Common use of Substructure Clause in Contracts

Substructure. All of that part of a bridge structure below the bridge seats, including the parapets, backwalls, and wingwalls of abutments.

Substructure. All of that part of a bridge Bridge structure below the bridge seatsseats or below the skewbacks of arches, including back walls, wingwalls and wing protection railings, except back walls designed integrally with the parapets, backwalls, and wingwalls of abutmentsSuperstructure.