Revit Array Formulas: How to Use Advanced Array Formulas in Revit Families

Are you a Revit user who is looking to take your Revit Families to the next level? If so, then mastering Revit Array Formulas is essential. In this blog post, we’ll explore the use of advanced array formulas in Revit Families. We’ll go beyond simple math equations and explain how you can use advanced array formulas to get the most out of your Revit Families. With the power of Revit Array Formulas, you can quickly and easily create complex models and save time in the process. So let’s get started and learn how to use advanced array formulas in Revit Families!

What is an Array Formula?

Array formulas are a powerful tool in Revit Families, allowing you to create multiple copies of an element in a pattern. By mastering array formulas, you can save time and create families that are more flexible and powerful. Array formulas can be used to create linear arrays, radial arrays, and even more complex patterns.

When creating an array formula, you must define the parameters necessary to create the array. This usually includes things like offset, spacing, count, angle, and instance. You can also use length parameters, Yes/No parameters, and nesting if formulas to further customize your array formula.

You can also use advanced array formulas to restrict user inputs to a range or round a number to the nearest multiple of another number. Advanced array formulas can also be used to lock a Yes/No parameter, using an “and” statement, or use conditional statements and “not” statements for complex results.

For more tips on mastering Revit Families and array formulas, check out our Revit Families Cheat Sheet. There you’ll find formula syntax guides, geometric relationships charts, natural logarithm tutorials, absolute value calculators, and other resources to help you explore advanced array formulas. Finally, you can learn how to set up conditions for the visibility parameter for each element in the family.

Simple Array Formulas

Array formulas are a great way to quickly and efficiently create multiple copies of the same element in Revit. Using the basic math operators, you can easily create arrays of any size and spacing. For example, you can use the formula =(Length*2)-(Width-3’-0”) to create a 2×2 array with each copy separated by 3’-0”.

However, it’s important to note that when using array formulas in Revit, you need to make sure that the resulting value is of the right type. For example, if you are trying to create a Yes/No parameter, the result of your formula must be either “Yes” or “No”. If not, your formula won’t work properly.

You can also use more advanced techniques, such as locking a Yes/No parameter or using an And or Not statement, to create more complex array formulas. With these techniques, you can take your Revit families to the next level and really get the most out of Revit’s array formulas.

Advanced Array Formulas

When working with arrays in Revit, it is important to protect your family from breaking when the array is set to one. To do this, you can use a formula for the Number of Array parameter that will always keep a minimum of two elements in the array: if((Total Length / Element Width) < 2, 2, (Total Length / Element Width)).

In addition to using basic math operators, you can also create more complex conditions using the “and” and “or” operators. For example, you can use the following syntax to create an extrusion that only appears if two conditions are met (the Depth is smaller than 5′-0″ and the Width is larger than 2′-0″): and(Depth < 5′-0″, Width > 2′-0″).

The “not” operator can also be used as a workaround when trying to achieve greater than or equal to (≥) and less than or equal to (≤) conditions. For example, if you want x to be greater than or equal to y, you can use the formula: not(y > x).

You can also use Yes/No parameters to make locking a Yes/No parameter easier. The following formula can be used to round x to the nearest multiple of y: if(mod(x, y) > (y/2), ceil(x/y)*y, floor(x/y)*y).

By mastering these advanced array formulas in Revit families, you can take your Revit projects to the next level and create advanced Revit families.