This is the third part of a series about two-story house framing with a gable roof and a garage. The video focuses on floor sheathing, wall framing, and foundation slabs.
Floor sheathing is typically made of plywood or OSB that is eight feet long by four feet wide. It usually has a tongue and groove design for interlocking the pieces together. Square-edged plywood requires blocking at the edges to provide support.
Walls that run parallel to the joists need to have double joists underneath them. A single joist can be used for walls that are perpendicular to the joists. Backing for drywall should be installed on the walls.
Openings in the floor framing, like stairwells, require doubled-up joists. In some cases, beams might be necessary. Doubler joists are connected using hangers. Mid-span blocks are commonly used to prevent floor squeaks. It is recommended to stagger these blocks for better nailing.
When plumbing pipes are running underneath the wall, it is best to keep the blocking flat so that the plumber can easily install the pipes.
Headers are typically mitered at a 45-degree angle to connect to the post and transfer the load. Anchor bolts are required within 12 inches of any breaks in the framing plate.
Slab foundations are typically flat, but the garage slab might be slightly lower. Anchor bolts are typically spaced no further than six feet apart on interior walls. Shear walls might require closer spacing or specialized hardware. Footings for load-bearing walls are typically larger than those for single-story walls. Garage slabs are sloped to allow for water drainage.
