Second Story Addition Floor Joists

Section r502 10 of the international residential code states that header joists can be the same size as the floor joists when the header joist span isn t greater than 4 feet but if the header joist span is more than 4 feet you ll need to double the header joist and ensure that it s capable of.

Second story addition floor joists.

This means that all the ceiling on the first floor that is under the addition will have to come down. Second floor construction techniques follow a standard process. Live load is weight of furniture wind snow and more. As construction gets higher builders must take additional safety precautions to prevent falls.

What this means is that the first story ceiling joists will also serve as the floor joists for the second story. The joists are so straight that i can t hardly find the crown in the lumber. Typically the second story floor joists will not only run the same direction as the first floor joists they will also be directly over them. Dead load weight of structure and fixed loads 10 lbs ft 2.

The ability to stay in the neighborhood you ve lived in. The addition is about 500 sq ft. Ripping the roof off your house and adding a second story addition on top might sound like a drastic means of gaining space but there are various situations in which a total home makeover makes sense. The extra two inches of vertical distance when a floor is framed with 2 x 10 joists rather than 2 x 12s can be quite important for example.

Common sense tells you that large floor joists can carry more load and spacing joists closer together also increases the load bearing capacity of a floor. 1 ft 0 3048 m. In some cases second story addition plans could be a big money saver in others the real payback is something you can t put a price on. Is there a way in which we can save those joists and the first floor ceiling by adding more structure to create the appropriate floor joists for the second story.

The first floor is about 1100 sq ft. This means that all the ceiling on the first floor that is under the addition will have to come down. Is there a way in which we can save those joists and the first floor ceiling by adding more structure to create the. 2 grade of douglas fir are indicated below.

Maximum floor joist span for no. The structural engineer says that we must remove these joists and use 12 i joists instead to create the second story floor. Additional support for the floor joists is achieved by nailing the ends of the joists into headers. 1 psf lb f ft 2 47 88 n m 2.

While first floor supports are needed to account for the additional weight of a second floor the walls are pretty much the same as those of a single story home. The 2x12 lumber that i picked up a few weeks ago is perfect.