1/7/2023 0 Comments Revit family surf![]() Reference lines serve the same function as reference planes, but they can be used to constrain angles. Example: Creating reference planes for a table family This issue is less likely when constraining to reference planes. If you use geometry faces for constraints, you can sometimes encounter “Can’t make type” errors because a constraint becomes invalid. Using reference planes as a framework like this is more reliable than constraining just geometry. The geometry that you create for them will be constrained to the reference planes so when they change position, the geometry will follow. Use reference planes to define all critical positions, static and variable, in the family. Add more reference planes to define the position of the legs of the table as they relate to the table edges. ![]() In this case, you need to build a framework using reference planes and reference lines.įor example, if you are building a table, create reference planes to define the front and back edgesand the right and left edges of the tabletop. If you want a family that can change size or has moving parts, create a parametric family –that is, one that uses parameters to control its behavior. For my sample table family, I’ll use the Furniture family. Some categories, however, have multiple templates based on what will host the element i.e.wall, ceiling, or face.Įxample: the Generic Model category offers multiple templates based on how the family will be usedWhen deciding which template makes the most sense for your family, consider how it will be used in a model. In most cases there is only one template to use based on the category. The category also determines how Revit treats the element for scheduling and controlling the visibility and graphics of the element. For example, a window must be hosted by a wall (it can’t exist by itself), while a column extends up from one level to the next. The category – window, door, furniture, etc. What is variable? What is not variable? What needs to stay in place? I can see how things might be related to one another and can start a list of parameters or information needed for the family.Įxample: Planning a Revit family for a table The first step is to select category and template Start by doing some planningīefore creating Revit families, I personally like to organize my thoughts and plan what I am doing very simply on paper to give me an outline that helps me understand the geometry I will need. In this article I will outline the basic workflow of making a Revit family and what to consider as you begin to create custom families. If you need a different size of an element, the DNA in the family remains consistent and tells your element how to create a different-sized version. When you place a family into a model, this DNA is used to make the element. The family describes the basic geometry of the element, the behavior/relationships of the geometry, and defines the element’s parameters. Simply: the family contains the DNA of how to make an element in Revit, and when you author Revit families, you are writing the DNA code for an element. However, as I have learned more about Revit, I’ve realized Revit families are at the core of Revit and not only does the term itself have much more meaning to me but it helps me understand how Revit works. When I first started using Revit, I had a hard time with the term Revit “ families”.
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