Use the following links to download the spreadsheets:
Spreadsheet for Columns With Axial Loads Only
Spreadsheets for Columns with Uniaxial Bending along with Axial Loads
Spreadsheet for Columns with Biaxial Bending along with Axial Loads
Details on how to use and modify the spreadsheets shall be shared in some time.
Please prompt for bugs if any...
Thanks