NET

22 Over the heads of the living beings was something like a platform, glittering awesomely like ice, stretched out over their heads.

Darby

22 And there was the likeness of an expanse over the heads of the living creature, as the look of the terrible crystal, stretched forth over their heads above.

KJV

22 And the likeness of the firmament upon the heads of the living creature [was] as the colour of the terrible crystal, stretched forth over their heads above.

Strong's

22 And the likeness^H1823 of the firmament^H7549 upon the heads^H7218 of the living creature^H2416 was as the colour^H5869 of the terrible^H3372 crystal^H7140, stretched forth^H5186 over their heads^H7218 above^H4605.