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 __   _     _____    __   _     ______    _  __  
| || | ||  |  ___|| | || | ||  /_   _//  | |/ // 
| '--' ||  | ||__   | '--' ||   -| ||-   | ' //  
| .--. ||  | ||__   | .--. ||   _| ||_   | . \\  
|_|| |_||  |_____|| |_|| |_||  /_____//  |_|\_\\ 
`-`  `-`   `-----`  `-`  `-`   `-----`   `-` --`

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Text this: A simple design tool for the calculation of effective section area for class 4 open section using MS-excel