Floor Framing Support Wall Above Parallel To Joists

If the joists run perpendicular to the wall an adjustment should not be necessary.

Floor framing support wall above parallel to joists.

If the joists are parallel to the new wall adjust the layout so that the wall is directly under a joist. Makes the plumbers and electricians smile. Generally floor or ceiling joists run parallel to the rafters. This verification can be achieved with our forte software.

You may need to lift insulation or plywood to see the joists. Score 1 for being non load bearing. Thus for a 2x4 bearing wall two joists are below spaced 3 1 2 apart directly under. Score 1 for being load bearing.

You would be able to check if this is the case in your home by going up into the attic. Unless you have a finished attic the ceiling joists are typically exposed. In some circumstances the wall s top plate aligns with a parallel joist which provides an anchorage surface but still requires blocking to accommodate ceiling drywall. When i draw plans i locate joists under bearing walls only for parallel walls off layout but i do it with two joists spaced apart the depth of wallplates above.

The blocking provides a nailing surface for walls that fall between joists and serves as an evenly spaced fastening surface for finish materials such as drywall. However there is a large double 2x10 header above the entry way see picture 4 in this wall supported by a jack stud on either end see picture 5. Nonetheless this does not ensure good floor performance. Floor joists and ceiling joists serve similar purposes.

For better performance the designer may wish to add a joist or blocking panels below the non bearing wall. This wall is running parallel to the floor joists above see picture 4.