Abstract: An easily-stackable joist support structure is provided having prefabricated tabs embedded within the main plane of the support structure to allow the tabs to be bent during construction. The tabs typically have both slot screw holes and fixed screw holes. Once the tabs are bent (typically to a 90 degree angle), a screw partially engaged through the slot and the joist can hold the joist in place while the joist is adjusted before the screw is fully engaged. Then screws can be engaged through the fixed screw holes to fully hold the joist in place. The support structure can be Z-shaped so that one ledge lays on top of the ceiling track before the support structure is attached to the track, and the other ledge is used to support the joist before the joist is attached to the support structure.