Joist Hangers
Never Modify Joist Hangers

Improvising by bending, cutting or adjusting hangers in any way not only can be dangerous but also voids all of the manufacturer’s guarantees on the hanger’s performance.  Straight hangers are designed to hold a joist at a 90 degree angle; angled hangers are usually designed for 45 degree angles.  There is hardware for almost any kind of application you can imagine in construction.  There is most likely the perfect connector available, it is up to you to find it.  If there isn’t a connector available you might need to reconsider your approach to the connection.