What is the main weakness of all trusses that often leads to failure?

The primary weakness of all trusses that frequently leads to structural failure is found in the connection points. These are the areas where the individual members of the truss come together, and the integrity of these connections is crucial for the overall stability of the structure.

Connection points are typically made using metal connectors, bolts, or welds, which can be vulnerable to various stresses, including tension, compression, and shearing forces. When exposed to extreme conditions, such as high heat from a fire, these connection points can weaken, leading to a catastrophic failure of the truss system.

In addition, the design of these connection points is critical; if they are not properly engineered to handle the loads expected in real-world scenarios, they can become the weakest link in the entire structure. Issues such as corrosion, improper installation, or degradation over time can also compromise these critical connections, making them a focal point for potential failure in any truss system.

Understanding the importance of these connection points helps fire service professionals assess potential risks in structures and implement better tactics for firefighting and rescue operations.