A wall is really boring until it fails. A retaining wall is supposed to hold back soil to either support a structure or keep a space clear. When it fails, both of those roles are compromised. A retaining wall does not have to collapse to fail. In fact, a failure is perhaps better defined as when the wall does not perform as expected. (more…)
Defects that cause problems in machines are categorized into two different concepts. Manufacturing defect is a term that applies to a situation where the defect was unintended. For example, a part was installed that did not meet the designer’s specifications or quality. A design defect is another matter. Design defect is a term that applies to a situation where the defect resulted from a purposeful decision or by failing to investigate or heed available design criteria on the part of a designer or builder. (more…)
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