Before answer this question, how many of you understand the word ‘Metal Fatigue’? Generally speaking, metal fatigue can be described as the progressive structural damage that occurs when it is subjected to repeated stress loading. Each metal component has a maximum amount of weight that it can handle being loaded on top of it and then unloaded in cyclical waves. However, even when you keep the weight below the maximum allowable amount for safety, metal fatigue can still occur.
Here are some recommendations for handling with the problem. Firstly, avoid adding additional weight to the metal when possible, such as the unloading equipment or personnel. Changing weight patterns cause the material to expand and contract in reaction, in effect bending the metal and creating fatigue.
The second key point is to match the temperature of the metal component to the temperature of the room. For example, if you move the component from a cold room to a hot room and immediately start putting weight on it, it will not have had enough time to adjust, therefore increasing fatigue. Once the component is back to room temperature, you can begin loading.
Thirdly, Take care of the metal components. Do not expose them to excessive amounts of moisture, for example. This can cause corrosion. When you take good care of the metal, it's much more likely to last longer and reduces the chances for metal fatigue. If corrosion does occur, have the component fixed before adding any weight, since more fatigue will make it even harder to repair.
Read more: How to Reduce Metal Fatigue | eHow.com http://www.ehow.com/how_10070090_reduce-metal-fatigue.html#ixzz2SbB39ThX