Non-engineered or owner-constructed structures are generally more vulnerable than engineered structures due to several reasons:
1. Lack of Design Expertise: Non-engineered structures are often built without the input of structural engineers who specialize in designing safe and resilient buildings. This can result in poor structural design and inadequate load-bearing capacity, making the structure more susceptible to collapse or failure during natural disasters or extreme weather events.
2. Quality of Materials and Construction: Owner-constructed structures may use inferior quality materials or construction techniques compared to engineered structures. This can lead to weaknesses in the structure's integrity, such as inadequate reinforcement or improper installation of load-bearing elements, increasing the risk of structural failure.
3. Compliance with Building Codes: Engineered structures are typically designed and constructed in compliance with building codes and regulations that ensure minimum safety standards. Non-engineered structures may not adhere to these codes, leaving them vulnerable to structural deficiencies and safety hazards.
4. Resistance to Natural Forces: Engineered structures are designed to withstand various natural forces, including wind, earthquakes, and floods, based on rigorous analysis and testing. Non-engineered structures may lack sufficient reinforcement or structural support to resist these forces, making them more vulnerable to damage or collapse.
5. Long-Term Durability: Engineered structures are designed with durability in mind, considering factors such as material degradation, corrosion, and environmental exposure over time. Non-engineered structures may not have been designed to withstand long-term wear and tear, leading to deterioration and increased vulnerability to structural failure.
Overall, the lack of professional design, inadequate construction practices, and failure to comply with safety regulations make non-engineered or owner-constructed structures more vulnerable to damage and collapse compared to engineered structures.
