---
title: "Separate Shell"
slug: "cyclone-3dr-separateshellc"
updated: 2026-09-07T11:51:46Z
published: 2026-09-07T11:51:46Z
canonical: "rcdocs.leica-geosystems.com/cyclone-3dr-separateshellc"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://rcdocs.leica-geosystems.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Separate Shell

![CmdTankSeparateShell.svg](https://cdn.document360.io/820e11db-8ed5-45ae-ac86-f6b77dcb2aa7/Images/Documentation/CmdTankSeparateShell.svg)

This command is used to isolate the shell from the rest of the tank. The command splits the tank mesh in 3 meshes:

- the roof
- the shell
- the bottom plate

The lines that limit the shell and other meshes from the shell are also given as result of this command.

> [!TIP]
> ### Requirements
> 
> To enter the command, a tank project must already exist. If several projects exist, first select the corresponding project in which you want to work.

> [!WARNING]
> ### Notes
> 
> If the automatic computation fails it is possible to use other tools. For example:
> 
> - It is possible to draw lines that delineate the shell from the roof and the bottom plate using [Single Breaking Line](/v1/docs/cyclone-3dr-singlebreakinglinec) command (in the Polyline menu), and then run the Separate Shell command with those selected lines.
> - It is also possible to segregate the different parts with the Meshing \ Constraint Mesh command (in the Mesh menu).

> [!TIP]
> ### Tips & Tricks
> 
> The line that represents the circumference of the bottom plate can be selected and used to launch [Differential Settlements](/v1/docs/cyclone-3dr-differentialsettlementsc) command. Afterwards, points will be extracted from this line.

![separate shell.jpg](https://cdn.document360.io/820e11db-8ed5-45ae-ac86-f6b77dcb2aa7/Images/Documentation/separate%20shell.jpg)

Fig. example