Do you know, that… ?

If you use a bracket welded constructions, often you need to perform the weld undercut. Unfortunately, not suitable for the usual rounding…

If the object is a sheet metal brackets – You can be used sheet metal features. If the sheet is not – this object is to be converted into sheet using Insert bends (preferred) or Convert to Sheet Metal.

Then, after selecting the tab corners You can choose to A faction corner. Unfortunately, this operation works identically to rounding – so is not suitable.

Only when unfolded sheet (which is still flat – So physically nothing changes) you can select the corner and further Cut the corner. In operation, use option undercutting to collect all or desirable corners.