How to - Floor Framing Part 9: Blocking, Cripples, and Joist Hangers 

Floor Framing Part 9 is packed full of special techniques to make your flooring system sturdy. We show you how to make cripples for your rough openings as well as the importance of using joist hangers in your project. We top it all off by demonstrating an easy way to install blocking to create a sturdy floor