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Underground Storage Tank Structural Integrity

Thread starter jbshuman
Start date Oct 20, 2014

Status: Not open for further replies.

Oct 20, 2014

jbshuman

Mechanical

I need to verify that structural integrity of the secondary containment of a steel double-wall underground storage tank is not compromised after the addition of a 18" x 18" manway installed with self tapping screws and fiberglass mat. (see photo) Specifically that it can withstand a 6" Hg vacuum for 1 hour and other "forces" which I assume to be pressures generated during delivery. How would I show this using a calculation?

http://files.engineering.com/getfile.aspx?folder=8d75b858-652a-4614-bdbc-7186fe9db452&file=double_wall_tank_w._new_manway.png