What is C-profile rung?

A C-type rung, also called a C-profile rung or
C-channel rung, is a formed cable ladder rung with a C-shaped cross-section.
The profile uses a tall vertical web with short upper and lower return lips, giving the rung better
bending stiffness than a flat strip of the same material thickness.

This rung profile is used across the width of the cable ladder to support cables and transfer load into
the side rails. The open C shape also helps reduce weight while keeping the section rigid.