A bulkhead is provided. The bulkhead includes a panel that extends between first and second primary and secondary edges that are perpendicular to each other. The first primary edge includes a plurality of cutouts, and the second primary edge includes a first plurality of fingers and a second plurality of fingers. Each of the first plurality of fingers includes a first tongue extending from a first side of the second primary edge and away from a primary centerline and also includes a first groove extending from a second side of the second primary edge and toward the primary centerline. Each of the second plurality of fingers includes a second tongue extending from the second side of the second primary edge and away from the primary centerline and also includes a second groove extending from the first side of the second primary edge and toward the primary centerline.