Recently,I have gone through a research paper "Strengthening of axially loaded circular concrete columns using stainless steel wire mesh (SSWM) – Experimental investigations" which impressed me most.  In the paper I could not understand some of the calculations.I have studied some of the reference papers, ACI 440 2R-08 , CNR-DT 200/2004. I have some questions that 1) How will I calculate Ultimate strength for 2 wrap SSWM according to CNR-DT 200/2004. 2) What is the equation used for finding Ultimate Compressive strength for no wrap like a value 471 KN. Can any one help me ?