NAC, but wrenching content

[Andrew Buc]

For a few years I've had a pair of stamped sheet-steel ramps that you 
can drive a car onto in order to get one end in the air w/o jacking it 
up. If you took a cross-section of the ramp at most points, it would be 
like this:

  _______
U       U

The tire rests on the flat surface between the U-shaped sections (which 
are shown upside down above). I've roughly eyeballed the U-shaped 
sections at 1.5" wide x 2" high. On one of the ramps, one of the 
U-shaped sections has been deformed so the straight parts of the U are 
about 1/4" apart, and not quite parallel. This is at the place where 
the cross-section actually rests on the ground, at the opposite end 
from the gently sloped end that you drive the car onto. I'm sure I 
could insert a tool and spread the sides out to their original width, 
or close to, but would the ramp then be dangerous to use? Is it 
dangerous to use now? If the answer is yes, they're going straight in 
the dumpster. TIA