Place the pieces in a stack with the bow up, and support the ends on 2
blocks of about 4" high or more. Place a weight of widely distributed mass
to create an inverse of the bow.
The weight object shouldn't create a small area/footprint of pressure.

The weight could be a bag of sand, cement, an unbound bundle of shingles or
other non-rigid mass. You may need to add some additional weight on top of
it, but a wide, soft weight should remove the bow, maybe in as few as a
couple of days.

WB
..................

"Tove Momerathsson" wrote in message
...
I made a small curbside find today, a 3" stack of sheet steel pieces
with a "FREE" sign taped to them. So into the truck they went. The
pieces are 6-10" wide by 30-36" long and range in thickness from 1/16"
to 1/4". Unfortunately, most of the thicker stuff is a bit curved,
bowed the long way anything from 1/2" to 1" at the center. I'd guess
from stress caused by shearing them to size.

Any suggestions how to flatten them out?

Tove




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