The level of detail that is included in a LOD400 model is critical to its accuracy and usability for a 3D modeling service. This level of detail allows for measurements directly, without the use of non-modeled information. The level of detail that is included depends on the needs of different trades. In general, LOD400 modeling will include information from all trades, including mechanical and electrical. In some cases, it will be necessary to model the elements at a higher level for prefabrication and coordination.
The most important difference between LOD 300 and LOD 400 modeling is the scheduling of trades. The different disciplines complete their respective stages at different times. For example, structural steel will typically come first, followed by architectural elements. MEP will usually be last. In both cases, coordination is essential to ensure that the project moves smoothly from concept to reality. It is critical that no work is started until the entire team has agreed on it. This level of coordination will lead to increased certainty when it comes to installation.
The different levels of LOD are divided into five levels. At the LOD 400 level, manufacturers typically describe components in greater detail. They also include extensive information about each component. For example, manufacturers may include wattage, warranty information, suppliers’ contact information, and even the model number of each light fixture. The higher the LOD level, the more detail and features are included in a BIM model. Ultimately, the level of detail in a model should depend on the needs of the client and the level of complexity.
If the main contractor had asked the architect to provide a LOD300/350 model of the building and incorporated its design, the project would have been much easier and faster. Moreover, the main contractor could have benefited from more advanced and progressive modeling. They could have performed clash detection, 4D scheduling, and 5D scheduling. But the LOD400 model was of minimal benefit for the main contractor. Moreover, it posed a greater risk of miscommunication and wasted time and money.
After the completion of a BIM 3D construction modeling, the construction stage of the LOD includes the fabrication, assembly, and installation stages. Detailed information regarding the construction process is also included in the LOD 400. Finally, at the LOD500 level, verification of the building elements is completed. This final stage helps the building facility manager understand the overall condition of the building. The final fabrication phase is often the most costly. This stage also involves the integration of LOD400 and MEP VDC model data.
Creating LODs is a relatively easy task. First, the model needs to be simplified by removing unnecessary geometry. If the model has too many polygons, turn off turbosmooth. In addition, you may want to use manual polygon removal, which will reduce the polygon count. But remember that these optimization options can destroy the UVs of your model and can also damage its performance. Therefore, it is more efficient to create LODs by converting textures.
