessible, try the “Classification and Properties Label” for a demonstration.
It is possible to define a property whose value is an expression, and this expression can be the building material of the object. Though currently stair structure surfaces aren’t available in a property expression.
Péter Baksa
Library Platform, Software Engineer
GRAPHISOFT SE