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Static loading is a load that doesn’t change over time. In engineering, static loads tend to be better defined and require less of a safety factor on them then dynamic loading. It is also common practice to take a snap shot in time of a mechanical system and assume it is static in order to simplify the analysis process. In many structural codes, the types of loading are split into static, cyclical and incidental or some variation, and indicate a different safety factor for each based on the degree of risk each poses. For instance, a static load on an overhead crane would be the weight of the structure, block, etc., because those never change.