Carbon fiber reinforced polymer (CFRP) rod panels (CRPs) emerged as a viable alternative to externally bonded CFRP plates, especially for retrofitting long-span members where splicing is needed to maintain continuity of standard-length plates. CRPs are composed of multiple small-diameter CFRP rods mounted on a fiberglass mesh, forming short-length panels that are seamlessly jointed with a finger joint (overlap) concept. Previous research investigated the panel’s finger joint length (LFG) indirectly through small bond experiments on plain concrete blocks. In this study, large-scale reinforced concrete (RC) beam tests are conducted to evaluate LFG under realistic loading and geometry conditions, considering the effects of curvature and interactions with steel reinforcement. Five RC T-beams were fabricated and tested to failure under a four-point monotonic load. The test matrix includes a control (un-strengthened) specimen and four strengthened ones featuring a specimen bonded to a single (full-length) CRP, and three samples bonded to two half-length (spliced) CRPs with an LFG of 75, 150, and 225 mm. Strengthening with CRP070 resulted in increasing the beam capacity by 68 to 82%, compared to the control beam. Except for LFG = 75 mm where rod slippage occurred in the finger joint, panels with larger LFG didn’t show any distress at the finger joint and behaved in a similar fashion to the full-length panel. An LFG of 150 mm is recommended for CRP070. The rod panel showed acceptable levels of ductility and FRP utilization ratio of 65 to 71%.