Formula
The chain sag is calculated using:
$$\text{Chain Sag} = \frac{w \times L^2}{8 \times T}$$
Where:
- w = Weight per unit length
- L = Length of span
- T = Total tension
Example
Given:
- Weight = 35 lb/in
- Span = 10 in
- Tension = 50 lb
Calculation:
$$\text{Chain Sag} = \frac{35 \times 10^2}{8 \times 50} = \frac{35 \times 100}{400} = \frac{3500}{400} = 8.75 \text{ inches}$$
The chain will sag 8.75 inches under these conditions.