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Participating area calculation for Supported Cone roof

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inammanj123

Mechanical
Oct 11, 2013
103
QA
Dear Experts,

For self supported cone roof the required participating area can be calculated by using formula in 5.10.5.2.From that we can get the required size of curb angle.

My question is that do we have to use this formula(5.10.5.2) for supported cone roof,or we can simply select from table in 5.1.5.9

Regards,
Inam
 
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You don't need to mix the requirements applicable to self supported cone roof with requirements of 5.1.5.9 e.

5.1.5.9 e is clear enough saying "Except as specified for open-top tanks in 5.9, for tanks with frangible joints per 5.10.2.6, for self-supporting roofs in 5.10.5, and 5.10.6, and for tanks with the flanged roof-to-shell detail described in Item f below, tank shells shall be supplied with top angles of not less than the following sizes [...]"
 
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