Seismic Design of Pile-to-Pile Cap Connections in Flexible Pier Structures Mar, 2012 By Vitaly Feygin, P.E. In Articles, Structural Design Comments 0 This article is currently only available in PDF format, please click the link to the top right. About the author ⁄ Vitaly Feygin, P.E.Vitaly B. Feygin is a Principal Structural and Geotechnical Engineer, Florida Geotechnical Engineering, Inc. Prev Perforated Masonry Walls Next Chapter 13 or Chapter 15?