Cross partition interlock using enlarged tab

In a partition assembly having interlocking longitudinal and cross partition strips, an interlock for interlocking a longitudinal partition strip with a cross partition strip such that the strips hinge along a hinge axis at the interlock between a fully open configuration with the longitudinal and cross strips perpendicular to each other and collapsed configurations with the strips generally overlying, said interlock comprising a first slot in one of said longitudinal and cross strips which opens at an edge thereof and extends inwardly and terminates within said strip, tab retaining edges adjacent the hinge axis, said tab retaining edges generally facing each other and spaced apart along said axis, said interlock further comprising a second slot in said other of said strips, said second slot interfitting with said first slot, and being open at an edge of said other strip and extending inwardly therefrom to terminate within said other strip, said second slot having a tab extending from a side edge of and into said slot, the tab having a base portion defined between corners at opposite ends thereof adapted to engage the tab retaining edges of said first slot to help lock the longitudinal and cross strips in interlocking engagement, said tab further having a portion that extends beyond at least one of said base corners in the direction of the hinge axis and overlies a portion of said one strip with the partition assembly in either collapsed configuration.