The load-displacement results of pulling out tests are shown in Figure 16. When compared to the standard Bolt Type T2 (profile spacing 12.5 mm), all other bolts experienced an increase in the average maximum peak load capacity. Of more significance was the increase in loading capacity of both Bolt Types T2G2 and T2G3 respectively. The average peak load of the T2-G2 bolts with profile spacing of 37.5 mm was 69% greater than that of the standard Bolt Type T2. Similarly for the Bolt Type T2G3, with 50.0 mm profile spacing, there was an increase of 61% with respect to Bolt Type T2.