Abstract: A double depth vault has a floor and opposing spaced side walls and end walls forming a burial enclosure. An intermediate floor panel is mountable in the enclosure at a predetermined location spaced above the floor to divide the vault into a lower burial chamber and an upper burial chamber. Pairs of aligned vertical guide grooves are provided in opposing walls of the vault to extend from the open end towards the floor, terminating at the desired intermediate floor position. Opposite edges of the intermediate floor member facing the grooved walls of the vault each have at least two spaced projecting pins for engagement in the respective guide grooves as the intermediate floor member is lowered into the vault. The closed ends of the guide grooves provide stops for engagement by the respective pins to support the intermediate floor member at the desired height in the vault.