Weldments and Structure System Weldments functionality enables you to design a weldment structure as a single multibody part. Structure system is an advanced weldments environment that lets you create and modify structural members of different profiles in one feature. Contents Weldments You can use 2D and 3D sketches to define the basic framework of a weldment structure, then create structural members containing groups of sketch segments. Pattern and Mirror Support You can pattern and mirror structure system members using the Linear Pattern, Circular Pattern, or Mirror tools. Structure System The structure system uses primary and secondary structural members in a workflow that makes it easier to create complex structure systems with flexible corner management and trimming.