The following table details the recommended installation depth for square posts without the use of an anchor post. Archerfish recommends the use of an anchor post with every post installation to increase safety in the event of a vehicle collision with the post, and to help maximize the amount of available space on the post for mounting a sign.

 

 

Installation Depth Notes:

1. The depth numbers we are providing are general guidelines and do not take into account the different types of soil in your specific location. When possible, it is ideal to install square posts to a depth of 30″ - 36″.
2. A breakaway system should be used when installing posts on public roadways and on private roads open to public travel such as those running through a non-gated corporate complex or shopping center. Our breakaway anchor post should be installed approximately 32″ into the ground.
3. Be aware of frost lines as they vary by region of the country.

Square Post Sign Mounting

There are three options for mounting signs to a square post. Option 1 utilizes tamper resistant drive rivets, Option 2 utilizes a standard hex-head bolt set, and Option 3 utilizes a tamperproof one-way bolt set.

Option 1 – Drive Rivets

Installation instructions:

Place the sign on the square post where it meets your height requirement and line up the mounting holes with the holes on the post.

Insert drive rivets through the mounting holes on your sign into the post.

Using a hammer, hit the drive rivet until the pin is flush with the head.

 

Option 2 – Standard Hex-Head Bolt Set

 

Installation instructions:

1. Place the sign on the square post where it meets your height requirement and line up the mounting holes with the holes on the post.
2. Using bolt sets, insert a washer over the 5/16″ bolts and then insert the bolts into the mounting holes of the sign and through the post.
3. Insert a washer on the other end of the bolt followed by the nut and tighten the nut down.