The Past, Present, and Future of Retractable Roofs Nov, 2004 By Surinder Mann and Bryan Tokarczyk, P.E. In Feature This article is currently only available in PDF format, please click the link to the top right. About the author ⁄ Surinder MannSurinder Mann is a structural engineers at KPFF in Seattle, WA. Prev Fabric Structures in Architecture Next Professional Certification and Beyond