Andirons are horizontal iron bars across which logs are laid in an open hearth to facilitate burning. Essentially, these iron devices have been replaced by plate steel or aluminum fire grates which are often found in prefabricated masonry fireplaces today. In past, andirons might also In older eras (e.g. 16th to 18th century AD) andirons were also used as a rest for a roasting spit or may have a cup-shaped top to hold porridge.