Does anyone here works with Viberating Eqpt Foundation Analysis and Design? I have a machine foundation to design with the main rotar RPM of 3500; I know I need to check resonance in this case. If anyone here works with MathCad and is willing to share a file may please respond to me at fareed_siddique@yahoo.com; I have done some work on this and will appreciate if anyone has a say on this. I will post a MathCad file for this forum when I am done.