3. Durability and Longevity Made from high-quality materials such as cast iron or composite materials, inset manhole lids are engineered to endure the wear and tear of urban environments. Their design can also help distribute weight more evenly than traditional lids, potentially extending their lifespan and reducing the frequency of replacements.
Moreover, the materials used in manhole covers have evolved, expanding beyond traditional cast iron. Innovations in technology have led to the development of composite materials that are lighter, more durable, and resistant to corrosion. This development allows for greater flexibility in design; urban planners can explore a wider range of shapes and sizes tailored to specific streetscapes or functional requirements.
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