Use this procedure to create a Barrel Vault mass element. The insertion point of the Barrel Vault mass element is at the centroid of its bottom face.

Barrel Vault mass element in 3D and plan views
- On the Massing tool palette, select the Barrel Vault tool.
Alternatively, you can click
.
- Specify the first corner of the Barrel Vault.
- Drag the cursor and specify the second corner of the Barrel Vault.
- Enter a rotation angle, or press Enter to accept the default angle of 0.
- Continue adding Barrel Vault mass elements, and press Enter.