Trial Design Problems Aug, 2003 By Paul Fratessa In Articles, Editorial This article is currently only available in PDF format, please click the link to the top right. About the author ⁄ Paul FratessaPaul Fratessa is past Chair of the Design Practices Committee of the Business and Professional Activities Division of SEI. He recently retired. Prev The 1981 Hyatt Regency Walkway Collapse Next Casting Concrete Artwork