Residential Building Inspector Practice Exam

Where can one find the allowable spans for cold-formed steel joists?

1. Table R602.3(5)

2. Table R505.3.1

3. Table R505.3.2

4. Table R502.3.2

The correct answer is: Table R505.3.2

The allowable spans for cold-formed steel joists are found in Table R505.3.2 of the International Residential Code (IRC). This table provides critical information regarding the spacing and sizing of cold-formed steel framing members to ensure structural integrity and safety within residential buildings. Cold-formed steel joists are commonly used in construction for their strength, lightweight properties, and resistance to environmental factors. The specific details in Table R505.3.2 guide builders and inspectors in determining proper span limitations based on the type and load-bearing requirements of the joists, helping to prevent issues like deflection and structural failure. The other tables listed do not relate directly to cold-formed steel joists, as they focus on different materials or types of structural elements covered under the IRC. Understanding the appropriate references is crucial for building inspectors and construction professionals to ensure compliance with code requirements and to maintain the safety and durability of residential structures.