This is yet another 2"x4" question.
What's the best way to attach a 2"x4" to another 2"x4" that's resting over it?
The rail is a 2x4 and it will be held, on each side, by two 4x4. Under the 2x4 rail I'll have another 2x4 that will keep the top 2x4 straight.
I only have a circular saw and a jigsaw, so, I can't do complex joints.
I forgot to mention that I have to attach these 2x4s to the 4x4 wood posts.