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I am trying to support 200lb duct on a 14' span. I would prefer to use angle, but am not opposed to channel if it's necessary. My gut tells me 4x4x1/4 is safe, maybe 3x3x1/4. i would like to use beam clamps on the edge of the horizontal leg, but can drill closer to the vertical leg if i gain...

Thanks for the input Tmoose. It is permanent. It is air conditioning duct, so it isn't officially static, but the seismic forces of low velocity duct are pretty minimal.

I do not have an in house engineer.

I am trying to support 200lbs on a 14' span. i am a project manager for a mechanical contractor and am not privy to all the math involved. i would prefer to use angle, but am not opposed to channel if it's necessary. My gut tells me 4x4x1/4 is safe, maybe 3x3x1/4. i would like to use beam...