An article accumulation pattern building load plate assembly is provided. The assembly includes a deck for support of patterned articles, a stop for retaining deck supported articles, and spaced apart guides adjustably positionable in relation to the deck so as to transversely guide articles thereacross towards the stop. Articles of the patterned articles are received at an ingress portion of the assembly from a metered article source, the articles extendable at least across a width of the deck in a direction transverse to an article ingress direction. The stop is adjacent the deck, extending in a direction transverse to the article ingress direction, the stop delimiting an egress portion of the assembly.