Civil & Structure
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Civil & Structure
Detailed Summary of Work Done by the Civil & Structural Department in the Oil & Gas Industry
Overview
- The Civil & Structural Department is responsible for the planning, design, analysis, construction support, inspection, and maintenance of all civil works and structural systems in oil and gas facilities.
- The department ensures that equipment, buildings, pipelines, and infrastructure are supported by safe, durable, and code-compliant foundations and structures capable of withstanding operational and environmental loads.
- The Civil & Structural Department supports projects throughout the entire lifecycle, including Conceptual Design, FEED, Detailed Engineering, Procurement Support, Construction, Commissioning, Operation, and Brownfield Modifications.
1. Civil Engineering Design
Civil engineers develop the overall civil engineering design for the project.
Key Activities
- Prepare Civil Design Basis
- Develop Civil Design Criteria
- Site development planning
- Infrastructure design
- Utility corridor planning
- Construction methodology review
- Earthwork planning
- Drainage design
2. Site Development and Master Planning
Civil engineers prepare the site layout considering safety, operations, and future expansion.
Responsibilities
- Site grading
- Plot plan coordination
- Road network planning
- Equipment access roads
- Laydown areas
- Parking areas
- Drainage layout
- Future expansion provisions
3. Topographical and Land Surveys
Coordinate and review survey activities including:
- Topographical surveys
- Boundary surveys
- GPS surveys
- Elevation mapping
- Utility mapping
- Existing facility surveys
Deliverables
- Survey reports
- Topographical maps
- Existing condition drawings
4. Geotechnical Engineering
Civil engineers review geotechnical investigations to determine soil properties.
Activities
- Soil investigation
- Borehole analysis
- Standard Penetration Test (SPT)
- Plate load test
- Groundwater assessment
- Soil bearing capacity evaluation
- Settlement analysis
Deliverables
- Geotechnical Investigation Report
- Foundation recommendations
5. Earthwork Engineering
Planning and design include:
- Site clearing
- Excavation
- Backfilling
- Compaction
- Embankments
- Cut and fill calculations
- Soil stabilization
6. Foundation Engineering
Civil engineers design foundations for all major equipment.
Types of Foundations
- Isolated footings
- Combined footings
- Raft foundations
- Pile foundations
- Mat foundations
- Pedestals
- Machine foundations
- Pipe rack foundations
Design Considerations
- Static loads
- Dynamic loads
- Wind loads
- Seismic loads
- Equipment vibration
- Differential settlement
7. Structural Steel Design
Structural engineers design steel structures supporting process equipment.
Structures Include
- Pipe racks
- Equipment structures
- Compressor structures
- Pump structures
- Platforms
- Walkways
- Stairways
- Pipe supports
- Access ladders
- Flare towers
- Cable tray supports
Design Activities
- Member sizing
- Connection design
- Deflection checks
- Stability analysis
- Buckling analysis
8. Concrete Structure Design
Design of reinforced concrete structures such as:
- Equipment foundations
- Buildings
- Control rooms
- Pipe supports
- Cable trenches
- Utility structures
- Underground pits
- Retaining walls
- Drainage structures
9. Pipe Rack Engineering
Pipe racks support process piping, cable trays, and utility lines.
Responsibilities
- Pipe rack layout
- Column design
- Beam design
- Expansion provisions
- Anchor support design
- Seismic bracing
- Fireproofing requirements
10. Building Engineering
Design of industrial buildings including:
- Control rooms
- Electrical substations
- Analyzer shelters
- Warehouses
- Workshops
- Administration buildings
- Maintenance buildings
- Security buildings
Activities
- Architectural coordination
- Structural framing
- Foundation design
- Roof design
- Fire resistance requirements
11. Underground Structures
Design includes:
- Cable trenches
- Utility tunnels
- Manholes
- Valve pits
- Drainage pits
- Sumps
- Underground tanks
- Culverts
12. Road and Pavement Design
Civil engineers design:
- Internal roads
- Heavy equipment access roads
- Fire access roads
- Parking areas
- Crane pads
- Hardstands
Design Considerations
- Traffic loading
- Pavement thickness
- Drainage
- Turning radius
- Heavy transport routes
13. Drainage System Design
Design of:
- Stormwater drainage
- Oily water drainage
- Clean water drainage
- Closed drain systems
- Open drains
- Catch basins
- Oil-water separators
Objectives
- Prevent flooding
- Protect equipment
- Control contaminated runoff
14. Structural Analysis
Engineers perform structural analysis considering:
- Dead loads
- Live loads
- Wind loads
- Earthquake loads
- Equipment loads
- Thermal loads
- Blast loads
- Snow loads (where applicable)
Software
- STAAD.Pro
- SAP2000
- ETABS
- SACS (Offshore)
- ANSYS
15. Dynamic Analysis
Required for rotating equipment foundations.
