the part of iso 16936 specifies requirements and a test method for security glazing designed to resist impacts of a hard body by delaying access of objects and/or persons to a protected space for a short period of time this part of iso 16936 classifies security-glazing products into categories of resistance to repetitive impacts of a steel sphere. In this part of iso 16936, the categories of resistance have not been assigned to special applications. Glazing classification should be specified on an individual basis for every application. This part of iso 16936 deals with mechanical resistance to impact only. Other properties can also be important