I have come to realize that a lot of people who visit my website are not expert woodworkers, and don't necessarily have a workshop full of tools. So I wrote this article on how to build a table without having a workshop full of tools, or even a table saw. The main tools you will need are a circular saw, a hand drill, a square, and at least two bar clamps.
The table is put together from 2x4 lumber. The only joinery necessary is at the corners. The corners are put together with dowels for one part, and screws for the other part. The drawing at left shows how the pieces go together.
A rafter square, clamped to the 2x4 works quite well as a guide for the circular saw. I like using a rafter square because they are small, sturdy, accurate, and inexpensive. They are called rafter squares because they can be used to mark angles for cutting off rafters at an angle.
To make the cut, press the shoe of the circular saw up against the square. You will have to set the saw to less than its full depth of cut, or the saw's motor will hit the square. A normal (non cordless) circular saw can cut to a depth of about 2.5", so even at less than full depth, it will still easily cut through a 2x4.
Depending on the shape of your circular saw's shoe, and the thickness of the square, it may help to put something under the square to bring it up a bit, so that its not pressing against the round edge of the circular saw's shoe.
After making a series of cuts, just tap the remaining bits out with a small hammer. These should come out quite easily.
Use a chisel to clean out what is left. It's best to clamp your work piece against a
sturdy table while you do this. Provided that your chisel is sufficiently sharp,
you should be able to do this cleaning out just by pushing it, or tapping the back
of it with your wrist.
This is what the rabbet should look like when its cleaned out. It doesn't have to be super
smooth, just flat overall, as this surface doesn't show on the finished table. You will
need to cut four of these rabbets overall - one on the end of each rail that goes side to side.