BIM (Building Information Modeling) is increasingly being adopted in the design and construction of infrastructure projects, playing a critical role throughout their lifecycle. While my understanding of BIM systems is not exhaustive, I would like to share some practical ideas from the perspectives of property management and equipment operation, aiming to extend BIM’s utility beyond construction into ongoing project management.
1. The Dynamics of BIM
Bringing BA into BIM to make it truly dynamic
For BIM to be effective in operations and maintenance, it needs to be dynamic rather than just a static 3D model. Incorporating live data into BIM transforms it into a powerful tool for real-time management.
1. Building-wide Air Conditioning Management
In large, complex buildings, continuous monitoring of the air conditioning system is essential. BIM models provide an intuitive platform to analyze air conditioning operation strategies, airflow, water flow, and energy distribution in an integrated manner.
This is especially valuable in projects with VAV (Variable Air Volume) systems or computer centers with multiple cooling sources.
For example, the operational status of refrigeration units can be easily monitored, including dozens of parameters such as unit types, quantity, plate exchanger counts, output water temperature, AHU air volume and temperatures, supply air temperature and humidity, room temperature, and humidity uniformity. This comprehensive visibility facilitates the optimization of operational strategies and energy conservation.
Moreover, the start and stop status of water pumps, valve opening degrees, and water temperature and flow in pipelines can be intuitively monitored in real time.
2. Intelligent Lighting
Many modern projects feature intelligent lighting systems. BIM models can support on-site management, particularly for replicating lighting effects in lobbies, atriums, nightscapes, and courtyards. This provides property staff with clear and convenient control options.
3. Software and Hardware Requirements for Dynamic BIM
To implement dynamic BIM effectively:
- All critical monitoring data collected by Building Automation (BA) systems must be integrated into the BIM model. This requires software providers to ensure data interface availability during procurement of weak current control systems, enabling seamless data integration.
- QR codes and RFID cards should be configured for asset tracking and identification (details discussed later).
- Mobile tablets and other handheld devices should be supported for easy access to BIM data on site.
2. Engineering Emergency Response
1. Emergency Water Leak Management
In a project we managed, a municipal water supply pipeline rupture caused water to infiltrate lower building floors through inadequately sealed pipes. Despite water leakage alarms in some rooms, high flow rates led to water spreading underground via pipelines, cable trays, and non-waterproof floors. Although CAD drawings existed, the complex underground structure and unclear vertical relationships made inspection labor-intensive.
If water leakage alarms were integrated with the BIM model, submerged areas could be visualized in both 2D and 3D on large screens, enabling quicker response planning and loss mitigation.
2. Valve Location Display
While standard floor water pipes and valves follow clear installation rules, areas like lobbies and atriums often have valves installed opportunistically during construction. For instance, an air curtain pipe at a project entrance burst due to extreme cold, and the valve was eventually found only after extensive searching in a corner on the second floor. Having BIM models that visually display valve locations would greatly expedite emergency handling.
3. Household Pipeline Acceptance
Large municipal projects have numerous utility interfaces—electricity, fiber optics, potable water, reclaimed water, heating, gas, etc. Poor sealing or inadequate acceptance processes can lead to water intrusion during municipal water bursts or heavy rainfall. BIM models enable precise location and acceptance of underground utility entries, facilitating sealing and quality checks to reduce such risks.
3. Enhancing Fire Emergency Response
BIM offers significant advantages in fire emergency scenarios.
1. Fire Elevators
Current regulations prohibit the use of standard and fire elevators for fire evacuation—fire elevators are reserved exclusively for firefighters. However, with BIM’s dynamic functionality, elevators could play a vital role in fire rescues, especially in super high-rise buildings.
Key requirements include:
- Elevator machine rooms and cars must have fire prevention features and dual (or multiple) power sources, such as flame-retardant cables, diesel generators, or UPS systems.
- Reliable elevator monitoring systems, including audio, video, and data signals, as well as smoke and temperature sensors in the machine room.
- Smoke detectors and video cameras installed in elevator lobbies and adjacent rooms.
- Robust wireless or dedicated intercom systems for emergency communication.
- Large display screens in command centers for real-time visualization.
- Comprehensive building-wide broadcasting systems.
- Linkage software connecting elevator operations, environmental conditions, and BIM data.
