ResumenEl presente trabajo trata sobre la determinación de cargas admisibles para uniones con clavos de caña lisa y helicoidal, sometidas a simple y doble cizallamiento en madera de Ceiba samauma (huimba), Matisia bicolor (machin zapote) y Matisia cordata (zapote); observándose una ventajosa diferencia por el uso del clavo de caña helicoidal. Los ensayos y cálculos respectivos se efectuaron de acuerdo a las consideraciones de la Norma ASTM D-1761-74 y la Sección de Construcciones Forestales del Departamento de Industrias Forestales. Asimismo se discute el comportamiento de las uniones estudiadas, analizando sus cargas máximas a través del experimento factorial 3A2B2C, bajo un diseño completamente randomizado.Palabras clave: uniones clavadas; cizallamiento; Bombacaceae; clavo caña lisa; clavo helicoidal. AbstractThe present work is about the determination of the allowable loads for joints of plainshank and helically nails that were evaluated in simple and double shearing for woods Ceiba samauma (huimba), Matisia bicolor (machin zapote) and Matisia cordata (zapote); the results indicated that the best perfomance was the helically nail. The study and calculations were made in accord with the considerations of the ASTM D-1761-74 Norm and the Forestry Construction Section of Forestry Industry Departament. Moreover, the joints behaviour are discussed, making an analysis of their maximum loads by the factorial experiment 3A2B2C in a completely random design.
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