North Carolina Building Contractor License Practice Exam

When using arch joists, what is the minimum bearing required on wood or metal?

1. 1/8 inch

2. 1/4 inch

3. 1/2 inch

4. 3/4 inch

The correct answer is: 1/4 inch

The correct answer is 1/4 inch, which is the minimum bearing required for arch joists on wood or metal. This specification is vital in ensuring stability and support for the joists, allowing them to carry the loads they are designed for. A minimum bearing of 1/4 inch helps to avoid excessive stress on the joists where they bear on the supporting structure, reducing the risk of failure or deformation over time. This requirement is derived from building codes and standards that take into account the structural integrity necessary for different types of framing, including arch joists. Proper bearing is essential for distributing loads evenly and preventing issues such as tilting or excessive movement, which could compromise the overall safety of the structure. Understanding these specifications is crucial for contractors and builders, as they must ensure that their work meets local building codes and standards to maintain compliance and ensure the safety of the structures they are constructing or renovating.