Framing Floor Joists Around Stairs

Level over from the top of the stairs to a point above the bottom of the stairs.

Framing floor joists around stairs.

There are lots of ways to build stairs. 8 from the foundation to the stairs. To frame a floor that s 12 feet 3 7 m x 18 feet 5 5 m you would need 4 12 ft 3 7 m sill plate boards 4 18 ft 5 5 m rim joist boards and 9 18 ft 5 5 m main floor joists. At most home improvement centers you can also have your lumber cut to the desired specifications when you order it.

A joist is made from wood concrete and steel and it is basically a strong material that provides support and stability to the entire house. Tji floor joist framing. It s 11 from the foundation to the joist. Floor joists are typically 2 by 8s 2 by 10s or 2 by 12s.

But regardless of the method you choose every set of stairs requires the same basic approach to get from one floor to another safely comfortably and legally. A floor s framework is made up mostly of wooden joists that run parallel to one another at regular intervals. Floor joists align with the wall studs which align with the first story floor joists. Tji s engineered wood i joists are my preferred framing members for floor systems.

The challenges are to make sure that all flooring materials are considered because by the time all the framing and finished materials are on the stairs you can t have a variance of more than 3 8ths from top to bottom of each riser which is a critical issue. Framing for floor openings a staircase is essential for commuting between floors but it creates an opening in the second floor so you can t run the joists from one side of the house to the other without interruption. Some newer homes have manufactured i beam shaped joists. Although they used an odd practice of notching every 2x10 about 1 1 2 to set them lower on the sill plates because above this is a tiled area and i guess they needed the joists lowered to make the tiled floor flush w the rest of the floors.

Tji s offer many benefits compared to traditional dimensional lumber joists including. Stair construction can intimidate even the most seasoned carpenters. Ceiling joists are usually 2 by 6s or sometimes 2 by 4s if it is an older home. That means adding stairs and a new set of challenges to the framing process.

Almost no twisting or warping very little dimensional shrinkage stiffness and strength. A joist is a horizontal support member that holds up the wall beam ceilings and floors and connects these parts with one another and one example of the purpose of a joist is to connect the floor joist that is used to connect the stairs of a home.