During a fire, command personnel can monitor elevator status and fire spread on large screens, directing firefighters to operate elevators to evacuate occupants to refuge floors or the ground level safely. Elevators’ availability status can be fully visualized in the BIM interface, aiding decision-making. This approach is under feasibility study with fire departments.
2. Evacuation Guidance
When elevator evacuation is unavailable, BIM models still provide crucial assistance. Using sensors (including rolling shutter door sensors) and reliable communication systems, personnel can be guided to evacuate safely via stairs, significantly improving fire rescue operations.
3. Evacuation Preparation
In large office environments, 3D evacuation maps can be provided at individual workstations, showing simulated fire sources and the shortest routes to exits via corridors and stairs. Regular training based on these maps prepares occupants for safe evacuation.
4. Security Enhancements
1. Suspicious Individual Identification
Video recognition and tracking systems can identify malicious, illegal, or terrorist individuals. Automated video recognition software can switch camera views to track targets continuously.
During nighttime security operations, combined signals from dual sensors, infrared detectors, access control systems, and door magnets can be displayed on BIM large screens. Imagine monitoring a red dot moving across floors, stairs, and elevators—like a mouse in a cage—never escaping sight.
This system requires deep integration between BIM and multiple software platforms.
2. Pedestrian and Vehicle Flow Monitoring
Video systems can estimate crowd and vehicle density, informing on pedestrian flow (people per square meter) and vehicle traffic in key building areas such as entrances, elevator lobbies, restaurants, exhibition halls, and stairwells. Warnings and alarms trigger when densities exceed safe thresholds (e.g., 5 people/m² for warnings, 7 people/m² for alarms), enabling emergency deployment of backup entrances, additional elevators, and manual traffic control.
3. Security Simulation for VIP Events
Using BIM on large displays, security teams can collaborate to simulate VIP reception plans, including vehicle routes, transfer points, elevator operations, and security checkpoint arrangements. This is highly valuable for large projects, exhibition centers, and major events.
5. Space Management and Guidance Systems
1. Space Management—Booking Conference Rooms and Exhibition Halls
Booking venues for important meetings can be inefficient, especially in centralized conference areas or large exhibition centers with varying layout requirements.
BIM models provide 3D visualizations that allow users to understand venue layout, spatial ambiance, and atmosphere remotely on computers or tablets. Users can simulate and adjust layouts, rearranging tables and chairs to instantly preview changes. This capability greatly improves booking efficiency and is well-suited for reserving exhibition booths as well as office spaces.
2. 3D Guided Display Screens
Smartphone-based indoor navigation is becoming common. We recommend installing multiple 3D guidance display systems in large projects and exhibition parks to assist visitors.
For example, the China Zun building features a double-decker aerial lobby and double-decker elevators. Without clear guidance, reaching the desired floor is challenging. Strategically placed 3D guide signs pointing to elevator routes can significantly improve wayfinding.
3. Regional and Indoor Localization (ULS)
Using enhanced mobile phone antennas, Wi-Fi, VLAN (internal communication) antennas, and other components, positioning systems with 3-5 meter accuracy are common. More precise microwave-based systems can achieve sub-meter accuracy, but 3-5 meters accuracy is generally sufficient for office buildings, parks, and large shopping malls.
People can use smartphone or tablet apps to access spatial information and follow guidance to their destinations, offering great practical value in large property developments, shopping malls, and exhibition centers.
4. Garage Positioning and Vehicle Retrieval
Parking location and vehicle retrieval are critical challenges. We recommend:
- Installing QR codes next to each parking space (on columns or walls). Drivers scan the code with their smartphones to record the parking spot, then use area positioning to find their car later. This method is simple and cost-effective but requires a smartphone.
- Alternatively, camera recognition systems or RFID cards assigned to each vehicle can be used, though the time to collect cards may slow parking in busy garages.
In large garages with existing guidance systems, the positioning and retrieval methods should be kept as simple as possible.
We recommend designing these systems to operate via Wi-Fi or Bluetooth to support smartphone applications.
6. Applications in Property Management
1. Planning for Equipment Repair and Replacement
BIM models make it easier to simulate the transportation routes for large equipment replacements, such as refrigeration units, diesel generators, and boilers. Proper planning for disassembly, sealing, and pipeline relocation over the next 10 to 20 years is crucial.
