300/V25 = V300/V50 / V25/V50 = 1.26 = sqrt(1.6) = conversion factor of service level wind velocity to strength design wind velocity.
(V10/V50)^2 / (V1700/V50)^2 = 0.7/1.83 = 0.3825 <= conversion factor of MRI 1700 years wind load to MRI 10 years wind load.
(V10/V50)^2 / (V700/V50)^2 = 0.7/1.6 <= the 1/1.6 factor is conversion of design wind load to service load & 0.7 factor is the conversion of MRI 50 years to MRI 10 years (considered for wind drift check).
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