American National Standards Institute(ANSI). Single Ply Roofing Industry(SPRI). Approved 6.3.2010. 36 p. This standard provides a method of designing wind uplift resistance of vegetative roofing systems. It is intended to provide a minimum design and installation reference for those individuals who design, specify, and install vegetative roofing systems. It shall be used in conjunction with, or enhanced by, the installation specifications and requirements of the manufacturer of the specific products used in the Vegetative Roofing System.