Abstract: A system including one or more processors and one or more non-transitory computer-readable media storing computing instructions that, when executed on the one or more processors, perform certain acts. The acts can include obtaining an original load design for loading a trailer to deliver stacks of pallets to physical stores. The load design specifies a respective floor spot assignment for each of the stacks. The original load design satisfies center-of-gravity constraints. The acts also can include generating fluid groups of the stacks to form an initial fluid grouping. The acts additionally can include determining that the fluid groups do not collectively satisfy the center-of-gravity constraints. The acts further can include until the fluid groups collectively satisfy the center-of-gravity constraints, repeatedly determining one or more infeasible groups from the fluid groups, and adjusting at least one of the one or more infeasible groups to update the fluid groups.