A non-uniform beam is a beam created of plate materials, which welded together into a profile of a constant or a variable cross-section.  Thus profiles of such beams may fluctuate not only by length as well as by thickness. One of the typical examples of using non-uniform beams is presented below:  

• 2.16.8 The Welding assignment
• 2.17 Non-Uniform beams in Tekla Structures
• 2.17.1 Non-uniform beams created of a profile in the Tekla Structures