Sumo has two different categories of loads that can be used – Floating Loads and Hosted Loads.
Each of the two categories contains similar loading options (Point Load, Line Load, and Area Loads). An explanation of the two categories is listed below to show the differences.
Floating Loads are placed manually and are not linked to any element. When a Floating Load has been defined, the load can be moved, copied, or adjusted like any other element.
These loads are considered independent of other elements in a model.
Hosted Loads are anchored to the structural element on which it was placed. The load can’t be moved from its host. Since a Hosted Load is anchored to a structural element, it also changes as the host element is changed.
Each category of loads is useful for different conditions. Applying a UDL to the entire slab is a good example of where a Hosted Slab Load can be used. If only certain parts of the same slab must be loaded, e.g. pattern loading or checkerboard loading, a Floating Area Load would be more suited. Hosted Loads can be applied to Walls, Slabs, and beams. If a Plane shell is to be loaded, a Floating Area Load must be used.