This experimental investigation was mainly concerned with the evaluation of apparent shear modulus (Gc) of multi-layered polyurethane foam core sandwichbeams using a novel experimental technique. Aiming to this goal, some experimental three-point bending tests were conducted on sandwich beams made up of composite face sheets and multi-layered polyurethane foam cores of differentlayer density. Various core configurations in a stack of three layered core was experimented to study the effect of layer density and core configuration on apparent shear modulus.Priorto actual task, to get more confidence on proposed technique and also to understand the experimental procedure necessary for the present investigation, some samples of single PUF core sandwich beams of known densities were tested to evaluate the shear modulus(Gc) and compared the results with existing results. Series of multi-layered cored beams of different span length and configurations were tested to cater the demand of experimental procedure and to study the effect of layer density and ply order on apparent shear modulus.From the present investigation it is observed that the apparent shear modulus of linearly ordered multi-layered core i.e. core layers arranged in order of lower density to higher density from face sheet of tension side to compression side(configuration-2) could be a better option. Furthermore the apparent shear modulus of linearly ordered multi-layered core sandwich beam was comparatively better than other core configurations and single cored beams of differentcore densities used for multi-layer construction.