Watering grid for square foot gardening.

Edmonton, AB(Zone 3a)

I am looking to build a watering grid something like this for square foot gardening, I plan on building a 4'x4' vegetable garden.
Through my google searches I have seen a variety of grids that people have built. Some use micro sprinklers and others have holes drilled along in each grid. I was leaning towards drilling holes in the tubing for each grid. I plan on using 1/2" blank tubing from Rain Bird. And the barbed Tees, and elbows also from Rain Bird.
Does anyone have any tips or suggestions? I've never done square foot gardening or built a watering system.
How big would I have to drill the holes in the tubing and how many holes per side cover each 12" square?

Thumbnail by robertsonj88
This thread has 2 replies. This forum is accessible only to subscribing members of Dave's Garden. There are many free features here, and about half of our forums are completely open to all members. And learn more about Dave's Garden, and explore the benefits of becoming a subscribing member.

Want to join? Register here. Already signed up? Click here to login!