U-Frames are structures made of tubes with different diameter and wall strength that are interconnectible. There are many different variations of the U-Frames, but they all have one thing in common. They open the door of creativity in truss design planning, production and installation. These products can be connectted with each other in many ways creating not only two dimensional pipe webs but also 3D pipe formats either for show equipment hanging or simply as a special structural feature with significant design effect.