How far must holes bored in joists be from the top or bottom?

The correct distance for holes bored in joists, whether at the top or bottom, is established to maintain the structural integrity of the joists and to prevent any potential weaknesses. The requirement of 2 inches from either the top or bottom of the joist ensures that enough material remains around the hole to support loads and resist shear and bending forces.

When holes are placed too close to the edge, there is a risk of compromising the joist's strength, which can lead to structural failures. This standard reflects best practices in construction and engineering, providing a buffer zone that helps protect the functional capacity of the joist. Following this guideline not only enhances safety but also aligns with building codes commonly adopted in the industry. Thus, maintaining a distance of 2 inches is essential for ensuring the long-term performance and safety of the structural framework.