Structural engineering requires more than designing a safe, efficient structural system. Design must also integrate architectural requirements, MEP systems, construction methods, project schedules, and documentation standards.
This is where BIM structural engineering becomes increasingly valuable.
Building Information Modeling (BIM) provides a structured digital environment to develop, coordinate, review, and deliver structural geometry and information throughout a project’s lifecycle.
However, BIM does not replace structural analysis or engineering judgment. Its value lies in connecting engineering decisions with multidisciplinary coordination and project delivery.
For structural engineers and AEC firms, understanding where BIM fits within the design process is essential to using it effectively.
What Is Structural Design?
Structural design is the engineering process of developing a structural system that safely resists applicable loads while meeting requirements for strength, stability, serviceability, constructability, and applicable building codes.
This typically includes:
- Selecting the structural system
- Establishing structural grids
- Designing beams, columns, slabs, and walls
- Performing gravity and lateral load analysis
- Designing foundations and connections
- Coordinating structural requirements with architectural and MEP systems
BIM does not replace these activities. Instead, it provides a coordinated digital framework to represent and manage their outcomes. The structural model can therefore develop alongside the engineering process rather than being created only after design decisions have been finalized.
Where Does Structural Design Fit Into the BIM Design Process?
Structural design connects architectural intent, engineering requirements, and construction feasibility. In a BIM-enabled project, it is not an isolated phase completed before modeling begins. Instead, the structural model develops progressively alongside engineering analysis, multidisciplinary coordination, and design refinement.
The process typically follows:
Architectural concept → Structural concept → Analysis and design → BIM model development → Multidisciplinary coordination → Design refinement → Construction documentation
1. Establishing the Structural Concept
The structural engineer evaluates the building’s geometry, use, site conditions, anticipated loads, architectural requirements, and applicable codes to determine an appropriate structural system.
This may involve selecting a steel, reinforced concrete, timber, composite, or hybrid system and establishing preliminary grids, spans, framing arrangements, lateral systems, and foundation concepts.
At this stage, BIM can provide an early representation of the proposed building structure design, allowing the structural concept to be evaluated alongside the architectural layout before detailed development begins.
2. Performing Structural Analysis and Design
The team then evaluates the preliminary structural system through engineering calculations and structural analysis. The team considers gravity, wind, seismic, and other applicable loads based on project requirements and governing codes.
The team then refines member sizes, connections, reinforcement, foundations, and other structural components.
The analytical model evaluates structural performance, while the BIM model represents the physical structure and its relationship with other building systems.
3. Developing and Coordinating the BIM Model
Once the structural system is sufficiently developed, model beams, columns, slabs, walls, foundations, openings, and other components with appropriate geometry and information.
The structural model can then be coordinated with architectural models and MEP models. This allows teams to identify potential conflicts in three dimensions.
For example, a structurally adequate beam may interfere with a mechanical duct or reduce required ceiling clearance. BIM helps identify and address these conflicts before they become construction issues.
4. Refining the Design for Construction
Structural design continues to evolve during coordination. The model may reveal conditions requiring changes to beam depths, column locations, openings, or provisions for equipment and MEP systems.
This creates a feedback loop between engineering, coordination, and constructability, allowing teams to refine design decisions before construction.
5. Developing Construction Information
Once the structural design is coordinated and approved, the model can support drawings, schedules, details, and other project deliverables.
The required level of information depends on the project’s stage and intended use. That is why BIM LOD matters. A conceptual model does not require the same information as a construction coordination model.
For projects requiring detailed multidisciplinary coordination, LOD 350 can provide the interface information needed to coordinate structural elements with adjacent building components.
How Does BIM Support 3D Structural Design?
3D structural design lets engineers evaluate the structure in the context of the complete building. A coordinated BIM model can identify beam and duct conflicts, MEP penetrations, column alignment issues, structural openings, foundation interfaces, and clearance requirements before construction.
A buildingSMART International survey of 250 industry respondents found that 71% identified better decision-making and improved quality as key BIM benefits, while 70% cited improved or faster collaboration.
For structural teams, BIM provides a shared environment to coordinate design intent, communicate changes, and refine interfaces across disciplines.
BIM therefore provides the environment to coordinate, document, and progressively refine structural design.
What Role Does a Revit Structural Model Play?
A Revit structural model digitally represents the physical structural system, including beams, columns, slabs, walls, foundations, and openings. It supports coordination, visualization, documentation, and information management.
However, the physical BIM model should not be confused with the analytical model used for structural calculations.
The analytical model evaluates structural behavior, while the BIM model represents the physical structure and its relationship with other building systems. BIM therefore supports structural engineering rather than replacing engineering calculations or professional judgment.
How Does LOD in BIM Affect Structural Modeling?
More detail does not necessarily mean a better model. LOD in BIM defines the development and reliability of model elements for specific project uses.
According to the BIMForum Level of Development Specification, LOD 350 provides information about the interfaces between 3D model elements and adjacent or dependent building components, making it particularly useful for construction-level coordination.
For structural projects, this can help coordinate beams, columns, slabs, and other elements with architectural and MEP systems. However, you don’t need to apply the same LOD to every component. Base requirements on the project’s scope, intended model uses, contractual requirements, and delivery stage.
How Does BIM Support Construction Documentation?
Once the structural design has been coordinated, the BIM model can support structural plans, sections, details, schedules, and other project deliverables.
Because these outputs can be connected to model information, design changes can be reflected across relevant views and schedules, subject to appropriate engineering review. This improves consistency and reduces unnecessary duplication.
Can Structural BIM Continue Into Construction?
Structural BIM can extend beyond design and documentation into construction coordination, fabrication workflows, quantity-related activities, and as-built documentation.
At handover, appropriately developed model information can also contribute to the owner’s digital building record and support future renovation or facility management.
How Next Synergy Supports Structural BIM?
At Next Synergy Solutions, we approach structural BIM as part of the broader project delivery process, not as standalone 3D modeling.
The workflow can include structural modeling, multidisciplinary coordination, clash detection, LOD development, and project-specific BIM deliverables. The objective is to create reliable models that represent structural intent while supporting coordination, documentation, construction, and downstream requirements.
Conclusion
BIM has become an important part of structural engineering because it connects structural design with multidisciplinary coordination and construction information.
Its value extends beyond creating a 3D model. When implemented correctly, BIM helps teams identify conflicts earlier, communicate design intent more effectively, and develop coordinated project documentation.
For structural engineering teams, effective BIM structural engineering means delivering the right information at the appropriate level of development and project stage.
Frequently Asked Questions
1. What is BIM structural engineering?
It is a model-based approach that integrates structural geometry and information with design coordination, documentation, construction, and project delivery
2. How does a Revit structural model support structural design?
It represents structural elements within a coordinated building environment and supports visualization, multidisciplinary coordination, documentation, and information management.
3. What does LOD 350 mean in BIM?
LOD 350 provides sufficient element and interface information to support construction-level coordination with adjacent building components.
4. Does BIM replace structural analysis?
No. Structural analysis evaluates structural performance, while BIM represents, coordinates, documents, and manages the resulting design information.
5. When should BIM be introduced?
BIM can begin during conceptual or schematic design and progressively develop through coordination, documentation, construction, and handover.
