SOLVED: Area Calculation Totals – Rounding and Precision

In one of the previous articles of What Revit Wants an issue was raised about the inaccuracy of Revit in calculating the sums of areas of a project, Area Calculation Totals – Rounding and Precision, and a possible solution.

A follower of this blog, Максим Ашихмин, proposes a solution using a rounding formula incorporating a calculated parameter (parameter type: Number) with the following formulas:

  • round(Area / 1 м² * 100) / 100 – rounding to 2 decimal place
  • round(Area / 1 м² * 10) / 10 – rounding to 1 decimal place

Source: SOLVED: Area Calculation Totals – Rounding and Precision

Exemple of the issue:

How to delete unhosted insulations, impossible to select

This failure occurs in circumstances such as updating the model to a higher version of Revit MEP or in case of an error among the ducts and pipes and the solution that the progrma offers is delete them. In these cases, the isolations occasionally hosted by the ducts or pipes are maintained in our project but we are unable to manage them in any way. Here is a brief tutorial for deleting them.

Hiding Revit Family Parameters in a Project

In the various Revit software packages, it is possible to hide family parameters so that they are not visible in the family’s properties when in a project file.  This is often desirable for situations where the family creator does not want the user to even know that the parameter exists within the Revit family.  This can be helpful for keeping the parameter from being easily modified or just keeping the parameter area less confusing.  Parameters that are used strictly for calculation purposes are an example of parameters that may be hidden.  Parameters that are used behind the scenes to control visibility of objects based upon other criteria is another example of parameters that may be hidden.

Some characteristics of hidden parameters include:

  • Parameters that are set to be hidden can only be seen and modified by opening the family in the Family Editor.  These parameters will NOT be seen when choosing the Edit Type button for the family’s properties while in a project file.
  • Parameters can only be hidden through the use of Shared Parameters, and only Shared Parameters can be hidden.
  • The ability to hide a parameter must actually be done prior to adding the parameter to the family.
On the Aplying Techonology to Architecture blog,  Douglas Bowers writes all the above and the steps needed for the configuration of the parameter visibility in his article Hiding Revit Family Parameters in a Project