Dear Jennifer :

If you are defining cross section top widths, you need to define the area that you want to treat as storage as "Storage". The remaining area should be defined as a cross section top width.

If you have any additional questions or need any further information, please contact me again.

Sincerely,

Chris E. Maeder, M.S., P.E.
Senior Technical Engineer
chris.maeder@bossintl.com