What is the 35 foot rule for hot work?

Could you please elaborate on the 35 foot rule for hot work in the context of cryptocurrency and finance? I'm curious to understand how this safety regulation, typically associated with construction or industrial settings, might apply to our field. Is there a specific scenario or practice in cryptocurrency or finance that necessitates such a rule, or is this a metaphorical reference I'm missing? Clarifying this would greatly help me grasp the connection between the two seemingly unrelated concepts.