Broken Beam

[James-W]

I've got a cracked beam, how should I fix? Tear it all down and build new!!
Some people have way too much money.
And if you do, just pay people to fix all your stuff and you don't need a garage.

It isn't just the cracked beam, he says he has a leaky roof and it has been leaking for some time now. So how much water damage has been done to the old roof? Well, we don't really know and the only way to find out is to tear off the rolled roofing and check it out. I am assuming rolled roofing was used because there is too little pitch to use regular shingles. For all we know he may need quite a bit of repairs in order to get the roof back in good condition again. The unfortunate thing is, doing a repair job correctly sometimes means spending more money than you really want to spend. My thinking is, since the roof is in poor condition anyway (leaking) and since we are still not certain just why the beam broke, this would be a good time to take a long hard look at the garage roof and do whatever it takes to make it right.

 

[stealthmagic27]

support and jack on both sides as Jakkle said then 2qty 2x10x20 LVLs trussloked together and replace that whole beam all together. And adequate support beams on both ends. That's the way I see it....

 

[rlitman]

With that stupid knot in the board, it was effectively a 2x4 !
Some lumber gets used in construction when it's really meant to be firewood.

THIS! I found a rafter in my house like that. I jacked it up, sistered it properly, and all is well.

In your case, the **** 2x10 lasted how many years before failing? If it were my garage, I'd put up temporary supports to jack up the roof to where it should be, plus enough room to remove and replace that beam. Then I'd replace it.
I'd take the original 2x10, and size it up to a pair of quality 2x12s, and give them adequate vertical support at the ends.