To Create an Edge Rip
1. Click > > 
Edge Rip. The Edge Rip tab opens.
Edge Rip. The Edge Rip tab opens.2. Click Placement. The Placement tab opens.
3. Select one or more edges or chains of edge references to add to the set of edge rips.
4. Select a seam type from the list.
◦ For Blind and Gap, set the dimensions.
◦ For Overlap, if required perform any of the following operations:
▪ Click Add Gap and set a value for the dimension.
▪ Click Flip to reverse the wall overlap direction.
 | You can set the seam type and any required dimensions for Gap, Blind, and Overlap in the Seam area of the Sheetmetal Preferences dialog box, or in the Parameters dialog box. |
5. To create a new set of edge rips, click New Set and add any additional edges to rip. For each set, define any required dimensions.
6. Click 
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