BIM Building Information Modeling 1 - (Page 5)

to work from. In practice today, the project teams that are currently working with BIM are producing multiple special-purpose models that serve specific needs. These might include: • Architectural, Structural, MEP and Site design models • Schedule model (also known as 4D model) • Cost model (also known as 5D model) • Fabrication/ shop drawing model • Construction model • As-built model Because BIM is still evolving as a method of practice, there is no single certified best-practice for who should create which models of what aspects of a project. Various project teams are experimenting based on projects needs, the capabilities of the modeling tools available, and the expertise of the team and its consultants. Although this sounds eerily similar to the current “silo” practice of numerous individual sets of drawings, the fundamental and critical difference is that these models are digital so the underlying databases that contain the information can work together to provide much of the value that would be achieved by having a single model. This is the core principle of “federation” among the models, where there is no single central BIM. Rather, the separate models created by specific team members can, to a large measure, “interoperate” with each other and with the growing number of specialized software applications that extract information from design models and perform very useful functions, quickly, accurately and digitally. These “enabling applications” exponentially increase the value of the design models, and create a powerful federation of data and computing capability. For example, coordinating the work of the various design disciplines is one of the traditional challenges in a construction project, and the source of many conflicts. Effective and nearly complete coordination is currently one of the most common examples of the power of this federated model with BIM. Software applications such as Autodesk NavisWorks, Solibri or Bentley ProjectWise Navigator can automatically identify clashes between proposed design elements in different models, and teams are now able to issue fully-coordinated designs, rather than expensively discovering the hidden conflicts in the field. As another example, model-checking programs such as Solibri can automatically evaluate models for compliance with a wide variety of pre-determined business rules, such as building codes for emergency egress or accessibility regulations. Source: NavisWorks Source: Solibri TOP: NavisWorks provides teams the ability to virtually detect conflicts between systems that have been modeled in different BIM design tools. Here, mechanical piping is seen conflicting with ductwork. If this were not discovered until installation was underway in the field, costly and timeconsuming rework would likely be required. BOTTOM: Solibri makes software that applies user-selected business rules to automatically check BIM design models for a wide variety of criteria and produces reports highlighting instances of non-compliance. It can also measure, count and calculate spaces, elements and objects in a model. BIM 5

Table of Contents Feed for the Digital Edition of BIM Building Information Projects No 1

Cover How Building Information Modeling (BIM) is Dramatically Transforming the Design, Building and Operation of Projects An Interview with a Local AGC Chapter on Its Nationwide BIM Training and Validation Program Launch BIM - more than just a clash detection tool A Contractor Tells How They Made BIM Work for Their Firm BIM’S Sixth Dimension: RISK AND RESPONSIBILITY ALLOCATION Experiencing the Benefits of a New Tool AIA Member Perspectives on BIM Thoughts From a Digital Imaging Firm

BIM Building Information Projects No 1

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