Residual deflection

Table 4 Impact Resistance (Residual Deflection (mm) and Cracking by Impact Test) ...

Time elapsed after removing of 100-lb load from the 22-in.-span board The board residual deflection (in.)... 

If the additional residual deflections after the second loading are significant, i.e. more than 5% of the range, the structure should be reloaded until repeatable values are obtained. Should it be impossible to achieve repeatable values, then the structure is being overloaded, leading to damage in some components or in some connections leading to slip. 

Buckling Max. residual deflection at bottom level not to be more than 5 mm 3 nun... 

Residual deflection Permanent deformation after complete or partial removal of applied force on a product, component, structure, etc. 

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