As shown in Figure 4 (a) for the RC beam specimens
strengthened with a single GFRP rod, the groove was located
at center of the soffit. For the RC beam specimens
strengthened with two rods, as shown in Figure 4 (b), the two
GFRP bars were arranged where the distance between the two
GFRP bars fitting in the grooves is 43.5 mm and the distance
between the edge of RC beam member and the groove
containing GFRP bar is 31 mm. The groove which is already
fitted with GFRP bar was covered with epoxy paste. The
curing continued after the installation of the GFRP rod/s.