Some of the factors associated with joint or fixing weaknesses include degraded strength of the bonding material caused by low temperature, frost, or when contaminants infiltrates into the joint.
Another cause of poor surface bonding strength is as a result of smooth side walls.
The entire strength of the whole structure may be weaker so as to loose the integral strength of the structure due to the vital bonding materials fail. Ultimately, this may result in construction malfunctions leading to disastrous consequences.
Pullout Testing enables early diagnosis of such problems. Because of this, construction engineers can repair faults. Early fault detection mitigates future higher costs, it also gives an assurance of the overall strength of any fixings.