Exodus 27:1-8 (NKJV)
¹  “You shall make an altar of acacia wood, five cubits long and five cubits wide–the altar shall be square–and its height shall be three cubits.
²  You shall make its horns on its four corners; its horns shall be of one piece with it. And you shall overlay it with bronze.
³  Also you shall make its pans to receive its ashes, and its shovels and its basins and its forks and its firepans; you shall make all its utensils of bronze.
⁴  You shall make a grate for it, a network of bronze; and on the network you shall make four bronze rings at its four corners.
⁵  You shall put it under the rim of the altar beneath, that the network may be midway up the altar.
⁶  And you shall make poles for the altar, poles of acacia wood, and overlay them with bronze.
⁷  The poles shall be put in the rings, and the poles shall be on the two sides of the altar to bear it.
⁸  You shall make it hollow with boards; as it was shown you on the mountain, so shall they make it.