Layout
Step 1
Measure out the deck width against the side of the house with a tape measure. Tack a nail to each mark and wrap a string around it.
Step 2
Measure the length of the deck straight out from the nail, and place a wooden stake. Repeat for the other side.
Step 3
Connect the strings on the nails to the stakes. Pull the string taut and wrap it around each stake.
Step 4
Run another string line between the two wooden stakes.
Step 5
Measure the two diagonals inside the string rectangle. Ensure that the measurements match.
Blocks
Step 1
Set a concrete block on the ground 13 1/2 inches inside one of marks on the house. Repeat for the other mark. Place a 2-by-6 support board on the divot of each block. Ensure the board aligns with the marks on the house. Check the joist for level.
Step 2
Place a concrete block at each wooden stake. Set a 2-by-6 support between the blocks. Check for level. Run a string line between the support boards next to the house and the ones you just installed. Check for level with a string level.
Step 3
Have a helper position a 2-by-6 end joist against the ends of two support boards. Fasten the joists by drilling 2 1/2-inch deck screws through the joists and into each support board. Repeat for the other side.
Step 4
Join the interior joists to the end boards. Space them 16 inches apart. Screw them in place with deck screws.
Step 5
Set the interior concrete blocks under the joists. Space them in rows about 2 feet apart. Ensure the joists fit comfortably in the divot. Remove soil or add gravel to achieve this, if necessary.
Step 6
Check for level. Remove soil or add gravel to obtain level.
Deck
Step 1
Apply a plywood panel to the corner of the framing. Place it flush against the support board and the end joist. Fasten in place by drilling deck screws about 6 inches apart through the plywood and into the joists and support board.
Step 2
Place the next panel in position. Fasten it to the deck with screws at every joist and the support board.
Step 3
Continue fastening the deck panels as you did the first two. Cut end panels to length with a circular saw.