I AM REGULAR USER OF TANK SOFTWARE. I WISH TO KNOW HOW THE ROOF LOAD IS TRANSFERRED TO THE SHELL? API CODE IS SILENT ABOUT THE ROOF LOAD TRANSFER TO SHELL. IS THE LOAD OF ROOF IS TRANSFERRED TO SHELL PLATE AS PER THE DESIGN GUIDELINES AS PER API?

CAN FELLOW ENGINEERS CAN CLARIFY?

Good morning,

I obtained this output report:

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..................TANK - Roof Design/Analysis Data

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......User Specified Design Roof Load .......(KPa ): 1.8158
......(including user plate thickness)
......Computed Design Roof Load .............(KPa ): 0.50145
......(including user plate thickness)


Please, Can you clarify me the difference between “User Specified Design Roof Load” and “Computed Design Roof Load” ?