And you shall set it under the ledge of the altar so that the net extends halfway down the altar.
As God intended in the tabernacle to manifest his presence among his people, so there they were to pay their devotions to him, not in the tabernacle itself (into that only the priests entered as God's domestic servants), but in the court before the tabernacle, where, as common subjects, they attended.
Commenting on Exodus 27:1-8
And thou shalt put it under the compass of the altar beneath,.... That is, the grate was to be put within the square compass of the altar, in the hollow part of it, for the wood and sacrifice to be laid upon it: that the net may be even to the midst of the altar; and as the altar was three cubits high, this net...
put it under the compass of the altar beneath--that is, the grating in which they were carried to a clean place (Lev 4:12).