Closed jackets or properly anchored strips are always preferable compared with open jackets, as in the latter case CFRP premature debonding is usually expected, hence the effectiveness of the CFRP is reduced.
For members subjected to predominantly uniformly distributed loading the design shear force need not to be checked at a distance less than d from the face of the support (in addition it should be verified that the shear at the support does not exceed VRd,max) (Fig. 2-23).