See if this is what you are looking for. I took our barrier
model and installed three of them with the toes touching to make the smallest
radius I could get.
his results in a 36.7 ft radius in CAD. In reality it may
be a little less, but somewhere around 40 ft for the radius is a pretty good
As you mentioned, this does not reflect crashworthiness,
only the minimum potential radius. I don’t believe that there is crash testing
on minimum radius PCBs. GMU recently looked at curvature for longitudinal
barriers. That may be the most updated guidance we have.
There will be a safe limit as increased curvature would
increase the effect impact angle and severity and tend to increase vehicle
climb and instability. However, I don’t believe that has been defined. Vertical
shape PCBs would improve the climb and stability aspect.
Let me know if that helps or if you need more information.