Second Floor Joists

A floor s framework is made up mostly of wooden joists that run parallel to one another at regular intervals.

Second floor joists. Live load is weight of furniture wind snow and more. Framers construct the second story floor system to match the layout of the main floor system. The floor joist spacing is the distance between the centers of any two installed joists. In the example the joists have a spacing of 16 inches and a span of 11 feet 2 inches.

Floor joists installed on second or third or higher levels double as ceiling joists for the level below. I have a 20 x 40 x 18 ft rv building basically 800sq ft which i want to add a second floor. 2 grade of douglas fir are indicated below. 1 psf lb f ft 2 47 88 n m 2.

An inaccessible attic space on the other hand might have a live load of only 20 psf. Click to add item 16 x 20 trimmable end floor truss to the compare list compare click to add item 16 x 20 trimmable end floor truss to the compare list add to list click to add item 16 x 20 trimmable end floor truss to your list. Since the example house we are designing for is 12 feet wide we need to find in the floor joist span table a joist size and centering that can span 12 or wider. Second floor construction techniques follow a standard process.

Joist span and spacing is set by your local building code. When building a house or even a deck it is important to confirm you have the correct joist sizes spans and spacing before you get started. Ceiling joists are usually 2 by 6s or sometimes 2 by 4s if it is an older home. See the image below for an example of joists spaced 16 on center 16 o c.

Dead load weight of structure and fixed loads 10 lbs ft 2. Tubs sinks showers or appliances. As well as human traffic. 1 ft 0 3048 m.

Maximum floor joist span for no. The walls are std concrete block. The span table for a 30 psf live load 10psf dead load floor indicates a required fb value of 1 315 and a minimum e value of 1 800 000. This size is no longer acceptable when framing a structure.

In the past 2x4s or 2x6s were sometimes used as floor joists. While most residential construction uses 2x8 joists with 16 inch spacing there are many other factors you need to consider when determining the proper joist span length. Floor joists are typically 2 by 8s 2 by 10s or 2 by 12s. To be storage space for 2800 cb ft of house hold.

I want this added floor space 2nd floor to support 23000 lbs of house hold furniture no water fixtures. 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. In this case your joists are adequate to support a 30 psf live load and 10 psf dead load. First floor live loads have higher requirements than second floor live loads 40 pounds per square foot vs.