Should 2nd Story Walls Be Built Over Floor Joists

These building codes set the minimum requirements for construction including requirements for framing floor joists.

Should 2nd story walls be built over floor joists.

1a attic access door. A room used solely for sleeping might need to carry only 30 psf whereas a garage floor over a basement would need 50 psf or higher. How second floor walls are supported floor framing. On a framing inspection i noticed 2 x 4 studs spaced at 16 oc for the first floor walls.

In typical residential construction the joists above you will be used for both the ceiling attaching drywall underneath and the floor above with usually plywood or osb as a sub floor and wood flooring tile carpet on top of that. The joists were offest by 6 8 from the studs. If the air distribution is in the attic space then consider insulating the rafters to move the distribution into the conditioned space. Some newer homes have manufactured i beam shaped joists.

The floor joists for the second floor did not stack directly above the studs. First floor live loads have higher requirements than second floor live loads 40 pounds per square foot vs. The wall studs are capped by a double top plate. Floor joists are typically 2 by 8s 2 by 10s or 2 by 12s.

In unfinished attic spaces insulate between and over the floor joists to seal off living spaces below. In this article we are going to provide you with at least six different ways you can frame a floor for a wall that is going to be above it whether it s a basement first floor or multiple floor building this particular building wall here is running perpendicular to the floor joist and is supported by each floor joist this is an. On both sides of the problem area. If a crack or sag is isolated to one area the sister joist should extend at least 3 ft.

The second floor studs did not stack over the floor joists below. The standard second story wall consists of a horizontal floor plate a ceiling plate and wall studs all made from similar dimension lumber. Bearing partitions according to section r502 4 of the 2009 edition of the international residential code joists under parallel load bearing walls must be big enough to support the weight of the load they bear. Load bearing wall removed or altered on first floor.

But it s usually best to run the sister joist over the entire span. When the sagging joists are level apply a generous bead of construction adhesive to the existing joist. This often happens because todays homeowners want a more open floor plan so they remove a load bearing wall without. Once the walls are in place another board the tie plate attaches to the top of the ceiling plates tying all the walls together and providing the base on which to construct the roof.

An inaccessible attic space on the other hand might have a live load of only 20 psf.