2. Building Data Statistics Based on BIM
BIM models demand higher accuracy than traditional CAD drawings, providing precise data for property management. This includes accurate counts of materials and spare parts like stone surfaces, carpeting, floor areas, external windows, valves, water pumps, and motors. For large projects—such as the China Zun with 108 floors and 430,000 square meters—this data is invaluable. Integrating BIM data with mature ERP systems can significantly elevate management capabilities.
3. Simulation of Large-scale Cleaning and Maintenance Equipment
BIM can simulate the use of large cleaning equipment, like spider carts and hydraulic lifts, in confined spaces, aiding procurement decisions.
4. BIM-ERP Integration
Property management companies increasingly use ERP systems tailored to their needs. Connecting BIM with ERP platforms extends BIM’s lifecycle and maximizes its operational value. BIM’s vast data and visualization capabilities complement ERP’s statistical and interface functions, accelerating BIM’s maturity. Thus, BIM applications should be designed with ERP interface compatibility in mind from the start.
5. RFID and QR Code Usage
RFID cards and QR codes are becoming popular for labeling mechanical and electrical equipment. We have experimented with RFID tags on VAV boxes, valves, and concealed components, but maintenance and power supply replacement pose challenges. QR codes, attached directly to devices, bases, or nearby concealed equipment (like channel walls), offer a more practical solution.
Scanning a QR code with a smartphone or tablet provides device information and system relationships upstream and downstream. Inspection data can be sent back to the management system via Wi-Fi or cellular networks (3G/4G).
6. Ceiling Removal Function
During renovations involving partition changes, duct relocations, or adding lighting and wiring, ceilings often obstruct visibility. BIM models solve this by allowing users on-site to use tablets to retrieve room drawings and apply “ceiling removal” (transparency) effects. This makes ceilings and even wall decorations temporarily invisible, revealing equipment, pipelines, and wiring behind them, greatly facilitating renovation and maintenance.
7. Personnel Positioning
BIM models can track cleaning, security, and maintenance staff movements during night shifts, recording their trajectories. This monitoring helps deter theft, leaks, and other internal incidents, enhancing security and confidentiality in sensitive areas.
8. BIM-based Training for Operation and Maintenance Staff
BIM models provide an intuitive and accurate overview of mechanical and electrical equipment, pipelines, air ducts, and building layouts. Coupled with dynamic information like pedestrian and vehicle flow and equipment operation data presented through animations, BIM serves as an excellent training tool for technicians, security personnel, and service staff.
7. Conditions and Maintenance for BIM Applications
1. Requirements for BIM Operation and Maintenance Applications
- 2-3 high-performance servers with UPS power supply.
- Agreement and data interface integration between Building Automation (BA) providers (e.g., Honeywell, Johnson Controls, Siemens) and BIM systems to connect monitoring data, including elevator video, audio, and other signals.
- BIM platform software optimized for operation and maintenance management, with possible simplifications for guidance and personnel/vehicle navigation to reduce hardware demands.
- Integration of fire protection information, smoke detectors, temperature sensors, rolling shutters, and other linked systems into BIM.
- Security high-definition cameras capable of animating videos (e.g., fire, crowd density, VIP flow) integrated with BIM based on location.
- Large, high-quality display screens installed in control rooms, emergency command centers, and decision-making halls. We recommend single-bead LED p1.5-p2 screens for superior contrast, brightness, and color accuracy compared to traditional splicing screens.
- Robust emergency broadcasting systems covering buildings and outdoor areas.
- High fire ratings for monitoring rooms, command centers, elevators, cables, and power supplies.
2. Maintenance of BIM Models
Creating BIM models is far more complex than traditional CAD drawings, and integrating applications to achieve meaningful benefits requires ongoing effort.
It is essential to ensure the initial BIM model’s accuracy, particularly in mechanical and electrical equipment positions and specifications. Furthermore, continuous and timely updates during renovations and maintenance are necessary to prevent model drift and distortion over time.
We recommend allocating dedicated funds for BIM model maintenance within large project operation budgets and engaging professional BIM companies under contract to maintain the system effectively.
(Wu Qiang, General Manager of Beijing Zhongji Beishi Property Management Co., Ltd.)
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