Deck Joist Spacing 24 Inches. How far apart are in general terms, joists spaced 16 inches on center can span 1.5 times in feet their depth in inches. The deck is about 12 years old and some of the joists have to be replaced due to rot.
2x10 if joists are spaced:
Typically, deck joists will be spaced 16 from center to center. The second major factor on spacing is the chosen decking. The joist should not span anymore in feet than the width in inches. Load placed on the floor.
