That is the height of the top of a standard 2 4 joist hanger available from your local building supply store.
Building a garden picket fence.
It is not necessary to fill the hole with concrete all the way to the top.
Mark every 8 feet for the posts.
Figure out where you want the gate to go and mark posts at least 4 feet apart.
In this project the pickets stand at 36 above grade and the posts are 38 without the post caps.
To strengthen the gate and add a touch of charm remove two pickets from the scrap end of the fence panel.
To securely set the posts fill the bottom of your hole with a layer of gravel and place the post in the hole.
How to build a picket fence measure.
Starting at one corner mark where you want the post to go.
Mark each post at the height of the string.
Set the posts in concrete and space them as desired but no more than 96 on center.
Install and trim the posts according to your plan.
Measure the area for the fence and draw a line using spray paint or use stakes and strings to mark the area.
If you re building a traditional picket fence you can use pre made picket fence panels or you can attach pickets to horizontal rails.
Use a post level to ensure the post is plumb and pour concrete to hold the post in place.
2 mark stringer positions.
This video shows you h.
1 install and trim posts.
How to build a picket fence.