Structural failure can occur from a range of different sources. The type of failure is often associated with the industry, environment and application of the structure. The primary reasons for failure are as follows: Weak structures. The structure is not strong enough to withstand the load to which it is subject. This is usually due to inappropriate geometric design or material choice Structural deterioration. The structure deteriorates due to corrosion, fatigue, wear, rot or creep. Fatigue failures often begin when cracks form at regions of high stress. These cracks grow when subject to cyclic loading, resulting in sudden failure. This is usually due to inappropriate geometric design, material choice or maintenance Manufacturing errors. This includes using the wrong materials or not following manufacturing procedures or standards. It can also result from poor workmanship or components being out of tolerance, etc
Defective material. The materials don't conform to standards, resulting in a lower load bearing capacity than designed Improper environmental considerations. Engineers may neglect mitigating features for certain environmental conditions, such as natural disasters