1.1 It is recommended to periodically evaluate the existing condition of structural sealant glazing (hereinafter called SSG) installations in situ to detect problems before they become severe or pervasive. Evaluation of existing SSG installations are required by certain building codes and local ordinances. This guide provides a program to evaluate the existing conditions, lists typical conditions which might be found, and suggests times when such evaluations are appropriate. The committee with jurisdiction over this standard is not aware of any comparable standards published by any other organizations.