Overturning safety factor calculationsĪre based on the service load combinations only and are calculated inīoth the X and Z directions. ![]() RISAFoundation may provide default input for safety factors, but they need to be reviewed and updated if needed by project EOR per code requirements, foundation types, and project needs. Moments divided by the sum of overturning moments. The overturning safety factor (OSF) is the sum of resisting A comparison of the two methods is provided below. The RISA method is a bit more complicated, but will provide a more realistic representation of the true safety factor versus overturning whenever uplift loads are present. RISAFoundation calculates this value differently than the way many engineers would traditionally approach a hand calculation. This is referred to as the Stability Ratio or the Safety Factor for overturning. One of the important results from any footing analysis is a ratio of the stabilizing moments to the de-stabilizing moments. Footing Stability and Overturning Calculations Footing Stability and Overturning Calculations Calculation of OTM Stability Ratio
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