Chapter 12
Walls and Curtain Walls
According to the American Institute of Architects (AIA) document E202 BIM Protocol Exhibit (the AIA’s original contract document for BIM), there are five levels of model development ranging from 100 to 500. If you examine excerpts from the model content requirements describing each level of development (LOD) for the design professions—LOD 100, LOD 200, and LOD 300—the evolution of modeling granularity becomes apparent. Although LOD 100 represents a conceptual level of information defined as “overall building massing,” LOD 200 and LOD 300 are represented by “generalized systems or assemblies” and “specific assemblies,” respectively. This chapter will help you create walls that comply with both LOD 200 and LOD ...
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