Resumen-Este trabajo realiza un estudio comparativo de caracterización de vigas de madera aserradas y su comparación con la normativa. Para ello se ha utilizado dos tipos de madera muy diferentes, una muy heterogenea, con gran número de defectos, y otra muy homogénea, para comprobar la influencia de los nudos en el comportamiento mecánico de la madera. Para ello se han ensayado un total de 18 vigas de madera y 5 probetas a compresión. Posteriormente se ha realizado una comparativa con la normativa de caracterización, para comprobar su grado de definición. Se ha podido comprobar que dicha norma, se encuentra en el lado de la seguridad en el ámbito de las resistencias, pero que su definición es escasa en cuanto al módulo de elasticidad de la madera.
Palabras clave-Madera; UNE-338; vigas.Abstract-This work makes a comparative study of the characterization of sawn timber and its comparison with the standard. For this purpose, two very different types of wood have been used, one very heterogeneous, with a large number of defects, and a very homogeneous one, to verify the influence of the knots on the mechanical behavior of the wood. To this end, a total of 18 wooden beams and 5 test specimens have been tested. Subsequently a comparison has been made with the standardization of characterization, to verify its degree of definition. It has been possible to verify that this norm, is in the side of the security in the field of the resistances, but that its definition is scarce as far as the modulus of elasticity of the wood.
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