Chapter 13 or Chapter 15? Mar, 2012 By Dain M. Hammerschmidt, P.E. and Nicholas D. Robinson, P.E. In Articles, Codes and Standards Comments 0 Are You Using the Wrong Loads? This article is currently only available in PDF format, please click the link to the top right. About the author ⁄ Dain M. Hammerschmidt, P.E. Prev Seismic Design of Pile-to-Pile Cap Connections in Flexible Pier Structures Next What’s Happened to Seismic Isolation of Buildings in the U.S.?