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Structures, Inc.

Supporting the Past - Structuring the Future

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About the firm

Structures, Inc. is a structural engineering practice headquartered in St. Louis, Missouri. Founded in 1994 as Structures Unlimited Inc., it provides structural design and engineering services across commercial, industrial, municipal, and institutional construction markets. Holding engineering licenses in 10 Midwestern states, the practice operates on two founding principles: responsiveness to client schedules and the production of constructible, highly practical designs. Engineering services span building and bridge engineering, industrial structures, contractor support designs, unique specialty structures, and steel connection design.

Established
1994
Team
Small
Firm type
Structural Engineering

Credentials

Licensed in 10 Midwestern states: MO, IL, KY, AR, IN, IA, KS, NE, OH, WI · Professional Engineer (PE) registrations: AR, IN, IA, KS, KY, MO, OH, TX, WI · Structural Engineer (SE) registrations: IL, NE, OK

People

John J. GruendlerChief Structural Engineer & President

Roy E. Jennings, IIIChief Project Engineer & Sr. Vice President

Capabilities

Building Engineering

Service website

Comprehensive analysis and structural design for commercial and industrial facilities, emphasizing structural modifications, rehabilitation, seismic retrofits, and new building construction.

  • New Building Construction Design
  • Structural Modifications and Rehabilitation
  • Seismic Retrofits and Upgrades
  • Temporary Bracing and Falsework Structural Design
  • Construction Document and Estimate Preparation

Bridge Engineering

Service website

Full-service engineering solutions for vehicular, railroad, and pedestrian bridges, including routine evaluations, upgrades, and construction phase support.

  • Vehicular and Pedestrian Bridge Inspections
  • Bridge Load Ratings and Evaluations
  • Bridge Structural Rehabilitation
  • Seismic Bridge Retrofitting
  • New Bridge Structure Engineering
  • Construction Engineering Support
  • Marine and Transit Structure Design

Industrial Structures

Service website

Specialized engineering and design services for manufacturing plants and industrial process facilities, with a strong focus on cost-effective constructibility.

  • Industrial Facility Structural Engineering
  • Manufacturing Plant Design Support

Contractor Designs

Service website

Constructible, high-performance structural designs engineered to help contractors overcome unexpected field conditions without sacrificing project safety or timeline constraints.

  • Field-Condition Adaptation Solutions
  • Temporary Structural Support Systems

Connection Design

Service website

Technical structural steel connection design calculations prepared in strict accordance with standard AISC Steel Construction Manual guidelines.

  • AISC Steel Connection Calculations
  • ASD and LRFD Design Application

Unique Structures

Service website

Custom engineering services for non-standard, architecturally complex, or highly specialized structures that require creative structural analysis.

  • Specialty Architectural Feature Engineering
  • Non-Standard Structure Design

Structural Inspection and Assessment

Service website

Detailed evaluations, safety inspections, and forensic engineering analysis for existing buildings, bridges, and infrastructure systems.

  • Building Condition and Structural Surveys
  • Bridge Safety and Structural Inspections
  • Cooling Tower Structural Assessments

Industries

Commercial · Industrial · Government · Bridges · Highways & Roads · Transportation · Parks & Open Space · Sports & Recreation

Projects

Powder Magazine Building Emergency Response

St. Louis County, MO · Parks & Open Space · Client: St. Louis County Department of Parks and Recreation

Project details

Emergency structural analysis, design solutions, and temporary bracing and falsework design to preserve a failing 1860s brick vaulted ceiling.