3D MODELLINGLEVELS OF DETAILING GUIDE
It is crucial to realize that the bulk of BIM software, including REVIT, AECOsim, and ArchiCAD, was created with the intention of designing entirely new structures that needed to be freshly built. This is critical to keep in mind while BIM modeling existing objects based on the point cloud. The majority of the time, 3D laser scanning is used to create an inventory of existing structures. This approach is very thorough and accurate. Nevertheless, it takes a lot of work to swap out the point clouds for a BIM model. Sadly, this is frequently constrained by the capabilities of a piece of software. We will have to deal with a lot of issues and conundrums when building a mapping in the form of models based on scan data, such as presumed accuracy and detailedness investigations.
The following summary and categorization are used with modeling simplifications in order to reach a client agreement and determine how the ordered data will be used later. You don't have to interpret something literally. Assume, for instance, that the necessary model must be created in LoD2, but upon request, we can additionally include pertinent components like windows or doors. It is crucial to reach the highest level of client agreement possible when it comes to the requirements at the valuation stage.
The time needed to create the data and the project's budget are both directly impacted by the difference in the level of information, though. We perform a Model Quality Check at every step of the BIM model creation process and at the end of everything. Only the most crucial stages of the control process are shown here. A client questionnaire is included below. The customer can choose which components need to be modeled from a detailed list.
⎡ LEVEL 1 ⎦
Objects depicted on Level 1:Approximate general shapes of major static objects and their locations:● Walls● Window openings● Doors● Pipes● Interfloor overlaps● Bearing construction elements (columns, beams, etc.)● Equipment (conveyors, engines, electric boxes, etc.)● Lamps
General landscape without precise heights (for exterior):● Roads and sidewalks● Green areas
Objects not depicted on Level 1:● Small equipment (pipes with a small diameter (less than 50mm), valves, pipe connections, flanges, indicators, cable trays)● Steps on ladders, barriers● Different types of frames● Mobile objects (carts, wires, cables, etc.)● Any other exterior and interior details
⎡ LEVEL 2 ⎦
Level 2 is a step up from Level 1, offering a more detailed representation of the object or scene. At this level, the focus is on improving the overall look and feel of the model, while still maintaining a balance between efficiency and realism. The model may have a more complex geometry, with additional details.
Objects that are depicted on Level 2:Precise general shapes of major static objects and their location:● Wall● Window● Door● Interfloor overlap● Bearing construction elements (columns, beams etc.)● Frame● Simplified barriers● Ladders with steps● Simplified cable trays● Equipment (conveyors, engines, electric boxes etc.)● Lamps (generalized appearance)● Pipe connections● Simplified valves and flanges
More precise landscape with approximate heights (for exterior):● Roads and sidewalks● Green area● Stairs, ramps
Objects that are not depicted on Level 2:● Small equipment (pipes with small diameter (less than 50mm)), valves, indicators● Mobile objects (carts, wires, cables etc.)● Any other tiny exterior and interior details
⎡ LEVEL 3 ⎦
Level 3 is the medium level of detail, where the focus is on creating a believablerepresentation of the object or scene. At this level, the model may have a highlydetailed geometry, with intricate details. Level 3 is used for renovation, reconstructionand visualization purposes.
Objects that are depicted on Level 3:Precise general shapes of major static objects and their location:● Wall● Window● Door● Interfloor overlap● Bearing construction elements (columns, beams, etc.)● Frame● Detailed barriers● Ladders with steps● Simplified cable trays● Equipment (conveyors, engines, electric boxes, etc.)● Lamps (generalized appearance)● Pipe connections● Generalized valves and flanges
More precise landscape with precise heights (for exterior):● Roads and sidewalks● Green area● Stairs, ramps
Objects that are not depicted on Level 3:● Small equipment (pipes with small diameter less than 50mm), valves, indicators● Mobile objects (carts, wires, cables, etc.)● Any other tiny exterior and interior details