Moses
Exodus 38:4ESV·traditional attribution

And he made for the altar a grating, a network of bronze, under its ledge, extending halfway down.

Matthew Henry Presbyterian @wholebiblehenry

Bezaleel having finished the gold-work, which, though the richest, yet was ordered to lie most out of sight, in the tabernacle itself, here goes on to prepare the court, which lay open to the view of all. Two things the court was furnished with, and both made of brass: - I. An altar of burnt-offering, Exo 38:1-7.

Commenting on Exodus 38:1-8

Geneva Bible Notes Reformed @genevanotes

And he made for the altar a brasen grate of network under the compass thereof beneath unto the midst of it. (a) So that the gridiron or grate was half as high as the altar and stood within it.