In the present paper the results of an experimental study for the mechanic characterization of clay tile masonry walls under shear forces are discussed. Further in the paper the reliability of the models for the prediction of the mechanic characteristics under shear forces proposed by some codes is verified. Diagonal tests have been carried out; then the relationship of the Italian and European codes, correlating the mechanical properties of the components and the normal compression mechanical property of masonry to its shear mechanical properties (strength and elastic modulus), have been verified. This control has requested also normal compression tests on masonry walls made of the same blocks used for diagonal tests, on the blocks themselves and on the used mortar.
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