Wright dreamt of including 76 five-storey, “atomic-powered” lifts in the Illinois. The Kingdom Tower will have 57 of the non-atomic variety, including five of the world’s fastest “double-deckers” travelling at up to 10 metres per second (there are faster single-deck lifts, but apparently they can induce bladder problems). Conventional steel ropes limit a lift’s reach to about 500m, but Finnish manufacturer Kone’s carbon fibre-based UltraRope extends that, so here the lift shafts are designed up to 660m.