On Mon, 15 Jun 2009 11:29:59 -0700, "Calif Bill"
wrote:


"Vic Smith" wrote in message

I imagine they use lasers for such cuts now, but don't know.

--Vic

Probably Propane, O2 cutting. that will cut 18" metal. I would imagine a
lot of those cuts are now Water Jet cuts.

Saw this about water jet cutting. Forgot about that.
http://waterjets.org/index.php?optio...06&Item id=31
Looks like it's slow for thick metal, but maybe the precision makes up
for it.
Didn't look into laser much, but from what I read the old gas torches
still have their advantages.
The usual balancing acts take place.
At IH there was no special ventilation for the torch floor.
After being on vacation for 2 weeks I'd still be coughing up black
metal.
Luckily I had a heavy cigarette tar coating in my lungs to protect
them.

--Vic