I want to add a new section database in STAAD.Pro for my company. Can I do that ?

The section profile databases are stored as mdb files as part of the software installation within the Sections folder ( for example C:\SProV8i SS6\STAAD\Sections ). You can always modify sections in existing databases or add new sections to the existing databases and that can be done by using the menu option Tools > Browse/Modify Section Database from within the GUI. For doing that you do not need to create a new database.

Details on how to add a section to an existing database is available at http://communities.bentley.com/products/structural/structural_analysis___design/w/structural_analysis_and_design__wiki/18558.how-to-add-a-new-section-to-the-staad-section-database

However if you still need to add completely separate database for your company, it is possible but you should keep the following points in mind.

To create any user defined mdb, one has to copy an existing mdb for a particular country to begin with and then modify it. Creating an mdb from scratch will never work.

When one opens a mdb file, one can modify the data and add data into any of the available tables but one cannot add new tables. For example within a particular mdb, one can add new sections as part of the Angle Table but cannot add a new table like say Double Angle or Star Angle.

As a final step, one can go to the Configuration > Section Profile Table dialog box and click on the row for Database Names, corresponding to the appropriate country, to identify the new User Database as the data base to be used for that country. No need to use the option Install Custom table for that.

One also needs to have read and write access to the Sections folder.