Standard Distance Between Floor Joists
The spacing is determined by the size and span of the joists.
Standard distance between floor joists. To find the actual distance between the inside edges of each adjacent floor joist subtract 1 inches from either 12 or 24 inches. Deck joist sizing and spacing enjoying your deck on a beautiful summer day is the perfect way to entertain guests outside or just unwind and relax. So the challenge to builders is to choose joists that are appropriate to the load they carry while maximizing space. For example if you double the thickness or number of joists in a floor the distance the boards can span will increase by approximately 25.
See our complete chart of floor joist size span and spacing requirements before you build. The maximum distance a deck joist can span between supports is determined by the joists dimensions and species as well as the spacing between joists. Looking at this table you will see there is a choice in the size of floor joist 2 x 6 2 x 8 2 x 10 or 2 x 12 and there is a choice in the joist spacing 12 16 or 14. The floor joist spacing is the distance between the centers of any two installed joists.
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. And while its important to have a deck thats aesthetically pleasing to you the most vital part about your deck is making sure its structurally sound. Still when framing a raised floor its easier to think of floor joist spacing in terms of 12 16 or 24 inches on center because each joist is positioned along the header according to its center point. But if you double the width of the boards the distance the joists can span increases between 80 to 100 even though youre using the same board feet of lumber.
Typical wood joists are usually 16 centers i joists are usually 24 as they are engineered and dont flex like wood.
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