Dear Sir,   Please explain briefly. What is the value in assigning Area Spring? Direction is Local Axis-3. According to my friend, this value is depending on the bearing capacity(B.C) of soil. For example, for 2.24 ksf of B.C, this value is 2.24 x12 = 26.88, he said. But, I am not  sure about this value and reason. So, explain briefly for my question.   With bundle of thanks, Aung Myat thu MilLimetRe-training & Design Group Taunggyi, Sha