Build a Homemade Picture Post
by John Pickle
Materials (Cost ~ $20-$30)
- 7 to 8 foot 4" x 4" post (consider pressure-treated lumber or plastic composite lumber)
- 9-inch diameter plywood disc, 3/4" thick
- 5-inch plywood octagon (2-inch sides) 3/8" to 1/2" thick
- Permanent marker or paint with fine tipped brush
- Four 3" to 3.5" coarse thread exterior drywall screws
- Glue (exterior quality)
- Polyurethane (exterior quality)
- Consider using a post anchor. These can be purchased at home improvement stores for under $20.
- Portable drill and 1/8" drill bit
- Shovel or post-hole digger
- GPS (Global Positioning Satellite device)
Step 2: Placing the Post
- Choose a location best suited for your interests (e.g. your garden, wooded area, meadow, favorite tree, pond, etc.).
- Take some test pictures to help you in choosing a location and post height.
- Look around to make sure that no vegetation will grow up and obscure the view!
- Consider accessibility by others.
- If public, make laminated instructions to post. (See Step 7 for ideas for a permanent sign.)
Step 3: Installing the Post
- Dig a hole at least 3 feet deep and wide enough for the 4x4 post. You want 4 feet of the post above ground.
- For stability, the bottom of the post must be below Frost Depth. For the Boston, MA area, this is 3 feet. Talk to local builders to see what is recommended in your area. Consider using a post anchor as used for mailbox posts. (See Step 6).
- You may attach post head to an existing post or secure structure.
- Keep the post vertical, back fill the hole with dirt, tamp dirt until firm and post is stable.
Step 4: Assembling the Post
- Center and level post head (from Step 1) onto post.
- Take and record the GPS reading from the top of the post to find the latitude and longitude.
Step 5: Aligning the Post Top to True North
- Find True North for your location.
For Boston, MA area in early 2006, magnetic north is 15 degrees west of true north (see photograph of compass). Notice that the compass is held so that the white tip of the compass, which points north, points 15 degrees west of north.
- Align an edge of the 5" octagon east/west with respect to true north.
Step 6: Securing the Post
- Double check alignments and drill four holes through the post head into the post.
- Secure with the drywall screws.
- Using permanent marker or paint, label the post head with location information and basic instructions (see photograph in Step 1).
- Seal with polyurethane.
Step 7: Add a Helpful Sign
Clear and easy-to-follow instructions are a key to a successful Picture Post. We have put together a collection of signs for you to review. Choose the best one for your post.