# How To Calculate The Anchor Bolt For The Octagonal Foundation

## Calculate The Anchor Bolt For Octagonal Foundation

** How To Calculate The Anchor Bolt For The Octagonal Foundation**

An **Octagonal Foundation** refers to a structural base or footing This is geometrically shaped like an octagon, a polygon with eight sides and eight angles. The design of an octagonal foundation is based on principles of geometry and structural engineering, aiming to distribute the weight of the building evenly across its surface area. How To Calculate The Anchor Bolt For The Octagonal Foundation

**Uses of Octagonal Foundation**

This type of foundation is utilized in various architectural and engineering contexts to provide stability and support to structures built above it. This foundation is used for verticle vessel vertical columns or tanks. The construction of an octagonal foundation typically begins with site preparation, including excavation and leveling of the ground. Reinforcement materials such as steel bars or mesh may be added to enhance the foundation’s strength and durability.

**How To Calculate The Anchor Bolt For The Octagonal Foundation**

We will discuss how to find the coordinates of anchor bolts for octagonal foundations with the help of some given data. given data means the center point coordinates are given.

**The formula for calculating the Coordinates for octagonal foundations**

**Easting = sin∅ x radius +center point Easting **

**Northing = cos∅ x radius +center point Northing**

**Given data**

Radius of Foundation = Dia / 2 = 1750 / 2 = 875

Easting of center point = 61554.492

Northing of center point = 44736.450

Number of bolt = 16

Angles Anchor Bolt C/C = 22.5º

**Solution **

Angles Anchor Bolt C/C = 360º / Number of Bult

Angles Anchor Bolt C/C = 360/16 = 22.5º

The angle of the first anchor bolt = Angles Anchor Bolt C/C / 2

The angle of the first anchor bolt = 22.5º / 2 = 11.25º

**The First Anchor bolt Coordinates **

**Easting = sin∅ x radius +center point Easting **

**Northing = cos∅ x radius +center point Northing**

Easting = sin (11.25) x 0.875 + 61554.492

**Easting = 0.1707+ 61554.492 = 61554.663**

Northing = cos (11.25) x 0.875 + 44736.450

**Northing = 0.858+44736.450 = 44737.3087**

**The 2nd Anchor bolt Coordinates **

**Now the 2nd anchor bolt is angle is 22.50º + First anchor bolt’s angle is 11.25 = 22.50+11.25=33.75º**

Easting = sin(33.75) x 0.875 + 61554.492

**Easting = 0.486 + 61554.492 = 61554.978**

Northing = cos (33.5) x 0.875 + 44736.450

**Northing = 0.727+ 44736.450 = 44737.177**

Now others all anchor to find the same procedure and formula

**The 3rd Anchor bolt Coordinates **

Use the angle =33.75+22.5 =56.25º

**The 4th Anchor bolt Coordinates **

Use the angle =56.25º+22.50 = 78.75º

**The 5th Anchor bolt Coordinates **

Use the angle =78.75º+22.50 = 101.25º

**The 6th Anchor bolt Coordinates **

Use the angle =101.25º + 22.50 = 123.75º

**The 7th Anchor bolt Coordinates **

Use the angle = 175.25º + 22.50 = 1146.25º

**The 8th Anchor bolt Coordinates **

Use the angle =146.25º + 22.50 = 168.75º

**The 9th Anchor bolt Coordinates **

Use the angle =168.75º + 22.50 = 191.25º

**The 10th Anchor bolt Coordinates **

Use the angle =191.25º + 22.50 =213.75º

**The 11th Anchor bolt Coordinates **

Use the angle =213.75º + 22.50 = 236.25º

**The 12th Anchor bolt Coordinates **

Use the angle =236.25º + 22.50 = 258.75º

**The 13th Anchor bolt Coordinates **

Use the angle =258.75º + 22.50 = 281.25º

**The 14th Anchor bolt Coordinates **

Use the angle =281.25º + 22.50 = 303.75º

**The 15th Anchor bolt Coordinates **

Use the angle =303.75º + 22.50 = 326.25º

**The 16th Anchor bolt Coordinates **

Use the angle =326.25º + 22.50 = 348.75º

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