Problem 2 (5 pts): Name the two common criteria used for designing nails used to

Question

Problem 2 (5 pts): Name the two common criteria used for designing nails used to connect two wood members. Provide the yield limit equations for single shear connections only for different modes of yielding in a mechanical dowel type fastener (nail) due to crushing, rotation, plastic hinge formation or a combination. Find the reference lateral design value Z in psi for a 20d sinker nail used to connect two wood members, where the side member thickness is 1 G-0.43. inch. The timber is made of Hemlock-Fir with a specific gravity

Explanation / Answer

The NDS recognizes in NDS•7.1.1.4 that “extensive experience” constitutes a reasonable basis for design; therefore, the designer may use Table 7.1 for many, if not all, connections. However, the designer should consider carefully the footnote to Table 7.1 and verify that the connection complies with local requirements, practice, and design conditions for residential construction. A connection design based on the NDS or other sources may be necessary for special conditions such as high-hazard seismic or wind areas and when unique structural details or materials are used. In addition to the conventional fasteners mentioned above, many specialty connectors and fasteners are available on today’s market. The reader is encouraged to gather, study, and scrutinize manufacturer literature regarding specialty fasteners, connectors, and tools that meet a wide range of connection needs

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