Enter the factor the saddle reaction force due to the Wind or Earthquake transverse load. The recommended value is three (3).
The value of six (6) is conservative in that it assumes that the maximum edge load is uniform across the entire base, when, in reality, it occurs only at the edge. A more accurate method is to convert this triangular loading into a more realistic uniform load, which leads to a value of 3. The following illustration shows the end view of a horizontal vessel with a transverse load, simulating Wind/Seismic loading:
The saddle reaction load Fst (or Fwt for wind) due to the transverse load Ft is: Fst (or Fwt) = ftr * Ft * B / E.