Hartford, CT

Hartford Water Pollution Control Facility, Dry Ash Handling Building


The new Dry Ash Handling Plant at the Hartford Water Pollution Control Facility included a slender, pre-engineered steel handling building. During a strong wind event, the partially erected steel frame underwent significant lateral displacement. Shortly after, the contractor and the erector replumbed the frame and installed additional bracing. The contractor engaged SGH to assess the frame’s condition and determine the cause of displacement.

SGH visited the site to assess the condition of the partially erected steel building, including columns, beams, connections, baseplates, and anchor rods, and determine the cause of the damage. Highlights of our investigation include the following:

  • Evaluated additional bracing installed by the contractor and the erector after the building was replumbed to determine if it had adequate strength to resist code-prescribed wind load for structures during construction
  • Developed an inspection plan to evaluate steel components installed during the wind event and to identify damaged components
  • Visually inspected anchor rods and nuts for thread deformation and mezzanine beam-to-column connections for plastic deformation
  • Oversaw magnetic particle testing of the column-to-baseplate welds by others and recommended repairs for locally damaged components
  • Analyzed the structure and developed a sequencing plan for erecting the remaining structural steel, equipment, cladding, and masonry walls that would maintain the stability of the structure
  • Performed additional calculations and designed additional temporary bracing to accommodate changes in the erection plan

Project Summary



Completion Date
Failure Investigation
Structures | Advanced Analysis
Specialized Capabilities
Temporary Construction | Failure Analysis

Key team members

Aaron Lewis
Aaron Lewis
Structural Engineering Region Head, East