Exodus 27:3-7

3And thou shalt make its pots to cleanse it of the fat, its shovels, and its bowls, and its forks, and its firepans; for all the utensils thereof thou shalt employ copper.

4And thou shalt make for it a grating of network of copper; and on the net shalt thou make four copper rings at its four corners;

5and thou shalt put it under the ledge of the altar beneath, and the net shall be to the very middle of the altar.

6And thou shalt make staves for the altar, staves of acacia-wood, and overlay them with copper.

7And its staves shall be put into the rings, that the staves may be on both sides of the altar, when it is carried.