Height Of Floor Joists

2 grade of douglas fir are indicated below.

Height of floor joists.

1 psf lb f ft 2 47 88 n m 2. Two by 6 inches is a joist size frequently used in both indoor floors and as deck joists. See the image below for an example of joists spaced 16 on center 16 o c. True floor joist span calculations can only be made by a structural engineer or contractor.

Maximum floor joist span for no. In joist sizes the larger size such as 6 inches represents the height of the joists while the 2 inch size represents the joist width or the area on which the floorboards sit. Live load is weight of furniture wind snow and more. 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.

If you re figuring the total height of a house the thickness of the floor will depend mostly on the size of the joists. 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. 1 ft 0 3048 m. Dead load weight of structure and fixed loads 10 lbs ft 2.

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.