Rectangular Tank Design Horizontal Stiffener Calculation and Skid Design Method

[timagatep]

Hello,

I know there is a method for designing rectangular tanks under hydrostatic pressure. I have used the pressure vessel handbook, among other documents for reference. However, I am stuck on how to compute the correct angle sizing for the tanks. On the examples, the process shows how to calculate the minimum required moment of inertia (in.^4) and then shows the dimensions of an angle that may be used. I am unsure of how they got the dimensions for a specific size of angle solely based on the minimum moment of inertia. I'm sure it has something to do with Roark's formulas, but I have been going crazy looking for other examples.

I am also wondering if there is a standard way of designing a skid for a rectangular tank that will be used in the field. There are alot of custom skid designing companies out there, but I wanted to know if there is a simple calculation procedure, based on the rectangular tank design, that can be followed.

I appreciate all help and information to pointing me in the right direction. Thanks!

 

[SnTMan]

timagatep, you could look it up:

http://www.engineeringtoolbox.com/steel-angles-d_1322.html

Can't help on the skids, I'm afraid

Regards,

Mike

 

[timagatep]

Hello Mike,

Thank you very much for the help! I figured there was some standard table for angles but could never get my hands on it. This will greatly help the project I am currently undergoing. For the skid design, I am looking a steel pallet design. Thanks again!

 

[SnTMan]

timagatep, Google is your friend

Regards,

Mike

 

[chicopee]

I would rather use a T bar or two angle bars side by side which would have its shear center thru the middle of the T than using an angle iron which has its shear center outside the right angle configuration. an angle iron will tend to twist because of the position of the shear center.

 

[timagatep]

Chicopee,

Thanks for the input, I will look into those alternative stiffeners as well.