Revit LT is a building information modeler. You construct a project as a digital representation of the physical objects in the real world. However, not every component needs to be modeled in 3D. Architects and engineers create standard details to represent how materials in the larger project are constructed. Details bridge the gap between the design and building reality, conveying information to the builders and contractors on how a design should be built. Details are vital additions to a project, because they show how materials should interconnect.