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Geodesic Sphere Kits that are Easy to Build!

3V Geodesic Sphere Calculator

Zip Tie Domes

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Geodesic Sphere Kits that are Easy to Build!

3V Geodesic Sphere Calculator

Zip Tie Domes

3V Geodesic Sphere Calculator

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1-931-858-6892

 

How to Use the Sphere Calculator

1. Select Hub Size:
Select "No Hubs" to get the true "chord" length for each strut, which is the full distance for the strut between each geodesic sphere vertex.
For most sphere construction methods, you will use the "No Hubs" selection.
With our Zip Tie Domes Hub Design, the geodesic sphere vertex is located in the middle of our "Center Ring".
When using our Hubs, the width of our Center Ring must be added to the strut length to give the true geodesic sphere dimensions.
Select Standard 4" Hubs for calculating domes with our 4" Standard Hubs or Dual Covering Hubs, which have a 2.375" Center Ring. These hubs are used with 1" PVC pipe for struts.
Select Super 6" Hubs for calculating domes with our new 6" Super Hubs, which have a 3.5" Center Ring. These hubs are used with 1.5" PVC pipe for struts.
Select Mega 8" Hubs for calculating domes with our proposed 8" Mega Hubs, which will have a 4.5" Center Ring. These hubs will be used with 2" PVC pipe for struts.

2. Feet or Meters
Click the button for "Meters" if you are using metric measurements.

3. Data Entry:
Enter a number with or without a decimal fraction in any of the number fields on the left. (For example, enter "5" or "3.3333")
Click the Calculate Button. All of the other numbers will be automatically calculated.
The Blue Struts are always the longest struts. If you know your longest strut length, enter your data for the longest strut length in the Blue Strut field.
To build a strong sphere, the longest strut should not be more than 6' long.

Cost Calculation and Material Utilization Chart
The default "Length of Pipe" for cutting your struts has been set to 10'. You can change this to 20' or whatever length of pipe you have to cut for your struts.
You can also update the "Cost Per Pipe" amount, and click the Calculate field, and the "Total Cost of Materials" amount will be calculated at the bottom of this section.
If you are cutting 4' struts, consider using 20' lengths of pipe, as there will be less waste as compared to cutting 4' lengths from 10' pipe.

3 Frequency Sphere Calculator

3v Geodesic Sphere Calculator
3v Sphere
 
Select Hub Size
No Hubs:     Standard 4" Hubs:     Super 6" Hubs:     Mega 8" Hubs:
Feet:   Meters:
Enter
 
Convert to Feet & Inches
Chord
 
 
Numbers Only

Sphere Radius

0' 0"

 
 
Numbers Only

Length of 120 Blue "A" Struts

0' 0"

.41241

 
 
Numbers Only

Length of 90 Yellow "B" Struts

0' 0"

.40355

 
 
Numbers Only

Length of 60 Red "C" Struts

0' 0"

.34862

 
 
Numbers Only

Sphere Diameter

0' 0"

 
 
Numbers Only

Sphere Equator Circumference

0' 0"

 
 

12

Number of Red 5-Way Hubs

 

80

Number of Blue 6-Way Hubs

 

92

Number of Center Rings

 

540

Number of Zip Ties to Construct the Sphere

 

0

Sphere Surface Area (Square )

 

0

Sphere Volume (Cubic )

 

0

Total Length of All Struts Added Together ()

Cost Calculation and Material Utilization Chart

 

 
 

Length of Pipe:

Cost Per Pipe:

 
 
Blue "A" Struts
 
 

Blue "A" Strut Units Entered:

0

Feet and Inches:

0'0"

 
 

Number of Pipes needed to Create (120) Blue "A" Struts:

0

 
 

Number of Blue "A" Struts Produced From Each Uncut Pipe:

0

 
 

Waste for First 0 Pipes after Cutting 0 Struts Each:

0 = 00"

 
 

<-

 
 

Number of Blue "A" Struts Created from the first 0 Pipes:

0

 
 

Number of Blue "A" Struts Created from the Last Pipe:

0

 
 

Waste on the Last Pipe after Cutting 0 Strut(s):

0

 
 

<-

 
 

Total Waste in Creating 120 Blue "A" Struts:

0

 
 
Yellow "B" Struts
 
 

Yellow "B" Strut Units Entered:

0

Feet and Inches:

00"

 
 

Number of Pipes needed to Create (90) Yellow "B" Struts:

0

 
 

Number of Yellow "B" Struts Produced From Each Uncut Pipe:

0

 
 

Waste for First 0 Pipes after Cutting 0 Struts Each:

0 = 00"

 
 

<-

 
 

Number of Yellow "B" Struts Created from the first 0 Pipes:

