Typically, when grading a site, an engineer or landscape architect will specify new spot elevations based on desired slopes and existing spot elevations. Grading is mainly just drawing lines across various areas and interpolating spot elevations based on slopes.
While Revit’s current hardscape and Topography tools are not ideal for grading a landscape, it does have the capability to calculate slopes and spot elevations for you. All you need is a custom family with some parameters and formulas set up the right way.
The Spot Slope can be a useful little tool out in the landscape. You can place one at any given point and immediately get the slope for that face. But they do have a few funny little quirks as well as some other limitations.
When working with Plantings, the default level-based family is great for plants that are on the ground. But what about Plantings in pots or planters?
With a lack of adequate hardscape tools in Revit, many firms and individuals have taken to modeling hardscape with a variety of other families. Two of the most popular hardscape alternatives are Floors and Roofs. They are quite similar in their structure and they can both be modified by sub-elements.
When I was first introduced to the concept of modifying sub-elements it was actually via a Roof. As I have seen the topic discussed and presented, it seems like Roofs are quite popular among architects and structural engineers, perhaps because they are more familiar with shape-editing Roofs. But after using both Floors and Roofs for hardscape, I have found Floors to be the better option.
Here are the reasons why I use Floors for my hardscape (and not Roofs):