1 plan your floor framing layout.
Floor joist placement.
In general practice 2x8s 2x10s or 2x12s are used when framing a raised floor instead.
This size is no longer acceptable when framing a structure.
A floor s framework is made up mostly of wooden joists that run parallel to one another at regular intervals.
Continuing on from part 1.
Some newer homes have manufactured i beam shaped joists.
Using floor joist span tables.
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.
Any large knots found near the edge of the board should face up as well so the weak wood of the knot will be compressed rather than stressed.
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.
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.
Residential structural design vertical structural forces we were about to start learning about floor joist span tables.
The amount of flex that is acceptable in the floor you can play with a joist span calculator here.
In the past 2x4s or 2x6s were sometimes used as floor joists.
Rock shims or hand packed and pounded smaller stones will stiffen the post placement and allow for proper drainage.
Good luck and keep us up to speed with your progress j.
The exact size necessary may be stipulated by the building code required for a particular structure.