Includes
- Natural frequency analysis
- Vibration analysis
- Harmonic response
- Dynamic amplification
- Resonance checks
Applications
- Compressors
- Pumps
- Gas turbines
- Steam turbines
- Generators
16. Blast and Fire Resistant Design
Critical structures are designed for:
- Blast resistance
- Fire resistance
- Progressive collapse prevention
- Explosion loading
Applicable For
- Control rooms
- Electrical substations
- Safety shelters
17. Structural Integrity Assessment
Responsibilities
- Structural inspection
- Corrosion assessment
- Crack inspection
- Deflection monitoring
- Remaining life assessment
- Fitness-for-service evaluation
18. Structural Rehabilitation
Activities Include
- Steel strengthening
- Concrete repair
- Jacketing
- Grouting
- Foundation repair
- Corrosion protection
- Structural retrofitting
19. Material Selection
Structural Steel
- ASTM A36
- ASTM A572
- ASTM A992
Reinforcing Steel
- High-yield deformed bars
Concrete
- Normal strength concrete
- High-strength concrete
- Sulfate-resistant concrete
20. Vendor Document Review
Civil & Structural engineers review:
- Equipment foundation loads
- Anchor bolt plans
- Baseplate drawings
- Steel fabrication drawings
- Vendor GA drawings
- Dynamic load information
21. Procurement Support
Activities
- Prepare material requisitions
- Technical bid evaluations
- Vendor clarifications
- Steel quantity estimates
- Concrete quantity estimates
22. Construction Support
Responsibilities Include
- Foundation setting-out verification
- Excavation inspection
- Reinforcement inspection
- Formwork inspection
- Concrete pouring supervision
- Anchor bolt installation
- Structural steel erection support
23. Inspection and Quality Control
Inspection Activities
- Soil compaction tests
- Concrete cube tests
- Rebar inspection
- Structural steel inspection
- Welding inspection
- Bolt torque verification
- Dimensional checks
- Coating inspection
24. Commissioning Support
Support Includes
- Foundation settlement monitoring
- Structural alignment verification
- Equipment grouting inspection
- Final structural inspection
- Punch list clearance
25. Brownfield and Revamp Projects
Responsibilities
- Existing structure assessment
- Foundation capacity verification
- Equipment relocation studies
- Additional load analysis
- Structural modifications
- Retrofit design
26. Typical Engineering Deliverables
Civil Deliverables
- Civil Design Basis
- Civil Design Criteria
- Site Development Plan
- Plot Plan
- Grading Plan
- Earthwork Drawings
- Drainage Layouts
- Road Layouts
- Underground Utility Drawings
- Foundation Layouts
- Excavation Drawings
Structural Deliverables
- Structural Design Basis
- Structural Analysis Reports
- Foundation Calculation Reports
- Structural Calculation Reports
- Foundation Drawings
- Structural GA Drawings
- Steel Fabrication Drawings
- Reinforcement Drawings
- Anchor Bolt Layouts
- Concrete Schedules
- Steel Material Take-Off (MTO)
- Bill of Quantities (BOQ)
- Construction Specifications
- Inspection Test Plans (ITPs)
- As-Built Drawings
27. Major Standards and Codes
The Civil & Structural Department follows international standards, including:
Civil
- ACI 318 – Structural Concrete
- ACI 351 – Foundations for Machinery
- ASTM Standards – Construction Materials
- AASHTO – Road and Pavement Design
- IS 456 – Plain and Reinforced Concrete (where applicable)
Structural Steel
- AISC Steel Construction Manual
- ASCE 7 – Minimum Design Loads
- AWS D1.1 – Structural Welding
- Eurocode 3 (where applicable)
Oil & Gas Specific
- API RP 2A – Offshore Structures
- API RP 650 – Tank Foundations
- API RP 752 – Blast Resistant Buildings
- API RP 753 – Portable Buildings
- ISO 19902 – Offshore Fixed Steel Structures
28. Coordination with Other Engineering Disciplines
The Civil & Structural Department works closely with:
- Process Engineering: Plot plans, equipment locations, drainage, and process unit layouts.
- Mechanical Engineering: Equipment loads, machine foundations, vibration analysis, and support structures.
- Piping Engineering: Pipe racks, pipe supports, anchor points, and equipment access.
- Electrical Engineering: Substations, cable trenches, transformer foundations, and electrical buildings.
- Instrumentation & Control: Control rooms, analyzer shelters, instrument supports, and cable routing.
- Safety Engineering: Fireproofing, blast-resistant buildings, emergency access, and evacuation routes.
- Geotechnical Engineering: Soil investigations, foundation recommendations, and settlement analysis.
- Construction: Sequencing, temporary works, quality control, and site supervision.
- Operations & Maintenance: Equipment access, maintenance platforms, lifting areas, and future modifications.
Typical Civil & Structural Engineering Workflow
- Review site surveys and geotechnical investigation reports.
- Develop the Civil and Structural Design Basis.
- Prepare the plot plan, grading plan, and infrastructure layout.
- Design foundations, buildings, pipe racks, roads, drainage, and underground structures.
- Perform structural analysis for static, dynamic, wind, seismic, and blast loads.
- Prepare drawings, calculations, material take-offs, and technical specifications.
- Support procurement and review vendor foundation and structural load data.
- Supervise construction, inspections, and quality control.
- Support commissioning through alignment checks, settlement monitoring, and final inspections.
- Provide ongoing support for maintenance, integrity assessments, brownfield modifications, and plant expansions.