What is the largest mortar size that can be put in a rack vs buried?

[pv8man]

Hi everyone, fresh account here from Indiana.

I have graduated from 6 inch to 10 inch mortars this upcoming 4th of July.
Could a 10 inch be put in a rack or does it have to be buried?

Is there a safe alternative to burying it?

Any advice would be appreciated. :)

[minute_man777]

Based off of the various display videos I've watched, any mortar size greater than 6 inches needs to be either buried in the ground or put in a 55 gallon drum filled with dirt/concrete. If you end up putting them in the ground, be prepared to have a way to yank the mortar out of the ground as the shells powerful lift charge will jam it even tighter into the ground.

[displayfireworks1]

My video from 2010 showing 8 inch racks. I did see 10 before using a rack of two.
At 4:22 in the video. I have it on this link
https://youtu.be/lfu-PAGgSbQ?t=262

[jknepp1954]

My video from 2010 showing 8 inch racks. I did see 10 before using a rack of two.
At 4:22 in the video. I have it on this link
https://youtu.be/lfu-PAGgSbQ?t=262

Even though someone used a 10" RACK = i would highly recommend NOT doing that. 8" rack is bad enough.

[Scotty Rockets]

8” per NFPA can be racked if e-fired otherwise buried. 10” and above MUST be buried or in a drum with sand.