Bridge Design
Bridge Ratings
Bridge Rehabilitation
Bridge Inspection
Bridge Construction Systems Design
Hydraulic Reports
Building Design
Building Evaluation
Concrete Slabs-on-Grade
Concrete Structures (Cast-in-Place
   and Precast)
Water/Wastewater Structures
Agricultural Structures
Structural Steel Systems
Timber Structures
Roof Framing
Retaining Walls
Existing Structure Evaluation
Construction Engineering

With four licensed Structural Engineers on staff, and the support of an experienced technical staff, Willett, Hofmann & Associates, Inc. Structural Engineering Department can provide structural engineering services for projects of any size or complexity. WHA provides structural engineering services for new construction, rehabilitation and restoration of highway and railroad bridges; new construction, renovation and additions for building structural systems; existing structure evaluation reports and load rating analysis for both bridges and buildings; and construction engineering for projects of various sizes and complexities.

WHA bridge structure engineering capabilities and experience encompass all phases of bridge design— preliminary studies, hydraulic studies, and plans and specifications for a variety of bridge types. Our structural engineering staff excels in the design of cofferdams, formwork, erection plans and demolition plans. Our building structure engineering capabilities include foundation systems, wall systems, floor systems, roof systems and equipment support structures for a variety of building types and complexities.

Our long association with the Illinois Department of Transportation (IDOT) and other agencies expedites the review and approval process required for highway bridge projects under their jurisdiction. Our staff includes certified Bridge Program Managers and Team Leaders who have been judged by IDOT to be qualified to ensure that bridges are inspected as described in the National Bridge Inspection Standards of the Code of Federal Regulations.

Continuing education keeps us current with developing technologies and design codes to better serve our clients. Our Structural staff is equipped with Building Information Modeling (BIM) software and experienced in the design of a variety of structural materials and types of building structural systems. With a continuing commitment to both personnel and technology, Willett, Hofmann & Associates, Inc. is qualified for structural projects of any complexity.

Captain Swift Bridge

Captain Swift Bridge WHA’s award winning design for a bridge replacement project incorporates historical concepts and the environmental context to provide an aesthetically appealing structure meeting 21st century interstate loading requirements. Download the details here!

Tinker Swiss Cottage Bridge

Tinker Swiss Cottage Bridge WHA’s successful design for a replication of a popular landmark within modern safety standards required a unique combination of aesthetic ingenuity and structural integrity. Download the details here!

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