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Man I am tired. I guess that would give me what I need. Dividing by gravity is going to give me a mass value. So this would be right. Thank you. How would I get the propeller efficiency coefficient? Thanks

Sorry about that. Yes the fan is mounted vertically, pulling air from below creating a thrust (Force) reacting at the contact points. The reason, I thought, to divide this thrust by gravity would be to get my value in weight, rather than force.

Yes, I just did not know the required variables needed. I am a young structural engineer, not aerodynamic. I have calculated thrust being F=(mass flow)(air velocity). My calculations provided a value with the units lb-ft/s^2, so I'm assuming I divide this by gravity to get lbm. The answer is...

So, I guess that would be delta p (fan thrust) on the structure. I am not sure what code book to reference. Thank you.

I'm actually talking about the force being applied on the structure at the contact points, due to the fan rotation.

I am trying to find some information on dynamic loading (fan) on a cooling tower structure . Any help would be greatly appreciated. Thank you,

Thank you!

I am a young engineer, and trying to understand the design criteria for Seismic Loading of ASCE 7-10 (Simplified Alternative Design Criteria). For a cooling tower (50ft), how many stories would this be considered. Would this exceed the 3 stories above grade plane? Since this is not an occupied...