Understanding Joist Forces (Tension & Compression)

What happens here

It is crucial to understand the forces acting on a joist when a load is applied. When weight is placed on a joist, the top portion experiences compression (being pushed together), while the bottom portion experiences tension (being pulled apart). Any notching on the bottom of a joist is particularly dangerous because it directly interferes with the joist's ability to resist tension, which is a critical force for maintaining structural integrity under load. Always consult local building codes before making any modifications to structural members.

Goal: Recognize how loads affect joists and the significance of tension and compression zones.