Hold the G-clip square top in hand, allowing the body portion to hang downward.
Fit the body between two bearing bars and lower the unit until the body of the fastener is below the grating bottom.
Slide the unit laterally, allowing it to fit under the structural member flange.
Pull upward on the top of the G-clip, holding upward force.
Tighten the bolt to connect the two parts with a wrench to complete the installation of the G-clip.