A pyrotechnics support apparatus includes a base structure with side walls connected to end walls to define an internal cavity. A tab member extends at an angle from each of the end walls across a width of the end walls. The tab members each include a plurality of slots. A plurality of dividers are selectively connectable to the base structure in the slots in the tab members and between the end walls. The support apparatus provides a sturdy foundation for the safe and precise firing of an array of pyrotechnic devices and is specifically configured to increase efficiency and safety.