0

 
 

Number of Yellow "B" Struts Created from the Last Pipe:

0

 
 

Waste on the Last Pipe after Cutting 0 Strut(s):

0

 
 

<-

 
 

Total Waste in Creating 90 Yellow "B" Struts:

0

 
 

Red "C" Struts

 
 

Red "C" Strut Units Entered:

0

Feet and Inches:

0'0"

 
 

Number of Pipes needed to Create (60) Red "C" Struts:

0

 
 

Number of Red "C" Struts Produced From Each Uncut Pipe:

0

 
 

Waste for First 0 Pipes after Cutting 0 Struts Each:

0 = 00"

 
 

<-

 
 

Number of Red "C" Struts Created from the first 0 Pipes:

0

 
 

Number of Red "C" Struts Created from the Last Pipe:

0

 
 

Waste on the Last Pipe after Cutting 0 Strut(s):

0

 
 

<-

 
 

Total Waste in Creating 60 Red "C" Struts:

0

 
 

COST OF MATERIALS GRAND TOTALS:

 
 

Total Waste for All Struts:

0

 
 

Number of Uncut Pipe/Materials Needed:

0

 
 

Total Cost of Materials @ $4.50 Each:

$

 

Sphere Weight Chart

 
Weight Chart 1" PVC Sch.40 1" PVC Sch.80 1.5" PVC Sch.40 2" PVC Sch.40 3/4" EMT 1" EMT 5/8" Iron Rebar #5 3/4" Iron Rebar #6 1/2" Basalt Rebar #4 5/8" Basalt Rebar #5
Lbs Per Linear Ft .32 .41 .51 .68 .435 .64 1.043 1.502 .237 .46
120 Blue "A" Struts 0 0 0 0 0 0 0 0 0 0
90 Yellow "B" Struts 0 0 0 0 0 0 0 0 0 0
60 Red "C" Struts 0 0 0 0 0 0 0 0 0 0
Total Weight of Struts (lbs) 0 0 0 0 0 0 0 0 0 0
Weight of Hubs, Rings, Zip Ties 34.6 34.6 86.0 154.2 34.6 34.6 34.6 34.6 34.6 34.6
Total Sphere Weight (lbs) 0 0 0 0 0 0 0 0 0 0

3 Frequency Tessellation Diagram

3v Geodesic Sphere Tessellation Diagram

 

Blue "A" Chord Factor:   .41241

Yellow "B" Chord Factor:   .40355

Red "C" Chord Factor:   .34862

Sphere Panels / Coverings

 

A 3v 3/8 Sphere Will Require Panels / Coverings for:

 

 

60 C-B-C Isoceles Triangles

150 A-B-A Isoceles Triangles

 
 

C-B-C Triangles

A-B-A Triangles

 

Total Triangles: 210

--------------------------------------------

 

Triangle Dimensions

 

60 C-B-C Isoceles Triangles

 
C-B-C Triangle
Base = "B"
C-B-C Triangles
Altitude Xb Decimal 0
Feet and Inches 0 0"
 
C-B-C Triangle
Base = "C"
C-B-C Triangles
Altitude Xc Decimal 0
Feet and Inches 0 0"
 
 
C-B-C
Triangle
Edge
Measurement Strut
Length
Center Ring
Hub Width
Triangle Edge
Total Length

B

Decimal 0 0 0
Feet and Inches 0 0" 0" 0 0"

C

Decimal 0 0 0
Feet and Inches 0 0" 0" 0 0"
 
Surface Area for Each C-B-C Triangle 0 Square

 

150 A-B-A Isoceles Triangles

 
A-B-A Triangle
Base = "B"
A-B-A Triangles
Altitude Xb Decimal 0
Feet and Inches 0 0"
 
A-B-A Triangle
Base = "A"
A-B-A Triangles
Altitude Xa Decimal 0
Feet and Inches 0 0"
 
 
A-B-A
Triangle
Edge
Measurement Strut
Length
Center Ring
Hub Width
Triangle Edge
Total Length

A

Decimal 0 0 0
Feet and Inches 0 0" 0" 0 0"

B

Decimal 0 0 0
Feet and Inches 0 0" 0" 0 0"
 
Surface Area for Each A-B-A Triangle 0 Square

This Sphere Calculator was written in November 2017

by johnhurt.com

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Address To The Unco Guid, Or The Rigidly Righteous

My Son, these maxims make a rule,
An' lump them aye thegither;
The Rigid Righteous is a fool,
The Rigid Wise anither:

Then gently scan your brother man,
Still gentler sister woman;
Though they may gang a' kennin' wrang
To step aside is human.

Robert Burns - 1786

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