Once you've removed your internal wall, you may need steel to support the new opening. Steels are placed at the top and bottom of the opening to provide horizontal support. You will also need to box in the steels to provide a finished look and to prevent any potential injuries. nnBoxed steels can also be used to create a decorative feature, such as an archway or niche. If you're unsure about whether or not you need steels, consult with a structural engineer or builder who can assess your situation and offer guidance.