Transverse openings in beams are usually present in building, they are provided for the purposernof allowing the passage of service lines such as sanitary pipes, electric cable ducts, airrnconditioning ducts and telephone lines. The presence of web openings in beams tends to reducernthe flexural and shear strength of the beams. Effect of such openings may even be morerndangerous in reinforced concrete deep beams, because deeps beams like transfer girders wherernthe column is directly supported on them, are in general subjected to a very large concentratedrnload. Since different building codes do not give any provisions regarding RC deep beams withrntransverse web openings and the effect of parameters like degree of interruption of natural loadrnpath, openings size, Aspect ratio of opening sides and compressive strength of concrete on thernbehavior of such types of beams have not been investigated thoroughly. This research attempts tornstudy the effects of the above-listed parameters using a finite element software VECTOR. In thernfirst portion, the finite element model of a Test beam is validated and verified using the results ofrnan experimental test. Results shows that the software accurately predicts the maximum deflectionrnand failure load of the test beams. The error obtained for both cases where under 5%, which isrndoes not exceed the minimum specified tolerance. After the finite element model was validated,rna total 73 of numerical simulation were conducted in an attempt to investigate each of thernparameters mentioned earlier. The output parameters that was interest to this research was failurernload of the test beams, maximum mid span deflection of the beams, cracking load and thernmaximum crack width. Results showed that, when openings are placed within the shear span ofrnthe beam, as the degree of interruption of the natural load path and opening size increases, thernfailure load (shear strength) of the beams drastically decreased and strength reduction as high asrn95% were observed. However, when openings were placed within the flexural region, failurernload of the beams were almost similar to the failure loads of the solid beams without webrnopenings but a considerable increase in deflection as high as 39% was obtained. In addition, thernmagnitude of cracking load decreased when the size of openings located within the shear spanrnincreased. Furthermore, results indicate that, increasing the concrete compressive strength willrnonly be effective in counteracting the strength loss due to web openings when the openings arernsmall (i.e. opening area < 8.59% of the shear span area). For large openings, increasing thernconcrete grade will have insignificant effect on failure load (shear strength of the beam).