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Singapore’s Housing & Development Board (HDB) has consistently pushed the boundaries of innovation in public housing. A key driver in this journey is the adoption of Building Information Modeling (BIM).

BIM is a collaborative process that uses 3D models to centralize all project data. This digital representation of a building provides a comprehensive overview for everyone involved, from architects and engineers to contractors and facility managers. BIM facilitates better communication, reduces errors, and streamlines workflows throughout a building’s lifecycle.

HDB recognizes the immense potential of BIM in creating better homes for Singaporeans. By integrating BIM into its construction methodology, HDB aims to enhance productivity, improve quality, and accelerate project delivery.

The Transformation of HDB Construction Through BIM

A notable initiative in HDB’s productivity push is the Construction Transformation Project, which was created in collaboration with Obayashi Singapore. The CTP piloted advanced construction technologies at the Garden Waterfront I & II @ Tengah Build-To-Order (BTO) project, which had an expected 25% productivity improvement compared to other BTO projects. The project implemented innovations like Virtual Design and Construction (VDC), hybrid precast systems, 3D concrete printing, and AI-guided crane operations to reduce manpower and increase construction safety.

Virtual Design and Real-World Benefits

VDC is changing how HDB projects are designed. It has enabled architects and engineers to create digital models of buildings and visualize designs in detail before construction begins. Virtual mock-ups, in particular, have proven to be more cost-effective than traditional physical mock-ups. They reduce material wastage and speed up the approval process, providing clear visualizations of the final product.

Fabrication Techniques Transforming HDB Construction

One of the key fabrication techniques HDB employs is the hybrid precast system, which incorporates full 3D Prefabricated Prefinished Volumetric Construction (PPVC) components. This advanced method allows entire building modules to be constructed off-site and then assembled on-site, enhancing efficiency and reducing construction time. Another innovative approach is the Beamless Flat Plate System, which eliminates the need for traditional beams, resulting in more spacious and flexible living environments for residents. Together, these techniques have significantly accelerated construction timelines and optimized space utilization in HDB developments.

On-Site Construction Innovations

Beyond design and prefabrication, HDB is also pioneering on-site construction innovations. One notable example is 3D Concrete Printing, which has been piloted in several HDB projects. This technology has helped in the accurate and efficient construction of complex components, reducing reliance on traditional methods and improving overall project efficiency.

Integrated Digital Delivery (IDD) for Streamlined Operations

To further enhance construction processes, HDB has implemented Integrated Digital Delivery (IDD), which integrates various stages of the construction lifecycle, from design to assembly. Digital technologies, such as Autodesk Revit, are employed to track components and ensure that every part of the project is synchronized, reducing delays and errors. This integration is key to ensuring that projects are completed on time and within budget.

Targeted Productivity Gains and Future Projections

With these innovations, HDB is targeting a 25% improvement in construction productivity. The use of BIM and prefabrication has already made substantial contributions to this goal, and HDB continues to explore technologies that can further enhance efficiency. In the future, HDB aims to shorten project delivery times, making public housing more accessible to Singaporeans.

BIM Stages and Deliverables

Recognizing its value, the Building and Construction Authority (BCA) has made the e-submission of architectural and engineering plans using BIM mandatory in Singapore since 2013. As such, HDB has a structured approach to BIM implementation. This is what you need to know about each BIM stage and its deliverables:

1. Design Stage

This stage focuses on developing detailed BIM models that define the building’s architectural, structural, and MEP (Mechanical, Electrical, and Plumbing) systems.

Deliverables:

  • 3D BIM Models: Comprehensive models representing the building’s geometry, spatial relationships, and material specifications.
  • 2D Drawings: These drawings provide detailed information for construction purposes.
  • Schedules: BIM enables the creation of possible schedules for doors, windows, finishes, and other building components.
  • Reports: BIM can generate reports on possible quantities, areas, and other relevant data for cost estimation and planning.

2. Construction Stage

During this stage, BIM is used to coordinate construction activities, detect clashes, and manage resources effectively.

Deliverables:

  • Construction Drawings: Detailed drawings extracted from the BIM model, providing precise information for on-site construction.
  • Shop Drawings: BIM can facilitate the creation of accurate shop drawings for prefabricated components.
  • Coordination Models: These models are used to identify and resolve potential clashes between different building systems.
  • 4D Simulations: BIM can be used to create 4D simulations that visualize the construction sequence and schedule.

3. Operation & Maintenance Stage

Even after construction is complete, BIM data remains valuable for facility management and maintenance.

Deliverables:

  • As-Built BIM Model: This model reflects the final constructed building, incorporating any changes made during construction.
  • Operation & Maintenance Manuals: BIM data can be used to generate comprehensive manuals for building operations and maintenance.
  • Facility Management System Integration: BIM data can be integrated with facility management systems to streamline maintenance tasks and track asset performance.

Core Information & Modeling Strategies

Standardized BIM objects and core information play a crucial role in streamlining the construction process. By ensuring that all stakeholders are using the same standardized models, HDB can improve the clarity and efficiency of its projects. Having these standardized models is particularly important in large-scale projects like HDB estates, where multiple contractors and suppliers are involved.

Ensuring Quality and Coordination Through BIM

Quality assurance is a top priority in BIM projects. HDB has implemented stringent procedures for verifying the accuracy of BIM models, ensuring that all elements of the design are correctly represented. In addition, BIM facilitates coordination among various project stakeholders, reducing the likelihood of errors and reworks. It ensures that all parties are on the same page throughout the project lifecycle.

Why Make the Change?

HDB’s decision to fully integrate BIM into its construction methodology was motivated by several key factors, including the need for faster project delivery, improved collaboration, and enhanced productivity.

Benefit #1 – Faster Permitting

BIM can streamline the permitting process by providing detailed, accurate models that can be easily reviewed by regulatory authorities. As such, it reduces the time required to obtain permits and approvals, allowing projects to begin more quickly.

Benefit #2 – Improved Productivity

BIM has been instrumental in improving productivity across HDB construction projects. The digital models created through BIM are more accurate than traditional 2D drawings, reducing errors and reworks. As a result, projects are completed faster and with fewer resources.

Benefit #3 – Less Reworking

One of the major advantages of BIM is its ability to minimize reworking. By creating detailed models, BIM reduces the chances of errors during construction, which can lead to costly and time-consuming rework.

Benefit #4 – Better Collaboration

BIM enhances collaboration by providing a single source of truth for all project stakeholders. This fosters better communication between architects, engineers, contractors, and suppliers, ensuring that everyone is working toward the same goal.

Benefit #5 – Better Presentations

BIM models are highly detailed and visually appealing, making them ideal for presentations to stakeholders. Whether it’s a government agency or a group of future residents, BIM allows for clear and accurate visualizations of projects, improving stakeholder engagement.

Discover How You Can Use BIM to Your Advantage

As BIM becomes increasingly indispensable in the construction industry, it’s essential for companies and professionals to adopt and master this technology. Tools like Autodesk Revit and Fuzor have transformed how projects are designed, visualized, and managed, enabling seamless collaboration and reducing errors. By staying ahead of the curve, firms can enhance their competitiveness, streamline workflows, and deliver higher-quality outcomes in less time. 

For those looking to gain expertise, BIMAGE offers comprehensive BIM training to help you and your team keep pace with the latest advancements in construction technology. Our training programs are designed to equip professionals with the skills needed to effectively implement BIM across all phases of a project, from design through to construction. 

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