Bridge Design & Structural Engineering

• We design durable and constructible bridge structures for a wide range of applications, including:

• Road and rail bridges (single-span and multi-span)

• Pedestrian and service bridges

• Box girder, T-beam, and portal frame structures

• Modular steel and precast concrete bridges

• Temporary construction bridges and detour crossings

• All designs consider load ratings, seismic and wind loading, scour and erosion potential, and long-term durability.

Major Culverts & Drainage Crossings

• We engineer high-capacity drainage structures for flood-prone and hydrologically sensitive areas, including:

• Reinforced concrete box culverts

• Multi-cell and arch culverts

• Pipe culverts with headwalls and wingwalls

• Low-level causeways and drifts

• Precast or cast-in-situ culvert solutions

• Designs are tailored to match hydraulic modelling outputs, flow velocities, debris loading, and maintenance accessibility.

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Foundation & Abutment Design

• We design high-performance foundations and abutments that accommodate ground variability and hydraulic forces, including:

• Reinforced spread footings

• Deep pile and caisson foundations

• Scour protection measures (gabions, riprap, concrete aprons)

• All foundation designs are informed by geotechnical data and constructed with durability and site access in mind.

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Hydraulic & Flood Design Integration

• Bridges and culverts are designed in close coordination with hydrological and hydraulic engineers to ensure:

• Flood resilience and overtopping control

• Compliance with storm recurrence interval (SRI) and return period requirements

• Sediment and debris management

• Alignment with natural flow paths and ecological considerations

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Regulatory Compliance & Approvals

• We prepare and submit detailed engineering documentation required for authority approvals, including:

• Bridge and culvert design reports

• Hydraulic analysis and flood modelling summaries

• TMH 7 and SANS compliant drawings and specifications

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Construction Support & Site Inspections

• We provide technical support during construction, including:

• Review of contractor method statements

• Site inspections at critical stages

• Quality assurance and compliance checks

• Engineering sign-offs and completion certificates

• Our involvement helps ensure smooth delivery, safety, and adherence to design intent.

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Coto Certified Inspections

• We inspect bridges, major culverts, lessor culverts, retaining walls and gantries according to TMH standards and upload to ITIS and or Struman platforms.

• COTO certified bridge inspector

• COTO certified major culvert inspector

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