To copy the table structure, follow these steps:
Right-click the existing table name in the Database Window of the original database and click Copy.
Close the database Window and open your new database.
Under Objects, click Tables. Then, right-click the database Window and click Paste.
Enter a name for the new table, choose Structure Only, and then click OK.
When you open the new table in Design view, it will have the exact same table structure as the original. Now you can now make any changes to the table structure to customize it to fit your needs.