Where do I find rules for damage/weight with Improvised Thrown Weapons?

[JW86]

As per title. I'm rolling up a gestalt Goliath Half-Minotaur Barbarian/War Hulk/Hulking Hurler type character.

I just need to know the rulings for +x lbs = +y d6 damage, and where to find the ruling?

Thank you.

[Jowgen]

Complete Warrior page 159

[JW86]

Thank you.