Wind lift on a small platform

[Ngiri]

I need to calculate the wind speed required to lift a small flat unsecured scaffold platform 2'x 8' with a self weight of 30lb and supporting a load of 150lb positioned 1' in from one end. The scaffold is an open tube structure. I have approached this with wind loading for buildings calcs but I am uncertain that these are applicable to such a small surface. Any advice wecome!

 

[insideman]

Some very rough calcs shows that lift should be about .002 V^2 sin A. A is angle of attack, V is speed in feet per second.

With total weight of 180 #, you can figure out the rest.