An easy to make Bench Seat
Step 8. Fix the intermediate back-rest slats
Fix the intermediate back-rest slats (a) in place.
Secure with glue and two screws at each meeting.
The ends of the back-rest slats (a) should be flush with the outer side of each vertical back-rest support (d)
Step 9. Fix the first seat slat
Turn the unit upright.Mark where the seat slats (a) are to go along the cross rails (e).
Fix the second from front seat slat (a) in place. The ends of the seat slat should be flush with the outside edge of the front legs (b)
Step 10. Cut 3 seat slats
Measure the distance between the legs. Then cut the ends off three seat slats (a) to fit between the legs as shown in the drawing below.