The spherical head or other appropriate device ensures uniform contact along the edge of the plate, thus eliminating eccentric loading. When 1 kip or less of compressive load is applied, the slip gages should be engaged or attached. The test should be terminated when a slip of 0.05 in. 3.4 Slip Load Typical load-slip response is shown in Fig. Slip load is the maximum load, provided this maximum occurs before a slip of 0.02 in. is recorded.
Slip load is the load at which the slip rate increases suddenly.
Slip load is the load corresponding to a deformation of 0.02 in. This definition applies when the load vs. slip curves show a gradual change in response. The mean slip coefficient for both sets of five specimens must be compared. The mean and standard deviation of the data from all specimens tested define the slip coefficient of the coating. Other test methods to determine slip may be used provided the accuracy of load measurement and clamping satisfies the conditions presented in the previous sections.