No mention is made concerning concrete in the installation manual , you may wish to contact the manufacturer at 877-214-4470 for additional information.
Mark H.
Unfortunately, customer sizes are not available.
Mark H.
The door is rated for 2300 degrees Fahrenheit for 1 hour. You can find the full installation instructions here: https://press.hornady.com/assets/pcthumbs/tmp/1410993781-SnapSafe-Vault-Door-Instructions.pdf
Hornady says:
"At this point both safes are only offered as RH inswing doors."
Mark H.
These doors are 5" thick not counting the hinges inside, 6.3" including the hinges. You can find the full dimensions of the 36" model here: https://press.hornady.com/assets/pcthumbs/tmp/1410994634-SnapSafe---36--Vault-Door-Dimensions.pdf and the 32" model here: https://press.hornady.com/assets/pcthumbs/tmp/1410994633-SnapSafe---32--Vault-Door-Dimensions.pdf