# Load A Load applies a (usually constant) force, torque, mass-proportional or generalized load onto Nodes or Objects via Markers. The requested `Marker` types need to be provided by the used Marker. The marker may provide more types than requested. For non-constant loads, use either a `load...UserFunction` or change the load in every step by means of a `preStepUserFunction` in the `MainSystem` (mbs). ```{toctree} :maxdepth: 1 loadGeneral LoadForceVector LoadTorqueVector LoadMassProportional LoadCoordinate ```