Substructure & superstructure

The substructure consists of the underlying soil, bridge, tunnel or fly-over, on which the tracks are laid. The superstructure comprises of the bed of coarse stone chippings (known as ballast), the sleepers and the tracks. The safety installations, portal structure and catenary equipment aren’t part of the superstructure. (Source: Rail Cargo, "Rail infrastructure glossary")

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Substructure & superstructure | Infrasite

Substructure & superstructure

The substructure consists of the underlying soil, bridge, tunnel or fly-over, on which the tracks are laid. The superstructure comprises of the bed of coarse stone chippings (known as ballast), the sleepers and the tracks. The safety installations, portal structure and catenary equipment aren’t part of the superstructure. (Source: Rail Cargo, "Rail infrastructure glossary")

Other languages
80282883