The fibre reinforced polymer (FRP) composites is a new technology for strengthening the reinforced concrete (RC) beams in the shear area, which has gained considerable importance. Most of the current design models that predict shear loading capacity was obtained based on a number of specimens from small to medium-scale dimensions so sometimes these models lead to excessively inaccurate results and need to be validated with a sufficient number of experimental tests at a large-scale dimension. The aim of this work is to assess some of the current design models used to predict the shear load capacity of RC beams with large-scale dimensions that strengthened in the shear zone with externally bonded FRP sheets. Therefore, to verify the accuracy of the existing models, the performing of six RC beams with larger-scale dimensions were analyzed to study the effect of the new variables such as beam size, beam width, and a new type of FRP sheets (basalt FRP (BFRP)). The results indicate that the model suggested by Sayed et al. [6] can predict the shear capacity of RC beams strengthened in the shear zone with BFRP sheets with an economical design along with higher accuracy and higher material efficiency than the other existing models. The model provides a good prediction of the shear load capacity when it considers the width of the beam as well as the effect of shear span to depth ratio.