Exodus 27:5

Midst. Hanging down half way. On this, the wood designed to consume the victim, was placed. The Septuagint and Vulgate refer which to the rings, and the present Hebrew refers to the grate, or net. But it seems to be inaccurate. The rings were fixed about the middle of the altar's height, to the same holes, through which the bars intended for its removal were put. The altar stood upon feet, which took up half the height, and let in air below the grate, to fan the fire, and to prevent the brass from melting. All the altars described in the table of Isis, are of this nature. (Calmet) --- The Septuagint do not distinguish the grate from the hearth, or little altar, ( arula) as they use the word hearth, escharaboth, (ver. 4. and 5,) and place it about the middle of the altar, or where the feet supported the box or frame of the altar, which was almost a yard high. The hearth may therefore denote the bottom of the frame, where the grate was suspended by four rings.