> For the complete documentation index, see [llms.txt](https://docs.besmart.software/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.besmart.software/common-for-several-products/smart-assemblies/special-parameters/exclude-from-gravity-point-calculations.md).

# Exclude from Gravity Point Calculations

To insert the Gravity Point or to calculate the mass of an Assembly, all solids in the Assembly must have a material with an assigned density parameter.

By using **Exclude from GP** parameter, you can make an exception to that.

![](/files/eQOF9eAaXdbtpbQs8XCY)

All elements that have this parameter turned ON will not be included when calculating the Assembly mass or the center of gravity.

In this example, the grout tube for a precast wall has this parameter active, so the Assembly Mass and Element Mass parameters are empty:

![](/files/m9TH5a9C7PYSSZAtf7C4)

Other families, however, were included in the calculation of the Assembly Mass and the center of gravity.

![](/files/WWzkeKBY5SnNxVm5p4Q5)


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