North Carolina Building Contractor License Practice Exam

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What is the maximum span of 2x6 purlins?

10 feet
12 feet
14 feet
16 feet

The correct answer is: 16 feet

The maximum span of 2x6 purlins is indeed typically around 16 feet. Purlins are structural members that support roof loads and are installed horizontally. The span of a purlin largely depends on the load it bears, which includes factors such as the type of roofing material and local weather conditions, but a common guideline for 2x6 lumber in a residential context often allows for spans up to 16 feet, when adequately supported and loaded. When planning construction, it’s critical to consider both local building codes and the specifics of the materials being used, ensuring compliance with safety standards and structural integrity. Structural calculations should always be made with the assistance of an engineer or architect to ensure that spans and loads align with the expected usage of the building.