Floor Joist Placement

When possible position floor joists with any crook in the board facing up so the weight on the joist will tend to straighten it out.

Floor joist placement.

A floor s framework is made up mostly of wooden joists that run parallel to one another at regular intervals. 1 plan your floor framing layout. Continuing on from part 1. Good luck and keep us up to speed with your progress j.

All these conditions are important when determining floor joist placement on sill plates and beams. Don t worry you won t need to do a lot of calculations in determining the size and placement of the structural framing within your house design. Floor joists are typically 2 by 8s 2 by 10s or 2 by 12s. In the past 2x4s or 2x6s were sometimes used as floor joists.

Using floor joist span tables. This size is no longer acceptable when framing a structure. Ceiling joists are usually 2 by 6s or sometimes 2 by 4s if it is an older home. Study the blueprint and make note of the location of any stairway openings floor joist cantilevers in construction floor beams and heavy loads from above.

The amount of flex that is acceptable in the floor you can play with a joist span calculator here. In general practice 2x8s 2x10s or 2x12s are used when framing a raised floor instead. Some newer homes have manufactured i beam shaped joists. Rock shims or hand packed and pounded smaller stones will stiffen the post placement and allow for proper drainage.