A. Lokaj et alii, Frattura ed Integrità Strutturale, 39 (2017) 56-61; DOI: 10.3221/IGF-ESIS.39.07 59 The mechanism of failure depends on the geometry of the connection and the properties of the construction materials, particularly on a plastic torque of dowel and tensile deformation of the wall of dowel hole in the case of timber or wood- based material [9, 10]. From equations for determining the load carrying capacity of the connecting means it is evident that calculation for determining the load carrying capacity of connections depends on characteristics of wood density and thickness of the timber embedding the bolt. The decisive parameter is the diameter of the bolt and the material embedment strength [11]. R ESULTS he test results of bolt connections of the squared and round timber with embedded steel plates laterally loaded at different angles to the grain give similar values of resistance, which are higher than the load capacity determined according to the Eurocode 5. It means that the equations for determining the resistance of joints Eurocode 5, which were derived for squared timber, can be applied to the joints of round timber. Figure 3 : Comparison of the test records of squared timber samples loaded in tension at different angles. Figure 4 : Comparison of the test records of round timber samples loaded in tension at different angles. T

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