The Imperial construction yard can build nanocores for the following structures: * Instant generator * Ore refinery * Instant dojo * Mecha bay * Imperial docks * Nanotech mainframe * Defender VX * Wave-Force tower (requires Nanotech mainframe) * Psionic decimator (requires Nanotech mainframe) * Nanoswarm Hive (requires Nanotech mainframe) * Giga Fortress (Uprising only, requires Nanotech mainframe)