80/20 Deflection Calculator

Calculate Deflection in an 80/20 Beam







Formula

The formula to calculate the deflection in an 80/20 beam (D) is:

\[ D = \frac{5 \cdot W \cdot L^4}{384 \cdot E \cdot I} \]

Where:

What is 80/20 Deflection?

An 80/20 deflection refers to a principle in structural engineering where a structure or material is designed to withstand up to 80% of its maximum load capacity, leaving a 20% margin for safety or unexpected additional stress. This principle ensures that structures are not operating at their maximum capacity, thereby reducing the risk of failure or collapse. The term "deflection" refers to the degree to which a structural element is displaced under a load.

Example Calculation

Let's assume the following values:

Using the formula:

\[ D = \frac{5 \cdot 500 \cdot 100^4}{384 \cdot 10,000,000 \cdot 50} \approx 1.3021 \text{ inches} \]

The deflection of the beam (\(D\)) is approximately 1.3021 inches.