tree bridge help

ok i have a tree bridge but i dont know how to make it "lay down" , cuz its standing, i need it to fall.

how do i make it lay down?

Search around the animations of it using the little window that can play different animations, find the animation the "Falldown and break" is called.

Use a "Animate Destructible" trigger.

Or set its life to zero in the World Editor, or kill it with triggers.