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Rectangular Tank Design Horizontal Stiffener Calculation and Skid Design Method

Rectangular Tank Design Horizontal Stiffener Calculation and Skid Design Method

Rectangular Tank Design Horizontal Stiffener Calculation and Skid Design Method

(OP)
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!

RE: Rectangular Tank Design Horizontal Stiffener Calculation and Skid Design Method

(OP)
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!

RE: Rectangular Tank Design Horizontal Stiffener Calculation and Skid Design Method

timagatep, Google is your friend :)

Regards,

Mike

RE: Rectangular Tank Design Horizontal Stiffener Calculation and Skid Design Method

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.

RE: Rectangular Tank Design Horizontal Stiffener Calculation and Skid Design Method

(OP)
Chicopee,

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

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