A reinforced paperboard box for storage and shipping of elongated items is described. The box is formed from a single piece of paperboard and may be rapidly assembled without the use of tools. The box comprises an elongated rectangular bottom panel, first and second joined side panels, a top panel, a front reinforcing panel and dividing partition all foldably joined at elongated edges and constructed to form a multi-level elongated box. The first side panel has a pair of abutting end panels foldably joined to either end, with a tab receiving panel and a locking panel foldably joined to either side of the end panel. The second side panel has a pair of end panels foldably joined to either end, that are locked in place by the locking panels and tab receiving panels of the first side panel. The dividing partition is includes at least one pair of cuts and a series of perforations enabling the dividing partition to be folded inwardly so as to divide the interior space of the box into at least two compartments. Variations of the invention include additional perforations along the dividing partition and locking panels to aid in assembly of the box. Other variations include angled cuts to the dividing partition for special shaped compartments and use of multiple cuts and related perforations in the dividing partition to form a plurality of compartments within the box.