Regulations require that anything five feet or more in height must be secured in order to avoid injury to personnel. Items less than five feet are exempt if the supporting base is 2/3rds of the height.

Ideally these items are anchored to the wall studs or into the floor. When possible, this is done from inside the piece using "hi-lo" screws with fender washers.

When the location or construction of the item prohibits this method, inverted "L" brackets are used. Aesthetically, either method usually keeps the materials from view.