Andiron
An andiron, firedog, fire-dog, fire dog, iron-dog, or chenet is a bracket support, normally one of a pair, on which logs are laid for burning in an open fireplace, so that air may circulate under the firewood, allowing better burning and less smoke. They generally consist of a tall vertical element at the front, with at least two legs. This stops the logs from rolling out into the room, and may be highly decorative. The other element is one or more low horizontal pieces stretching back into the fireplace and serving to hold the logs off the bottom of the fireplace. An andiron is sometimes called a dog or dog-iron.
Read on Wikipedia