Add a curve constraint to a mesh

To insert constraint lines to a slab, the following steps can be adopted in Sumo:

• Select the slab
• This will open the Slab contextual ribbon
• Go to General panel > Modify
• In the Options panel, ensure that the Constraint box is checked
• Draw desired constraint lines
• Click Accept to confirm

Note: Constraint lines restrict the mesh of the slab to be created along them. This function is best used for complex slab geometry e.g. openings.