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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