North Carolina Building Contractor License Practice Exam

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What percentage of the specified yield strength must mechanical connections achieve?

The correct answer is: 12%

Mechanical connections in construction and structural applications are critical for ensuring the integrity and safety of the building's framework. In North Carolina, as well as in various building codes, it is specified that mechanical connections must achieve a specified percentage of the yield strength of the materials being connected. Achieving 12% of the specified yield strength is a common requirement. This percentage is formulated based on a balance between strength and flexibility, ensuring that materials remain structurally sound while accommodating potential movement or load variations over time. This standard helps to provide a margin of safety in the structural design and construction, which is essential for preventing structural failures and ensuring longevity. By adhering to this percentage, builders and contractors can ensure that mechanical connections provide adequate resistance and support for the loads they will encounter throughout the building's lifespan. This requirement aligns with best practices in the industry, promoting safer construction methods and better structural performance.