03-07-2010, 07:13 AM
I am not really understand what is your problem for the 1st question.
Regarding to the 2nd question, if ur project is Pile Foundation then it's better for u to assign as pin support. However, if the given result is more than ur pile capacity then u should assign it as spring since it's much realistic. In our company, we used to assign pile as spring. (Recommended by CSI ETABS Trainner)
For fixed support, u can assign it when u are designing common pad/ combined footing..
Regarding to the 2nd question, if ur project is Pile Foundation then it's better for u to assign as pin support. However, if the given result is more than ur pile capacity then u should assign it as spring since it's much realistic. In our company, we used to assign pile as spring. (Recommended by CSI ETABS Trainner)
For fixed support, u can assign it when u are designing common pad/ combined footing..