Sub-floor framing includes the framework that eventually supports the flooring. A number of systems can be used to construct a sub-floor frame. These include:
![Photo of conventional timber bearers and floor joists.](images/page_001_1.jpg)
Conventional timber bearers and floor joists
![Photo of long span engineered timber products.](images/page_001_2.jpg)
Long span engineered timber products
![Photo of mild steel and cold-formed steel members.](images/page_001_3.jpg)
Mild steel and cold-formed steel members
The basic principles of these sub-floor framing members are similar