How would I be able to stop Team Exploding?

What I mean by this is how would I be able to stop people from blowing up their own team mates by using a rocket launcher or bomb. Is there a special function or property for this? Im able to turn off team damage but that doesn't exclude people blowing each other's limbs off. I Don't think it has something to do with blast radius either as it lowering it to 0 wouldn't hurt the enemy team either.