Let’s discuss the standards for applying BIM models to construction safety and the essential content that needs to be included. The BIM model plays a crucial role in fall prevention safety inspections for construction openings. The required BIM model is created during the construction preparation phase, after the detailed design is finalized. To effectively support construction safety inspections at this stage, the BIM model must comply with the following three regulatory requirements:
（1） Development Accuracy (LOD) Requirements of BIM Models Must Align with Construction Planning Needs
At the general design completion stage, BIM models are typically developed to LOD300, indicating precise information such as quantity, size, shape, position, and orientation after construction completion. However, during the construction planning phase, the BIM model is prepared by the contractor based on construction requirements, so its accuracy level can reach LOD400. This means that model components should include precise details about quantity, size, shape, position, direction, and all information necessary for complete manufacturing, assembly, and detailed construction.
（2） The BIM Model Must Correspond with the Construction Plan to Accurately Represent Temporary Openings
Construction openings refer to gaps created during the building process and generally fall into three categories:
- Permanent openings present in the finished building, such as stairwells and shafts;
- Temporary openings resulting from incomplete permanent structures, like window openings;
- Temporary openings created to facilitate construction activities, such as intermediate piles used for underground support.
Therefore, when establishing the BIM model for construction, it should be based on the building’s construction progress (as reflected in tools like MSP Project or a network diagram) to include all three types of openings. This means the BIM model used for fall prevention inspections is not a static detailed design model but a dynamic model that evolves with the construction schedule.
For example, if the model is “frozen” at a specific point in the construction timeline according to the plan, the three types of openings shown in the figure to the right can be identified. Once construction is complete, these openings will be enclosed by structural components, removing any fall hazards. However, during construction, openings that pose a fall risk must be properly safeguarded.
（3） The Construction Schedule Network Diagram Must Be Integrated with BIM Model Components
As mentioned above, the BIM model for fall prevention inspections is time-sensitive. Its temporal aspect must be coordinated through scheduling software such as MS Project or Primavera P3. Each work item in the project schedule network diagram must correspond directly to specific construction components within the BIM model. The work breakdown structure of the schedule must align with the BIM components or their groups to ensure consistency and accuracy.
That wraps up our discussion on the standards for using BIM models in construction safety and the necessary content to include. I hope this article has been helpful to everyone!
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