From 
Image 1 of 21
This chair and love seat combo is just perfect for outdoor lounging. The seat has a nice curved recess to conform to your body, and wide arms to hold your favorite snack and drink.
Image 2 of 21
Figure A Chair and love seat assembly
Image 3 of 21
Figure A Chair and love seat assembly
Image 4 of 21
Figure A Chair and love seat assembly
Image 5 of 21
Figure A Chair and love seat assembly
Image 6 of 21
Seat Brace Pattern
Image 7 of 21
The Arm Pattern
Image 8 of 21
Three Backs
Image 9 of 21
Create a round back by measuring down 15 in. from the top and draw a 14-in. radius with a homemade compass.
Image 10 of 21
1. Clamp the two front legs together, measure for the 3/4-in. deep notch and make repeated cuts with your circular saw set to 3/4-in. depth of cut. Chisel the pieces between the cuts and then file smooth.
Image 11 of 21
2. Spread a light bead of construction adhesive into each notch and align the front stretcher (B) with the edge of the legs. Drill and screw the stretcher to the legs.
Image 12 of 21
3. Mark the angle on the backside of each arm and cut the arms (C) and arm supports (D) with your circular saw.
Image 13 of 21
4. Align the arm supports with the top and front edges of the legs, then drill and screw each front leg to the arm support with two 1-5/8 in. deck screws.
Image 14 of 21
5. Fasten the horizontal arm supports (E) at 90 degrees to the front legs. Then glue, drill and screw the rear legs to the arm supports, making sure the arm supports are parallel to the floor.
Image 15 of 21
6. Cut the seat supports (G) from 1x6 boards. Align the square front edge of the seat brace with the back of the front stretcher (C) and glue and screw them to the front and back legs.
Image 16 of 21
7. Mark a diagonal line on H3, then clamp the board to your sawhorses and cut along the line to make a pair of outer back slats.
Image 17 of 21
8. Set the back slats on a flat surface with 1/4-in. wide spacers. Center the back braces on the slats. Glue, drill and screw them with 1-1/4 in. deck screws.
Image 18 of 21
9. Align the bottom of the back assembly with the seat braces and the tops of the rear legs. Screw the legs to the back brace and screw the horizontal arm supports to the center back brace.
Image 19 of 21
10. Space the seat slats (M), evenly starting at the back. Drill one pilot hole on each end of the slats and screw them to the seat brace. Screw the front seat slat to the seat brace as well as the front stretcher (B).
Image 20 of 21
11. Set the arm flush with the edge of the arm support (E), overhanging the front leg 1-1/2 in. Mark the arm where it meets the back slat.
Image 21 of 21
12. Notch the arm with a handsaw and fasten it to the horizontal support, the top edge of the back legs and to the front leg and arm support with 1-5/8 in. screws and glue.
easy enough and sturdy to