In the previous issue of BIM Draws Inspiration from Taiwan, I introduced Taiwan’s approach to the Content of Bidding Documents for BIM Technology Service Procurement. This article delves deeper into Taiwan’s practices concerning the content of engineering procurement bidding documents based on BIM technology.
1. Supplementary Construction Instructions: Construction contractors are required to develop a BIM building information model using the design drawings and BIM construction specifications (3D) provided by the project department. Additionally, the BIM model created during the planning and design phase serves as a valuable reference for construction companies throughout subsequent development stages.
2. Delayed BIM Performance in Engineering Contracts: Contractors must complete all BIM-related tasks as outlined in the contract and submit deliverables within the BIM Project Milestone Period (BMP). If deliverables are not submitted or improved on time, a penalty of 5% of the original BIM project price per day will be imposed for each day overdue, up to a maximum of the total BIM project price.
3. Application of BIM Construction Standards During the Construction Phase (Example: Separate bidding for building, electrical and plumbing, and air conditioning):
(1) Technical Specification Definition: The Level of Detail (LOD) for BIM models submitted by contractors is classified into six levels: LOD 100, 200, 300, 350, 400, and 500.
(2) BIM Model Requirements During Construction: Contractors must produce BIM models at LOD 200 and 300 levels. Specifically, LOD 200 applies to structural and door/window engineering, while LOD 300 is required for exterior walls, interior decoration, mechanical, electrical, plumbing (MEP), and air conditioning engineering.
(3) Delivery Process: BIM model development begins with the building and structural models provided by the general contractor. These are then handed over to the electrical, plumbing, and air conditioning contractors for detailed drawing production. If any discrepancies or issues arise during BIM modeling, contractors must promptly notify the general contractor, supervising party, and client (Party A). The supervising party and client will coordinate meetings to resolve these matters.
The BIM construction phase demands close collaboration. This includes adding construction details to the BIM model, generating engineering work items and schedules, and incorporating animated model representations. As construction progresses, the BIM model must be continuously updated and corrected, eventually integrating into the completion data to form the BIM as-built model.
During construction, an information management platform is established to handle design clarifications (RFIs), design changes, and facilitate communication among the supervising party, agencies, and stakeholders, integrating all engineering-related processes.
BIM Building Plan (BMP) and Execution Content: Within 45 calendar days of contract award, the contractor must submit a BIM model development and management plan. This plan allows the supervising contractor and client to understand the BIM schedule and coordination management. It should outline the construction team’s BIM usage strategy, collaborative workflows, and timelines.
4D Construction Planning and Project Scheduling: The BIM schedule must align with actual construction progress and be regularly updated. BIM models should integrate with the schedule to identify interface conflicts and conduct model-based simulations before the construction of work items begins.
The BIM model construction schedule must not lag behind physical construction. For example, BIM modeling from the basement up to the second-floor slab must be completed by the basic version milestone. All remaining BIM models should complete 3D clash detection across disciplines (building, structure, MEP, and air conditioning) at least two weeks before the corresponding construction phase. If BIM model delays prevent timely clash detection, contractors cannot claim extensions or postpone the construction schedule.
BIM Model Delivery: Contractors, including those in structural engineering, must assign qualified personnel with BIM expertise to coordinate with MEP and air conditioning contractors. These individuals are responsible for establishing the BIM model and performing coordinated clash detection and impact analysis before construction begins.
Collision Analysis Report: Clash detection results are presented in tabular format and dynamically linked to graphical collision locations and documentation on a web-based platform accessible to the supervising party and client.
Model Design Changes: After submitting collision analysis reports, contractors must update the BIM model according to actual coordination outcomes and provide revised models and reports to the client.
3D BIM Model Deliverables: Upon project completion and integration, contractors must deliver a results CD containing BIM models accessible by the client without requiring additional software purchases. Deliverables should include basic project information (creator, designer, builder, project cost, timeline, and other relevant details) and an indexed directory organized by project architecture to facilitate model navigation.
Communication and coordination files should be compatible with free BIM viewing software. Completion models must cover all major systems, including building structure, MEP, and air conditioning, along with comprehensive 3D visualizations and perspectives.
Training and Knowledge Transfer: Contractors must provide model handover instructions, training, and file management through at least five training sessions, each lasting no less than four hours. The number of participants depends on the client’s needs. The training plan should be included in the BIM construction plan submission.
All software tools used must be properly licensed and authorized to avoid intellectual property infringement. To facilitate performance review, contractors are also responsible for providing BIM-related software (covering building, structural, MEP, and air conditioning disciplines) and assisting with software setup, maintenance, and updates until project acceptance.
(4) Payment for BIM Services: Payment equals 100% of the BIM contract price and is disbursed in installments based on BIM model construction progress. Payment applications are submitted by the building, MEP, and air conditioning contractors, approved by the supervising party, and recorded by the client.
In summary, Taiwan’s engineering procurement bidding documents based on BIM technology demonstrate clear and detailed standards, especially regarding technical specifications and procedural regulations. These standards are more comprehensive than those commonly found in mainland China. By learning from Taiwan’s BIM standards and adapting them to mainland China’s context, we can accelerate effective BIM implementation.
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