superstructure

A physical or conceptual structure extended or developed from a basic form.

The part of a building or other structure above the foundation.

The parts of a ship’s structure above the main deck.

The rails, sleepers, and other parts of a railway.

In Marxist theory, the ideologies or institutions of a society as distinct from the basic processes and direct social relations of material production and economics.

Any structure built on something else; particularly, an edifice in relation to its foundation.

Hence, anything erected on a foundation or basis.

In railway engin., the sleepers, rails, and fastenings of a railway, in contradistinction to road-bed.

Any material structure or edifice built on something else; that which is raised on a foundation or basis.

The sleepers, and fastenings, in distinction from the roadbed.