Continue constructing the frame of a freestanding deck with the inside joists.
In this design, the inside joists are the same length as the outside joists. Gang-cut the inside joists using production methods: Set up a cutting platform so you can move boards on and off easily and work comfortably. Make sure the boards will be properly supported while you cut. Check the ends; if one is not square or has a split, cut off 1 or 2 inches. Use one joist as a pattern, attaching a temporary cleat to one end to keep it flush with the others. Measure and mark for the cut; draw an X to indicate which side of the line will be cut. Cut with a power miter saw or a circular saw.
Blocking keeps joists from warping and stiffens the framing. Snap a chalk line down the center of the joists. Measure the space between each joist as you go, and cut blocking from the same stock as the joists. Install them in a staggered pattern that allows you to face-nail each one.
If a deck will turn a corner around a house, special framing is needed. The decking pattern determines the framing configuration. If the deck boards will meet in a butt joint (left), the framing is simple. If the decking will meet at a mitered corner (right), support the miter joint with two joists installed at a 45-degree angle; attach a 2x4 nailer to each side, for added nailing surface.