Height Of Floor Joists

Live load is weight of furniture wind snow and more.

Height of floor joists.

If you re figuring the total height of a house the thickness of the floor will depend mostly on the size of the joists. The floor joist spacing is the distance between the centers of any two installed joists. Two by 6 inches is a joist size frequently used in both indoor floors and as deck joists. Dead load weight of structure and fixed loads 10 lbs ft 2.

1 ft 0 3048 m. Even though we use 1 pt lumber the joists are often slightly warped or vary in depth at times causing adjacent joists to differ in height by as much as 1 2 inch or more. 2 grade of douglas fir are indicated below. True floor joist span calculations can only be made by a structural engineer or contractor.

1 psf lb f ft 2 47 88 n m 2. See the image below for an example of joists spaced 16 on center 16 o c. Setting the joists perfectly level at the house is easy and the beam makes them fairly even near the front edge but the problem is in the middle. Standard floor thickness however is substantial in order to provide the strength necessary for bearing the weight of the walls the ceiling and the roof.

This sample table gives minimum floor joist sizes for joists spaced at 16 inches and 24 inches on center o c for 2 grade lumber with 10 pounds per square foot of dead load and 40 pounds of live load which is typical of normal residential construction.