For a typical steel framed 30 ft by 30 ft office building bay, the fre-quency will be in the 5-8 Hz range. Frequency is a function of span (the longer the span, the lower the frequen-cy) and weight supported (the heavier the floor and the supported contents, the lower the frequency).
The following medical conditions are some of the possible causes of Skin color changes. There are likely to be other possible causes, so ask your doctor about your symptoms. 1  Causes of skin whitening:  Vitiligo.
What Causes Skin To Turn Green. Introduction. As the medical science reaches greater heights at one side, new kinds of diseases or ailments keep hitting the society on the other side. There are many kinds of skin diseases, and recently I came to learn about an ailment, that resulted in the change of skin color. Last week, my family doctor was visited by a patient, whose complaint was, his skin has got green patches all over. There were no other symptoms. So what could be the possible reason for this green skin?