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.
Skin color changes. Skin color changes: 1  2290 causes: Skin color changes. 2  Introduction: Skin color changes. 3  Skin color changes: Add a 2nd symptom. 4  Skin color changes: Remove a symptom.