By using a seam object, you can split a plate system into separate child plate subsystems. A seam is always attached to one or more plate systems. Use the following best practices when working with seams. Also refer to Creating Seams.
Avoid overlapping or coincident seams
Do not place seams that overlap. Overlapping seams can cause trimming issues. In the following example, two seams overlap.
Instead, place a single seam.
Avoid seam boundaries at tangent points
Seams at tangent points can cause problems when detailing. Do not place separate seams.
Instead, place a single seam to avoid seam boundaries at tangent points.
Avoid seams that are coincident with system boundaries
To avoid weld and other detailing issues, do not place seams that coincide with the system boundary.
In the following example, a seam from point b to point c is not required and makes detailing and trimming of the plate difficult.
1 - Seam coinciding with the plate boundary
Instead, place the seam only from point a to point b.
Avoid seams that end in the middle of the plate
To avoid detailing problems, do not place seams that do not completely split the plate. Place a seam across the plate touching the plate edges.
Seams by projection on non-planar plate systems
When you place a seam by projection on non-planar plate systems, extend the ends of the seam past the plate boundaries.
Seams by projection
When you place a seam by projection, connect the elements in Sketch 2D when the seam consists of multiple elements.
Split the intersection seam before creating a design seam
Split an intersection seam before creating a design seam that is bounded to the intersection seam.
In the following example, only a part of the plate is required to be cut. If the design seam is created without splitting the intersection seam, then the complete plate is split by the design seam. If you split the profile seam first, then a design seam can be created that ends at the profile edge.
Split the profile to create the intersection seam, and then create the design seam and bound it to the intersection seam.
Closed edge reinforcements with seams must have at least two seams
You need to create at least two profile seams on a closed-edge reinforcement. For example, create one seam on the port side and the other on the starboard side. Select Auto Split and select the port solution to solve the ambiguity.
Continuous and intercostal seams
Create longer continuous seams before creating shorter intercostal seams. This helps in detailing and reduces ambiguity.
Modifying the seam geometry causes the seam to re-split
When you modify seam geometry, the software reruns the splitting operation on the seam. This might affect the objects that intersect with it. Plan seams carefully and proceed with caution if you need to modify a seam.