NCIDQ IDFX Practice Exam

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What is the standard stud spacing for commercial wood construction?

16 inches on center
20 inches on center
24 inches on center
30 inches on center

The correct answer is: 24 inches on center

The standard stud spacing for commercial wood construction is typically 24 inches on center. This spacing allows for sufficient structural support while optimizing material use and reducing costs. The wider spacing can also facilitate the installation of insulation and plumbing within the wall cavities, as it provides more room compared to narrower spacings. In many commercial applications, 24 inches on center strikes a balance between structural integrity and the need for larger wall cavities, which is especially beneficial when dealing with insulation or other systems that require space within the walls. This also aligns with standard framing practices to ensure that walls can adequately support loads and resist lateral forces, depending on the structure's specific requirements. While other options like 16 inches and 20 inches on center are common in residential construction, they are not typically the standard for commercial applications, which often prioritize spacing that accommodates greater spans and specific building codes.