Conical Roof Calculations

[maneesha0702]

I had modeled a conical roof and I checked the stresses with API 620. The results are way off. Can somebody highlight where I had gone wrong? I had attached RISA model with Hand calculation. The bottom dia is 12 ft and the top dia is 1 ft and the height is 1 ft. The Live load is 25 psf. The thickness of plate is 0.135 inches.

 

[jayrod12]

Saying results are way off doesn't describe what results you are talking about.

Currently in your Risa model, you only have the dead load included in your load combination.