US Patent 10256616 Self centering enclosure

Enclosures are disclosed for use in underground applications. The enclosures include walls with end portions that are angled outward with respect to a middle of the wall such that the enclosures can be stacked on top of one another despite a draft angle of the walls. The bottom corners of the enclosures are aligned with a top surface of the enclosure to allow stacking. The enclosures include an opening in the bottom such that when multiple enclosures are stacked on top of one another, the enclosures for a single larger enclosure that can be used in underground applications.