THE NEW ZEALAND BIM HANDBOOK

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In May 2019, the New Zealand BIM Acceleration Committee released the third edition of the BIM Manual for New Zealand [2] as the introduction of changes in 2020 extended to linear infrastructure and ISO 19650 parts 1 and 2. Below I present its most important parts:

The purpose of this handbook remains unchanged: to capture the many benefits of BIM to encourage its use and the creation, maintenance and operation of quality construction assets in New Zealand. BIM adds value to the entire useful life of a building object, from initial design to operation. This paves the way for the application of modern digital technologies in the clearance, design, purchase, construction, handover and operation of assets.

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BIM typically includes information on design, construction, logistics, operation, maintenance, budgets, schedules, and much more, providing a much richer environment than traditional approaches. Information created in one phase can be passed on to the next phase for further development and re-use.

This manual presents the critical inputs from FM / AM suppliers that will ensure that BIM provides the information they need, in a format that they can use.

BIM processes concern the creation and operation of all types of assets, including buildings, industrial facilities and construction infrastructure. While BIM is still evolving, BIM has been used in industrial and civil projects for over 20 years. This handbook was first written with an emphasis on vertical buildings / infrastructure. In this issue, the authors have included the terminology and processes for horizontal infrastructure assets.

The process, workflows, and activities recommended in this manual follow ISO 19650. They are presented in a format that will be routine for users familiar with New Zealand projects.

BIM APPLICATIONS: BIM covers a number of processes or tasks such as project creation and 3D coordination. This manual classifies these tasks according to BIM in the process of creating a common language. The NZ BIM Handbook contains 21 separate uses, taken from the Pennsylvania BIM Execution Planning Guide, though with slight terminology changes to fit the New Zealand context. Some applications are commonly used in projects, while others simply indicate possible future applications of BIM.

MODELS AND FEDERATION: In most cases, each designer or sub-industry will create its own design model. Individual models can be combined or combined to create a complex model. However, when building a federation model, information exchange and file format compliance and interoperability should be documented in the BIM Execution Plan. This will ensure geometry and / or information management in compatible file formats to support file sharing between project members while maintaining a smooth workflow. Models exist in a variety of formats. Federated models are not tied to specific authoring software. Interdisciplinary coordination is confirmed by the federal model. Changes are made to the models of individual disciplines. In large projects, breaking down industry models into multiple smaller models makes it easier to manage file sizes.

The project BIM brief should be included in the RFT process and include the following BIM information and tasks: • Confirm the models, format and level of development, and information to be provided to the contractor by the project team • Design a BIM Execution Plan • Confirm that either the BIM Project Manager will be employed during the construction phase, or the contractor will need to provide a person for the role • Define the handover process from design to the BIM construction manager • Agree the format and level of development required to communicate handover models to the client / operator • Agree the format and resource information required to be communicated to the client / the operator.

Resources contain a large number of individual objects and related information about objects. Avoid the temptation to collect all information about each object on the resource. Gathering and auditing information both during asset creation and during asset storage and maintenance is costly. Avoid information overload by defining resource and related information important to management.

Each object should contain the following information: • Unique identifier • Location • Designed performance • Installed performance • Commissioning information • Manufacturer's data • Warranty details. Property information should be included in the BEP.

The BIM Assessment and Response template should detail: • Roles and responsibilities • Standards, methods and procedures • Collaboration procedures • Model and information quality assurance procedures • Proposed model delivery strategy info Project / asset information, if required

A BIM project execution plan should contain the following basic information: • Project information • Key project contacts • Project objectives • BIM applications • Information management and exchange • Collaboration • Project deliverables • Quality control • Model element development schedule • Reference documents and standards.

The BIM construction execution plan should contain the following baseline information: • Project information • Key project contacts • Project goals and objectives • BIM applications • Information management and exchange • Collaboration • Project deliverables • Quality control • Schedule for creating model elements • Reference documents and standards • Delegation Model and Details The BIM Construction Execution Plan should contain the following baseline information: • Project Information • Key Project Contacts • Project Goals and Objectives • BIM Applications • Information Management and Exchange • Collaboration • Project Deliverables • Quality Control • Model Component Creation Schedule • Reference documents and standards. • Handover model and details.

The Facility / Asset Management Plan (FM / AM plan) defines the customer's strategy for the day-to-day operation of the building. The plan should include the following: • Asset information hierarchy • Asset information requirements • Asset information policy • Preventive maintenance strategy • As-built model / documentation requirements.

Generating a model of existing conditions can be costly. As with other BIM processes, start at the bottom by creating clear guidelines for those undertaking the data collection. Discuss and agree on the following: • Accuracy required: includes both the graphical accuracy of the scanned objects and the accuracy of their location and relationship to geographic coordinates in all three dimensions • Area capture: scanning as much detail as possible - this can save re-scanning when to other applications require additional functionality • Data format: scanning generates large amounts of raw data. Decide who translates the data into useful information • Non-graphical information requirements: confirm the format and determine who is responsible for capturing the information and how it will be related to the graphical details The process of capturing existing features should be included in both the BIM guidelines and plan BIM execution.

LOD is a scale used to show the plausibility of the content that may be included in specific model elements at different times during model development. The main reason for including levels of detail in model element building schedules and BIM execution plans is to make it clear to each member of the design / engineering team - so they know what to write in their models at each stage and to what extent others can rely on their models.

A project's BIM briefing should clearly define the results. Currently, most contracts are 2D paper documents (drawings, schedules and specifications), but as the industry matures, models will also become contractual materials. This information should be included in the BIM Guidelines and BIM Execution Plan. When a model has an agreed transfer requirement - from design team to contractor or from contractor to customer / operator - confirm the following: • Separate or combined models • File format / type • Model inclusion - what's inside and what comes out 2D Results generated from the model should accurately reflect the model view. Do not modify models in their 2D format.

New Zealand construction contractors are looking to improve processes, eliminate risk and reduce errors. BIM provides a variety of benefits during the construction phases of a project, including: • Reduction of on-site waste and rework through better coordination • External manufacturing and prefabrication capabilities • Better health and safety through better planning • More accurate planning and cost management associated with BIM structures • Build capabilities and construction methodology reviews • Improved construction sequence planning • More accurate structure programming from testing / optimization of construction sequences.

A well-structured BIM process can provide a building owner / operator with the following benefits: • Ability to review BIM models at every stage of design and construction to confirm facility maintainability • A faster way to populate AMS and CAFM systems with asset data exported from a BIM as-built model • Linking instructions operation and maintenance (O&M) with specific components in as-built BIM • More transparent commissioning processes by linking final commissioning results to as-built BIM for easy future retrieval • Facilitating a smoother completion of construction when using BIM in conjunction with a contracted framework such as CIBSE soft landings • Enabling FM to assess future building changes using As-built BIM • Use the ultimate BIM for space management. Note: Rooms should be modeled as "spaces" with clearly defined boundaries. • Improve the operational efficiency of the building by using BIM for energy analysis.

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[1] pixabay.com

[2] NEW ZEALAND BIM HANDBOOK - A GUIDE TO BIM INCLUSION IN BUILDING RESOURCES 2019 THIRD EDITION - BIM ACCELERATION COMMITTE; BUILDING RESEARCH LEVY; MINISTRY OF BUSINESS INNOVATION & MPLOYMENT HIKINA WHAKATUTUKI - THIRD EDITION - New Zealand 2019 - www.biminnz.co.nz https://www.biminnz.co.nz/s/NZ-BIM-Handbook-May-19.pdf