Why are cast iron outdoor trash cans less common in earthquake-prone regions?

In earthquake-prone regions, urban planners and city officials often avoid using heavy cast iron outdoor trash cans due to significant safety concerns. The primary reason is their substantial weight. During seismic activity, these heavy fixtures can become dangerous projectiles, toppling over and causing injury to people or damage to property. Their rigidity and lack of flexibility make them more susceptible to cracking or shattering upon impact with the ground, creating sharp, hazardous debris. Furthermore, the immense weight makes them difficult and slow to right after a quake, hindering cleanup and recovery efforts.

Instead, municipalities in areas like California or Japan prefer lighter, more resilient materials for public trash receptacles. Polymers, coated steel, and aluminum are common alternatives. These materials offer durability and corrosion resistance without the extreme weight. Many modern designs also incorporate flexible mounting systems or are freestanding with a low center of gravity to prevent tipping. This shift in material choice is a critical part of seismic safety design, prioritizing public safety and efficient emergency response over the traditional, heavy-duty aesthetic of cast iron.