Floor Framing Support Wall Above Parallel To Joists

Makes the plumbers and electricians smile.

Floor framing support wall above parallel to joists.

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. You may need to lift insulation or plywood to see the joists. 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.

If you have 3 or 4 inch diameter pipes running through the wall make the wall from 2 x 6 inch boards. Score 1 for being non load bearing. If the joists run perpendicular to the wall an adjustment should not be necessary. Floor joists and ceiling joists serve similar purposes.

Generally floor or ceiling joists run parallel to the rafters. For better performance the designer may wish to add a joist or blocking panels below the non bearing wall. 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. Nonetheless this does not ensure good floor performance.

The recommended detail for. Thus for a 2x4 bearing wall two joists are below spaced 3 1 2 apart directly under. 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. 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.

Unless you have a finished attic the ceiling joists are typically exposed. This wall is running parallel to the floor joists above see picture 4.