How far down to you have to go to get under a building foundation??
Basically how many feet and then also what temps do you need to get to too melt steel?
Finally if underground how long can you stay below the surface and do you need breathing equipment?
Thanks
Basically how many feet and then also what temps do you need to get to too melt steel?
Finally if underground how long can you stay below the surface and do you need breathing equipment?
Thanks

