Sammo, PC stands for precast
This is painfully basic information... especially if you took the time to read a page back through the thread...
Do your homework before you try to act condescending.
And Calgarian, precast is mainly used as an architectural feature or veneer, what you are probably thinking of is tilt-up construction, which is a form of cast in place... but yeah mainly used for 1-3 storey warehouses and office parks with large laydown areas.