Floor Joist Direction Change

When you lay a floor in a second story the boards must not travel in the same direction as the joist.

Floor joist direction change.

The joist might be forced away by the pressure of the single board and in addition the support will not be given to all boards equally. Another consideration is floor joist direction. I ve always simply rotated them but not always the best solution. The floor joists may run parallel to the short dimension at the floor level but at the roof level the short dimension is the opposite direction.

This sample table gives minimum floor joist sizes for joists spaced at 16 inches and 24 inches on center o c for 2 grade lumber with 10 pounds per square foot of dead load and 40 pounds of live load which is typical of normal residential construction. Question i want to change the direction of floor or ceiling joists in a certain area of my plan. How can this be done. While personal preference is a factor the direction in which you run hardwood flooring boards is governed by visual and structural guidelines.

You can drill 1 1 2 in. True floor joist span calculations can only be made by a structural engineer or contractor. Holes anywhere in the web. Answer you can specify the direction that joists build using a joist direction line however this will force all the joists sharing a floor platform area i e all floors or ceilings at the same elevation to build in the direction specified.

Is there a way to designate which direction floor joists will be oriented prior to drawing them or a way to change the direction afterward. In fact most have little perforated knockout holes that can be punched out with the swing of a hammer. The roof is modern or unique such as a single sloped roof flat roof or a unique overhang. Bearing lines also specify where joists are cut as can walls and beams.

The levels of the home change such as with a half finished basement or split level home. Notching wood and boring rules engineered i beam rules. You can never ever ever notch or bore through the top or bottom flange or chord.