Build your own outdoor chairs out of 2x4s, designed to work with 24" x 24" cushions. Free plans created by Ana-White.com
6 - 2x4 @ 10 feet long
75 - 2-3/4" star head construction screws, exterior approved
TIP: Consider prestaining or painting the 2x4s before assembly for a faster and neater finish.
10 - 2x4 @ 25-1/2"
2 - 2x4 @ 28-1/2"
10 - 2x4 @ 24" or width of cushions (TIP: If your 2x4s are exactly 10 feet long, then consider cutting them all at 23-3/4" to get four cuts on one 2x4)
Cut all boards using a circular saw and a straight edge. A chop saw or miter saw would be faster and more accurate.
If you have a pocket hole jig, this would be a great spot to use it. If not, you can attach by screwing at an angle. Start the screw almost perpendicular, about 1" from the end, and then once you get the screw going, angle at a 45 degree angle and finish driving the screw. Two screws per end.
TIP: It may be easier to attach the lower one first, so you can fit your drill in there.