Wind Design Standard for Edge Systems Used with Low Slope Roofing Systems

SPRI first unveiled the ANSI/SPRI ES-1, "Wind Design Standard for Edge Systems Used With Low Slope Roofing Systems" Design Standard in 1998. ANSI/SPRI ES-1 was incorporated into the International Building Code in their 2003 Edition (IBC 2003), when compliance with ANSI/SPRI ES-1 became a building code requirement.

An excerpt from the official ANSI/SPRI ES-1 documentation begins: The following standard is a reference for those who design, specify or install edge materials used with low slope roofing systems. This Standard focuses primarily on design for wind resistance. Nevertheless, it does address corrosion as well as fascia thicknesses that lead to satisfactory flatness. It is intended for use with the specifications and requirements of the manufacturers of the specific roofing materials and the edge systems used in the roofing assembly, excluding gutters. The membrane manufacturer shall be consulted for specific recommendations for making the roof watertight at the edge.

This design standard addresses copings and horizontal roof edges, and the following factors shall be considered in designing a roof edge.

Structural integrity of the substrate that anchors the edge (e.g. nailers)
Wind resistance of the edge detail
Materials specifications