Cutting a thick steel slab - photo

[Frank S]

My imagination has so many questions about that photo!!!

1. What is the dark rectangle spot on the right end of that big hunk of steel? Is that part hollow?

2. Is that big hunk a "small" part for something REALLY big, or is it the main part of something just sort of big?

3. How much O2 pressure do you need to burn through a hunk that thick?

1 Most assuredly the hunk of steel is not hollow not sire what the spot is, possibly jest the result of rollover from when the slab went through the rolling mil to shape it to height and width

2 the shape resembles a side link to a link chain or roller chain. most likely to be part f a chain for suspension bridge or draw bridge or possibly even a flood gate if you look at the trace templet pattern on the table you can see much of the shape even a pattern for a hole
3 O2 pressure for something that thick might be as high as 150PSI and most likely Natural gas for the fuel but possibly LPG