2 1/2 inch wood screws

1 1/2 inch wood screws

braces

L brackets

2 inch nails

varnish or paint

Tools:

Work Gloves

Hammer

Drill

Screwdriver

Sander (optional, but recommended)

Saw (table saw would be best)

Paint brushes

The steps:

1. Disassemble palettes. Make 3 piles (good slats, good 2x4's, scraps)
2. Remove all nails and discard.
3. Lay out 2x4's to make frame for tabletop.  For the example we put 3 end to end to form the sides.  One went in between the two sides on each end.  3 more made up the middle runner for stability.
4. Lay out slats on top of 2x4 frame to determine the number needed.
5. Remove slats and set aside.
6. On a flat surface use braces and 1 1/2 wood screws to connect 2x4's to make up the sides of the frame.  Attach inside and outside.
7. Using the 2 1/2 inch wood screws attach the sides of the frame to the ends of the frame.  Drill pilot holes as necessary.
8. Measure from outside edge to outside edge.  This will be the new length of your slats.
9. Measure your slats and subtract the outside edge to outside edge measurement.  This is how much you will need to trim away.
10. Divide that number by two.  Trim that amount from each side.  This should leave the nail holes that were in the center... in the center.  For the example, we trimmed away 2 1/2 inches from each side which removed any splits and rough looking ends.
11. Attach the slats to the tabletop frame with nails.
12. Turn the tabletop over, face down
13. Cut two 2x4's for each leg you need (due to the length of our table, I made 6 legs).  The legs should be the desired tabletop height (usually around 30 inches) minus 1 inch.
14. Run a small amount of wood glue down one 2x4 and screw two 2x4's together for each leg.  
15. In the corners attach the legs by screwing 2 1/2 wood screws from both sides.
16. In the middle (if applicable) attach the legs by screwing 2 1/2 wood screws through the side and into the leg and also place an L bracket on either side of the leg for stability.
17. Turn the table upright.
18. Sand as needed.
19. Paint or vanish as desired.