Mackin's structural engineers are experienced in providing consulting services for a wide variety of structure types and sizes. We have provided inspection, analysis, and design services for new and rehabilitated structures including bridges, culverts, retaining walls, and sign structures. Our award-winning structural designs have provided our clients with unique project solutions which have received national recognition.

Design - Mackin's structural engineering department excels in the design of highway, rail, and pedestrian structures and magnetic levitation vehicle guideways. Design solutions ranging from conventional to complex have involved numerous superstructure configurations, and all geometric conditions.

Rehabilitation Design - Mackin's structural engineers are adept in performing bridge rehabilitation design for widening for capacity upgrades, alignment improvements, and restoration due to deterioration. These projects have addressed the rehabilitation of various structural components including trusses, decks, piers, abutments, parapets, wingwalls, ramps, substructures, and approaches. For older bridges, our engineers preserve both historic and structural integrity, while increasing load capacity to meet client requirements.

Inspection, Analysis, & Rating - Mackin provides bridge and structure inspection services ranging from cursory, periodic inspections to thorough, in-depth inspections using the latest testing methods. This includes stress and fatigue analysis, completion of structure inventory and appraisal documentation, and preparation of reports offering recommendations for allowable loading and required repairs.

Mackin's Structural Engineering practice involves providing our clients the following services:

• New Bridge Design
• Bridge Replacement Design
• Bridge Rehabilitation Design
• In-Depth Structural Inspection
• Bridge Load Capacity Rating & Analyses
• National Bridge Inspection Standard (NBIS)
• Bridge Safety Inspections
• Retaining Wall Design
• Special Structure Designs

Specific structure design services entail:

• Alternatives Analysis
• Type, Size, & Location Studies
• Hydrologic & Hydraulic Studies
• Preliminary Bridge Design
• Final Bridge Design
• Structure Evaluation
• Structural Consultation
• Structure Cost and Feasibility Analysis
• Design Build Design
• Construction Consultation & Shop Drawing Review
• Construction Bid Package Preparation