The vertical deflection of the joint of a perfect frame (δv) is given as
1
\(\sum \frac{\mathrm{pv} l}{\mathrm{E}}\)
2
\(\sum \frac{1.5 \mathrm{pv} l}{\mathrm{E}}\)
3
\(\sum \frac{2 \mathrm{pv} l}{\mathrm{E}}\)
4
\(\sum \frac{\pi \mathrm{pv} l}{\mathrm{E}}\)