GSG provided structural engineering services for Metra Bridge 87, a 5-span through plate girder bridge carrying the Rock Island District Line over the Belt Railway and Norfolk Southern tracks. The project involved structural repairs and raising key spans to a new elevation.

Scope of Services

• • Construction sequencing and design of a custom shoring system
  • Steel girder reinforcement and sub/superstructure repair plans
  • Elevation of spans 3, 4, and 5 by up to 18 inches
  • Shoring system design using micro-pile-supported towers, timber-tie bents, and columns
  • Construction plans, specifications, design calculations, and cost estimates