# Question: How Deep Does A Light Pole Need To Be?

## How deep should a 12 foot post be in the ground?

In general, holes should be at least 3 feet deep for posts that extend 8 feet or more above ground level.

Posts that extend 6 feet above ground level should have holes at least 2 1/2 feet deep..

## Is 2 feet deep enough for fence posts?

The minimum depth that you should dig your fence post holes for panel sections is 2 feet. A general formula is to dig the holes one-third to one-half of the post’s aboveground height. The deeper you dig the holes, the more stability your fence has, but you must also purchase longer posts.

## How do you calculate wind load on a pole?

Armed with pressure and drag data, you can find the wind load using the following formula: force = area x pressure x Cd. Using the example of a flat section of a structure, the area – or length x width – can be set to 1 square foot, resulting in a wind load of 1 x 25.6 x 2 = 51.2 psf for a 100-mph wind.

## How deep are light pole bases?

ANSWER: The durable precast concrete Pole Base units are typically 2 feet (610 millimeter) in diameter, with a height of 3–4 feet (915–1,220 millimeter) exposed above grade and 3–12 feet (910–3660 millimeter) buried below grade.

## Will wooden posts rot in concrete?

Simply setting the posts in concrete does create a condition that will accelerate rot in the bottom of the posts. With pressure-treated posts, the rot will be slow. … First, the posts should be set on top of a bed of coarse gravel 3 to 6 inches deep, so the base of the post is in contact with the gravel.

## How deep should a 8 foot fence post be?

The depth of the post hole needs to be 1/3 to 1/2 the height of your fence. For example, if you are building a fence that’s 6 feet tall, you will need a hole that is at least 2 feet deep. That also means that you’d need to use an 8-foot post. The hole will need to be about 3 times the width of your post.

## Should I use 4×4 or 6×6 fence posts?

Instead of 4×4 posts, go with 6×6 posts. The extra size makes a huge difference. It’s a smart place to invest a little extra in your fence, because if your posts distort after they have been set in the ground with concrete, they are extremely difficult to replace.

## How deep does a pole need to be in the ground?

Calculating the Depth of the Pole Poles are typically set into the ground: 10% of the overall height + 2 feet, except in questionable soil conditions. Example: Overall pole height: 30 feet, the pole should be buried: 3 feet + 2 feet = 5 feet below grade, and 25 feet above grade.

## How big is a light pole?

Street light poles are typically 8 to 50 feet (2.4 – 15.2 m) tall. Street poles taller than 50 feet (15.2 m) are considered a high-mast.

## How long will pressure treated 4×4 last in the ground?

The Forest Products Laboratory and other research groups have shown that treated wood stakes placed in the ground for more than 40 years remain rot-free. But young pressure-treated decks, many less than 10 years old, are being shoveled into landfills.

## How much concrete do I need for a light pole?

Therefore, the concrete footing has more resistance than the wind on the light at the top of a 30′ pole…and the pole will break before it rotates. The standard for mounting a pole is 2′ plus 1′ for every increment of 10′ of pole. That would mean your minimum depth would be 5′ deep.

## How much concrete do I need for a post hole?

To calculate how much concrete you need, you need to know the post size you are going to use and how many posts you are installing. Your post diameter and height determine how big each hole needs to be. As stated above, fence post holes should be 3 times the diameter of your post and 1⁄3 as deep as your post.

## How many bags of concrete do I need for a 4×4 post?

Mix two 50lb bags of concrete with water in a mixing tub or 5-gallon bucket. Add concrete into the hole and around the 4” x 4”. Depending on your climate, let concrete set up for 24 – 48 hours.

## How do you install a street light pole?

LED Street Light Pole Installation Procedure Subgrade Excavation. … Foundation Earthwork Excavation. … Installation of Steel Bar and Embedded Parts. … Concrete Pouring. … Base Backfill. … Cleaning the basic embedded parts of the wire buckle tape, install led street light pole.