SDR Engineering Consultants, Inc.

Delivers tailored engineering solutions for diverse physical infrastructure, incorporating innovative and cost-focused methodologies that align with current design criteria.

• Bridge Design

  Focuses on the engineering and detailing of conventional and complex bridge structures, including cast-in-place and precast concrete segmental box bridges as well as continuous-span structural steel plate and box girder designs.

• Construction Engineering Support

  Provides essential oversight and technical assistance during the building phase, including quality control, quality assurance, product verification, condition assessments, and drafting of detailed shop drawings.

• Complex Bridge Analysis

  Analyzes and designs complex bridge structures, utilizing specialized techniques for truss, segmental, and arch bridges.

Provides comprehensive assessment and rehabilitation strategies for aging infrastructure, balancing safety demands and budgetary constraints through detailed reporting and planning.

• Structural Inspection

  Conducts hands-on, in-depth structural inspections and damage assessments of concrete, steel, truss, cable-stayed, and segmental bridges.

• Load Rating

  Determines the safe carrying capacity of structures through advanced numerical modeling, fatigue analysis, and service life assessment.

• Infrastructure Rehabilitation

  Implements repair and strengthening designs using both traditional methods and advanced composite materials such as fiber reinforced polymers.

Evaluates the actual in-situ behavior and safe load capacity of bridges using diagnostic and proof testing techniques combined with calibrated finite element models.

• Fiber Optic Instrumentation

  Utilizes fiber optic strain gauges unaffected by electrical interference to measure precise structural tension and compression.

• Vibrating Wire Instrumentation

  Measures frequency changes in tensioned wires under electrical pulses to calculate structural strain.

• Foil Strain Gauges

  Bonds specialized foil sensors to member surfaces to detect shifts in electrical resistance caused by loading.

• Displacement Measurement

  Converts mechanical motions and vibrations into electrical signals using linear variable differential transformers to determine structural displacement.

Assesses structural integrity, material properties, and subsurface conditions without causing physical damage, particularly when plans are unavailable or visual access is restricted.

• Ground Penetrating Radar

  Employs high-frequency radio waves to map embedments, locate reinforcement, and identify internal voids or corrosion in concrete.

• Chloride Ion Penetration Testing

  Analyzes concrete core or powder samples to model degradation progression and identify deterioration causes.

• Ultrasonic Testing

  Uses high-frequency sound waves to detect internal flaws, cracks, and inclusions in structural members.

• Radiographic Testing

  Generates subsurface images using gamma rays or X-rays to locate hidden defects and measure material thickness.

• Infrared Thermography

  Detects subsurface delaminations, voids, and debonding by measuring surface temperature variations.

Deploys rapid response assessment and structural restoration designs for bridges and infrastructure damaged by vehicular impacts or fire.

• Composite Material Repair

  Applies carbon fiber reinforced polymers with ultraviolet-protective coatings to restore strength to damaged concrete members.

• Prestressing Strand Splicing

  Splices ruptured prestressing strands to restore the integrity and capacity of prestressed concrete.

• Steel Heat Straightening

  Provides technical detailing and oversight for the thermal straightening of deformed steel structural members.

• Heavy Transport and Jacking

  Implements self-propelled modular transportation and structural jacking to facilitate support repair or replacement.

Conducts original academic and practical engineering research to formulate technical specifications, design standards, and state-level bridge manuals.

• Finite Element Analysis

  Employs two-dimensional grillage models and three-dimensional shell models to run parametric studies and investigate design alternatives.

• Soil-Structure Interaction

  Simulates the complex coupled behaviors of structural elements and their underlying flexible soils under dynamic or static loading.