Exodus 27:4

“And thou shalt, make for it a grate of network of brass, etc.] Or “sieve”, as in (<300909>Amos 9:9), it was a plate of brass with holes in it, to let through either the blood that drained from the parts of the sacrifice, or the ashes of it; for this was the focus or hearth, on which the sacrifice and the wood were laid and burnt: this, according to the Targum of Jonathan on (<023804>Exodus 38:4) was to receive the coals and bones which fell from the altar: and so may denote the purity of Christ’s sacrifice, which was offered up without spot to God, and the use of him as the altar to sanctify our gifts, and take away the sins of our holy things: and upon the net shalt thou make four brazen…”

“a grate of network of brass--sunk latticework to support the fire. four brazen rings--by which the grating might be lifted and taken away as occasion required from the body of the altar.”

“(Compare Exodus 38:1-7.) The great altar which stood in the court immediately in front of the tabernacle was commonly called the altar of burnt-offering, because on it were burnt the whole burnt-offerings, and all those parts of the other animal sacrifices which were offered to the Lord. It was also called the brazen altar, because it was covered with bronze, in distinction from the golden altar or altar of incense Exodus 39:38-39; Exodus 40:5-6. Exodus 27:2 His horns shall be of the same - These horns were projections pointing upward in the form either of a small obelisk, or of the horn of an ox. They were to be actually parts of the altar, not merely superadded to it. On them the blood of…”

“The grate was set into the hollow of the altar, about the middle of it, in which the fire was kept, and the sacrifice burnt; it was made of net - work like a sieve, and hung hollow, that the fire might burn the better, and that the ashes might fall through. Now, this brazen altar was a type of Christ dying to make atonement for our sins. Christ sanctified himself for his church as their altar, Joh 17:19, and by his mediation sanctifies the daily services of his people. To the horns of this altar poor sinners fly for refuge, and are safe in virtue of the sacrifice there offered. Exodus 27:9”

“a grate of network: Exo 35:16, Exo 38:4, Exo 38:5 rings in the four corners thereof: Exo 25:12 Exodus 27:5”

“The altar was to have מכבּר a grating, רשׂת מעשׂה net-work, i.e., a covering of brass made in the form of a net, of larger dimensions that the sides of the altar, for this grating was to be under the "compass" (כּרכּב) of the altar from beneath, and to reach to the half of it (half-way up, Exo 27:5); and in it, i.e., at the four ends (or corners) of it, four brass rings were to be fastened, for the poles to carry it with. כּרכּב (from כּרכּב circumdedit) only occurs here and in Exo 38:4, and signifies a border (סבבא Targums), i.e., a projecting framework or bench running round the four sides of the altar, about half a cubit or a cubit broad, nailed to the walls (of the altar) on the outside,…”