Well this is where you have to sort of take a guess or at least i did.
String line fence post.
Using your string line you will run the string on the outside of the soon to be installed fence.
How do you know you are parallel with the property line is the fence actually on the property line.
This can easily throw your fence line out of alignment.
Hammer your stakes in clear of your post holes so that the stakes are not disturbed during digging.
The longer the run the tighter the string needs to be to stay straight.
Use a string line level or bench level to make sure the line is level then check to see that.
At this point you pull the string to where you are placing the opposite end post.
Considering this your corner posts should be longer and if possible larger than your line posts.
To ensure the posts are even in height run a tight string line between corner posts and end posts.
The following formula will help you compute the number of fence posts you need.
Mark the positions of the line posts and dig a hole for each one directly under the string.
Pulling a string it s really called mason s line tight between two points is the best way to build a fence straight and true.
Measure the positions of the posts with a tape measure and drive a stake at each point.
The outside edge of the stake should just touch the line.
Stretch mason string between the centers of all the batter boards to delineate the perimeter of the fence.
For me building a fence starts with getting posts plumb and in a laser straight line.
Drop a post into each hole and line its face up with the string while you plumb it.
The lower string is to the ground without touching the ground the better.