Here is look at a good video showing one method on how to gain access for garages and other roll up/overhead door applications.
Make sure to wear the proper personal protective equipment and be familiar with your equipment prior to to using. Also, having the correct blade helps too.
Stay safe and take care. I hope to see some of you at FDIC.
Not trying to thread-jack you, enemy, just like to drop those two sites into appropriate threads here and there, because I've found them so incredibly educational for myself, and want to spread the word. Both websites, BTW, I found as results of them being referenced in threads here on FFN.