The floor's chosen preparation for the apocalypse: buy dynamite, hold the choke points.
Named among the supplies crawler groups are buying from The Desperado Club in the hours before the collapse, alongside smoke curtains. Carl's prediction to Imani C is that everyone will have to fight — carve a way to the stairwells and hold the path open while people go down — and dynamite at a chokepoint is the cheapest way to do that. Gwendolyn Duet's advice in the chat, once it starts, amounts to the same thing.
Crates of stable hobgoblin explosive, sold by the armful.
The evacuation's standard-issue chokepoint weapon.