Place on each side of the wrought iron staircase in which you would like to close off with a baby gate the two long, vertical slats of wood that come with your baby gate installation kit. These slats of wood have two panels and will slip over the wrought iron railings to provide a support structure for the baby gate.
Tighten the bolts or screws connecting the two slats of wood so that they stand firmly across the wrought iron.
Attach the wooden baby gate to each of the wood slat panels on each side of the staircase. To do this, press one side of the gate against one panel. The tension rod will collapse, helping you to ease the gate into place. Place the other end of the gate into the other panel.