We did not pour cement reinforcements for the trellis, as we were going to stay above the frostline, and it was not going to be very large (and thus didn't have to support too much of a load). We built this in 2006, and after 5 years (with lots of rain and snow storms) it is still doing just fine!
What you will need:
posts: pressure treated 4x4s, 8' long, 4 of them, $15 each ($60)
front and back cross pieces: pressure treated 1x6s, 6' long, 2 of them, ($10)
left and right cross pieces: pressure treated 1x4s, 42" long, 4 of them ($15)
top cross pieces: pressure treated 2" square balusters, 4 feet long, 7 of them ($.89 each)
wooden ladder trellises, 2 of them ($20)
wood deck screws
post hole digger
saw (hand saw)
drill and bits
rocks and bricks
pencil for marking lines
All wood we used was pressure treated except for the side trellises.
Note: this is the step by step instructable for this photo instructable, as part of the Share Your Garden Photo Contest:
Home-built Garden Arbor
Don't forget to vote!
Step 1: Plan arbor dimensions and choose a site
Choose an appropriate site. Make sure that there are no pipes, roots of trees or large bushes, or major rocks (boulders) where the posts should go.