California Residential Inspector Practice Exam

What should the minimum height of access openings to under-floor spaces be when passing through a perimeter wall?

1. 12 inches

2. 16 inches

3. 20 inches

4. 24 inches

The correct answer is: 16 inches

The minimum height of access openings to under-floor spaces, specifically when they are passing through a perimeter wall, is determined by safety and practical access considerations. The correct answer, which is 16 inches, effectively balances accessibility for inspection and maintenance purposes while minimizing the risk of injury when entering or exiting these spaces. A 16-inch height provides sufficient room for individuals to fit comfortably without having to crouch significantly, thus helping to prevent accidents or strains. Furthermore, this height aligns with the codes and guidelines established for residential construction, ensuring that inspectors and maintenance personnel can effectively access the under-floor areas for necessary inspections or repairs. Larger dimensions, like the options indicating 20 or 24 inches, while they provide more space, may not be necessary for the purpose of access; they can also add unnecessary engineering concerns and construction material costs. A minimum height of 12 inches would likely be too restrictive, potentially limiting safe entry and exit, and is not compliant with current building codes designed to promote safety and practicality.