California IDEX Practice Exam

Where should fasteners be recommended to be placed for wall-hung bookshelves in a residence?

1. 24"

2. 18"

3. 16"

4. 12"

The correct answer is: 16"

The placement of fasteners for wall-hung bookshelves is crucial for ensuring stability and safety, especially when these shelves will support significant weight. Positioning fasteners every 16 inches is generally considered best practice in residential construction. This measurement aligns with the standard spacing of wall studs in most homes, which are typically spaced 16 inches apart on center. By anchoring the fasteners into the studs at 16-inch intervals, you ensure that the weight of the bookshelves—and any items stored on them—is securely distributed, minimizing the risk of the shelves pulling away from the wall. This method also allows for better load-bearing capacity compared to other spacing options, making it a recommended choice for wall-mounted installations in residences.