The formula to calculate the Rivet Length is:
\[ RL = T1 + T2 + 1.5 \times D \]
Where:
Rivet length is the total length of a rivet needed to fasten two materials together. It is calculated by adding the thicknesses of both materials and one and a half times the diameter of the rivet stem.
Let's assume the following values:
Using the formula to calculate the rivet length:
\[ RL = 0.5 + 0.75 + 1.5 \times 0.25 = 1.625 \text{ in} \]
The rivet length is 1.625 inches.