This a/c ,3925, has the -2 outer cap, although the IPC states it is a -4. After recieving the drawing, it seems the -2 outer cap was installed on 3915 thru 4083. The reenforcment plate were installed by the previous owners due to cracks in the outer caps. This was done sometime around 1979. We have the new inner and outer caps installed without and other discrepancies. This is the 5th beam we have replaced due to sever corrosion.