IX calculation in staad

Question

Sir i want to know how staad calculate Ay,Az and Ix(torsional moment of inertia) in case of Tsection. 
 EXAMPLE: TSECTION given in attachement 
 Kindly please any one who can fill the blank box and send me the solution how it is calculated. I have many times mail to bentley but they use to give a big templete but this time i hope.

Sye · Answer

To get the software to calculate the values, you can define the section as shown next 
 
 This would be good for the analysis. However if you would like the section to be designed as well, you may consider noting down the properties and defining it as user defined Tee section ( using User table as you suggested in your screenshot ). 
 You can check the cross section properties by clicking on the Values button in the above screenshot or you can ask for the properties to be printed in the analysis output file by including the command PRINT MEMBER PROPERTIES LIST x in the input command file, where x represents the member number to which the property is assigned to.

Kris Sathia · Answer

You can find the formulae for finding the torsional constant "J" for various shapes in the textbook 
 
Roark’s Formulas for Stress and Strain by 
 
WARREN C. YOUNG 
RICHARD G. BUDYNAS 
 
Finding the areas associated with shear deformation is more difficult. In Timoshenko's Mechanics of Materials, there is a chapter on this topic. For some shapes like rectangular, he provides the shape factor for multiplying the full cross section area to determine the effective area for shear deformation. 
 
For tee shapes, for AY, you could consider an approximate rectangular section by taking the full cross section minus the outstanding parts of the flanges and then apply Timoshenko's factor to the resulting area. Similary, for AZ, consider the flange alone as a rectangular section. 
 
There is also a well known publication named 
 
The Shear Coefficient in Timoshenko’s Beam Theory 
 
by 
 
G.R.Cowper 
 
that should be useful to find this information.