Break stuff with timer

I have a sheet of wood thats being held up by 4 beams, when you make
the trigger go off i want the trigger to breake the first beam then
every second i want the next beam to break..

From your trigger, add 4 outputs, triggering each beam to break, with increasing delays.

Say the breakables are named beam1 - beam4.

So add an output:

Output: OnTrigger, Target: beam1, Input: Break, Delay: 1.0

and add another:

Output: OnTrigger, Target: beam2, Input: Break, Delay: 2.0

and so on.