Project Owner

F.H. Paschen, S.N. Nielsen


Omega III, LLC

Services Provided

Structural Engineering
Demolition Procedure


Chicago, IL

Year of Demolition


COMED Bridge #8 Demolition Procedure


HBM Engineering Group, in collaboration with Omega III, was entrusted with the structural engineering services for the demolition plan of COMED Bridge #8 over S Commercial Avenue in Chicago. This comprehensive plan navigates the meticulous deconstruction of a vital structure with precision and safety at its core.

Bridge Data:

  • Length: 109’-11”
  • Width: 71’-11”
  • Number of Spans: 2
  • Skew: 50 degrees
  • Number of Built-Up Girders: 10
  • Slab Thickness: 9.5 inches


HBM’s Scope:

  • Structural Engineering
  • Demoliton Analysis and Procedure

Demolition Procedure:

  1. The plan begins with a thorough utility assessment, ensuring safety in proximity to overhead wires.
  2. A meticulous road closure strategy is employed with safety measures to prevent unauthorized access.
  3. The demolition process is slated for a 7-day duration, with Omega ensuring on-site safety and adherence to protocols.
  4. The removal sequence involves the careful elimination of ballast, deck, floorbeams, girders, and steel bent components.
  5. All steel and concrete debris are responsibly processed and disposed of at legal recycling facilities.
  6. Decontamination measures are instituted for workers dealing with steel assumed to have lead paint.
  7. A well-defined deck removal process, involving excavation and torch cutting, is executed with precision.
  8. Girder removal employs strategic cutting, lifting, and placement, ensuring controlled and safe procedures.
  9. Bent/pier removal involves torch cutting, hydraulic breaking of concrete, and responsible disposal.
  10. The equipment roster includes an 87K excavator, LTM 1130.51 crane, 40K loader, and skid steer.

Structural Analysis: MDX software was employed for Load Factor analysis, affirming the bridge’s robustness against demolition equipment loads. The models considered as-built conditions, section loss, and additional dead loads, ensuring a meticulous understanding of the structure’s response.

With a meticulous plan, adherence to safety standards, and cutting-edge structural analysis, the COMED Bridge #8 Demolition Procedure exemplifies HBM Engineering Group's commitment to excellence in infrastructure deconstruction.