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Tank Anchorage

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palves

Structural
Joined
Jun 6, 2008
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I'm currently working on a project where I need to design the foundation and anchorage of 4 exterior tanks that store gases such as nitrogen, argon, oxygen, and CO2. These tanks range from 16'-41' tall, 7'-8.5' in diameter, and weigh between 45k-123k. These tanks will be anchored to an exterior foundation at grade level, and will not be connected to any other structure.

I'm trying to find my horizontal Fp force to get my overturning moment, but can't pinpoint if I should be using Ch. 13 (non-structural components) or Ch. 15 (Non-building structures) in the ASCE7. I see that Section 15.7 addresses "Tanks and Vessels" but the design process seems convoluted since I have no experience with it. Dooes anybody have some helpful hints for this design?
 
Based on your description, they would be non-building structures.

It simplifies things if they can be treated as rigid structures, investigate that option.
 
Definitely Non-Building structures...

Design the reactions of the tank legs as pinned to simplify the connections, unless the tank manufacturer says otherwise.

I assume you are not designing the frame to support the tank structure, if there is one.

Mike McCann
MMC Engineering
 
Check the footnotes and the commentary. There are references to special codes for some tanks.
 
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