If you're thinking about making a work table have a look at this design. It's easy to make and it's super sturdy. If you have a Miter Saw you can finish this in about 2 hours.
You can download the free plans here: https://3dwarehouse.sketchup.com/mode...

List of 2X4:
30" x 4 pieces
63" x 4 pieces
20" x 4 pieces
2" x 4 pieces
32" x 8 pieces

Ply Board
36 x 63 Inches
35 x 55 Inches