Exodus 27:3-7

3You shall make pots for it to receive its ashes, and shovels and basins and forks and fire pans. You shall make all its utensils of bronze.

4You shall also make for it a grating, a network of bronze, and on the net you shall make four bronze rings at its four corners.

5And you shall set it under the ledge of the altar so that the net extends halfway down the altar.

6And you shall make poles for the altar, poles of acacia wood, and overlay them with bronze.

7And the poles shall be put through the rings, so that the poles are on the two sides of the altar when it is carried.