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1. Define the frontal area of the sign

2. Wind Pressure (lb/sf) = 0.013 x (wind speed mph x 0.45)^2

3. Multiply the frontal area of the sign by wind speed to find the horizontal force (in pounds) concentrated at a point defined by the centroid of the area defined in step 1.

4. With known soil properties, use the maximum stress method developed by Broms or Rutledge. The equation used will vary depending if your soil is granular or cohesive.

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14y ago

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