Level 100 Models include elements such as Masses and are used for preliminary studies, such as Conceptual Design and Overall Project Phasing. Analysis based on their Location and Orientation can be performed. Quantities based on Overall Area and Overall Volume can be obtained.
Level 200 Models include elements in which Masses have been replaced with Generic Components. Analysis based on Overall Systems can be performed. Quantities based on specific Elements can be obtained. The major characteristics of components are their thickness and width allowing quick takeoffs.
Level 300 Models include elements in which Generic Components have been replaced with fully defined. Assemblies. Analysis based on Specific Systems can be performed. Quantities based on Materials can be obtained. The model can be leveraged for the generation of traditional Construction Documents and Shop Drawings. The model can be used for analysis such as Energy Performance, Clash & Cost.
Level 400 Models include elements that are accurate in terms of size, shape, location, quantity and orientation with complete fabrication, assembly and detailing information. At this Level, the Model may also have nongeometric (3D) information such as text, dimensions, notes, 2D details, etc. The model is a representation of the proposed elements. Analysis can be performed such as Energy Performance, Clash Detection, and Sequencing & Cost.
Level 500 Models includes elements modelled as constructed. Elements are modelled to accurate size, shape, location and orientation. Non-geometric or physical attributes are included as parameters to the geometric shape. At this level, model granularity is similar to LOD 400 with the exception that elements are as-constructed. At this level, the model is capable of being utilized for operations and maintenance.
Model’s shall be created providing an accurate representation of geometry needed to support specific BIM use. The level of detail needed will vary by object and by model, and the BIM itself may not represent the exact design intent of real live elements. As a rule of thumb, any object that fits within a 6”x6”x6” cube should not be modelled. Rather than modelling provide a generic node, or other graphic which contains appropriate parametric characteristics. Examples of this may be a telephone or a junction box which may only require a generic representation as a modelled element containing the correct parameters and properties, this same modeled element may be represented in typical views such as plan, elevation, and section with the standard technical symbol.
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