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Geodesic Tunnel Dome 11 Extensions Calculator

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Geodesic Tunnel Dome 11 Extensions Calculator

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Geodesic Tunnel Dome 11 Extensions Calculator

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How to Use the Dome 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 dome vertex.
For most dome construction methods, you will use the "No Hubs" selection.
With our Zip Tie Domes Hub Design, the geodesic dome 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 dome 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 dome, 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.

Geodesic Tunnel Dome 11 Extensions Calculator

This tunnel dome design was devised by Gerry Toomey, a dome consultant in Quebec, Canada, and is used here with his permission. Click here to contact Mr. Toomey.

Geodesic Tunnel Dome 11 Extensions Calculator

Tunnel Dome Calculator 11 Extensions
Tunnel Dome 11 Ext.
 
Select Hub Size
No Hubs:     Standard 4" Hubs:     Super 6" Hubs:     Mega 8" Hubs:
Feet:   Meters:
 
Convert to Feet & Inches
Chord
 
 
Enter the Number of in One Field, then Click the "Calculate" Button.
 
 
 

Tunnel Dome Height

0 0"

 
 

Tunnel Dome Width / Diameter

0 0"

 
 

Length of 232 Blue "A" Struts

0 0"

 

 
 

Length of 26 Black "B" Struts

0 0"

 

 
 

Length of 30 Red "C" Struts

0 0"

 

 
 

Length of 8 Yellow "D" Struts

0 0"

 

 
 

Length of 52 Purple Support "E" Struts

0 0"

 

 
 

Tunnel Dome Radius

0 0"

 
 

Tunnel Dome Perimeter Length

0 0"

 
 

Tunnel Dome Floor Area in Square

 

0

Tunnel Dome Surface Area in Square

 

0

Tunnel Dome Volume in Cubic

 

0

Dome Base Perimeter Number of Sides

 

0

0 Sided Base Perimeter Length ()

 

0

0 Sided Base Floor Area (Square )

 

186

Total Number of Dome Panels / Faces

 

0

Surface Area for 186 Dome Panels / Faces (Square )

 

0

Total Volume of Tetrahedrons behind 186 Dome Panels / Faces in Cubic

 

0

Tunnel Dome Length ()

 

6

Number of Red 72° 5-Way Hubs

 

32

Number of Blue 60° 6-Way Hubs

 

73

Number of Purple Support 60° 6-Way Hubs

 

52

Number of Optional Side Support Brace Struts

 

0

Optional Side Support Brace Strut Length ()

 

208

Number of Support Strut Zip Ties

 

111

Number of Center Rings

 

592

Number of Zip Ties to Construct the Tunnel Dome

 

333

Number of Zip Ties to Secure the Inside Dual Covering Hubs (3 per hub)

 

333

Number of Zip Ties to Secure the Outside Dual Covering Hubs (3 per hub)

 

0 Length
0 Width  

Absolute Minimum Square Covering Dimensions for a Tightly Fitted Tunnel Dome Cover

 

0 Length
0 Width  

Minimum Square Covering Dimensions for a Tunnel Dome Cover Secured to the Hubs with Zip Ties with a Minimum Overlap at the Bottom of the Tunnel Dome

 

0 Length
0 Width  

Maximum Square Covering Dimensions for a Tunnel Dome Cover Secured to the Hubs with Zip Ties with an Ample Overlap at the Bottom of the Dome

 

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:

00"

 
 

Number of Pipes needed to Create (232) 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 232 Blue "A" Struts:

0

 
 
Black "B" Struts
 

 

Black "B" Strut Units Entered:

0

Feet and Inches:

00"

 
 

Number of Pipes needed to Create (26) Black "B" Struts:

0

 
 

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

0

 
 

Waste for First 0 Pipes after Cutting 0 Struts Each:

0 = 00"

 
 

<-

 
 

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

0

 
 

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

0

 
 

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

0

 
 

<-

 
 

Total Waste in Creating 26 Black "B" Struts:

0

 
 
Red "C" Struts
 

 

Red "C" Strut Units Entered:

0

Feet and Inches:

00"

 
 

Number of Pipes needed to Create (30) 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 30 Red "C" Struts:

0

 
 
Yellow "D" Struts
 

 

Yellow "D" Strut Units Entered:

0

Feet and Inches:

00"

 
 

Number of Pipes needed to Create (8) Yellow "D" Struts:

0

 
 

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

0

 
 

Waste for First 0 Pipes after Cutting 0 Struts Each:

0 = 00"

 
 

<-

 
 

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

0

 
 

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

0

 
 

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

0

 
 

<-

 
 

Total Waste in Creating 8 Yellow "D" Struts:

0

 
 
Purple Support "E" Struts
 

 

Purple Support "E" Strut Units Entered:

0

Feet and Inches:

00"

 
 

Number of Pipes needed to Create (52) Purple Support "E" Struts:

0

 
 

Number of Purple Support "E" Struts Produced From Each Uncut Pipe:

0

 
 

Waste for First 0 Pipes after Cutting 0 Struts Each:

0 = 00"

 
 

<-

 
 

Number of Purple Support "E" Struts Created from the first 0 Pipes:

0

 
 

Number of Purple Support "E" Struts Created from the Last Pipe:

0

 
 

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

0

 
 

<-

 
 

Total Waste in Creating 52 Purple Support "E" 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:

$

 

Tunnel Dome Weight Chart

 
Weight Chart 3/4" PVC 1" PVC 1.25" PVC 1.5" PVC 3/4" EMT 1" EMT 1.25" EMT 1.5" EMT 1" Bamboo 1.5" Bamboo
Lbs Per Linear Ft .21 .32 .43 .51 .43 .64 .95 1.10 .2 .4
232 Blue "A" Struts 0 0 0 0 0 0 0 0 0 0
26 Black "B" Struts 0 0 0 0 0 0 0 0 0 0
30 Red "C" Struts 0 0 0 0 0 0 0 0 0 0
8 Yellow "D" Struts 0 0 0 0 0 0 0 0 0 0
52 Purple Support "E" 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 0 0 0 0 0 0 0 0 0 0
Total Tunnel Dome Weight (lbs) 0 0 0 0 0 0 0 0 0 0
 

Geodesic Tunnel Dome 11 Extensions Construction Diagram

 

Tunnel Dome 11 - End/Width Diagram
Tunnel Dome 11 - End/Width Diagram

 

Tunnel Dome 11 - Length Diagram
Tunnel Dome 11 - Length Diagram

 

Tunnel Dome 11 - Top Down Diagram
Tunnel Dome 11 - Top Down Diagram

 

Geodesic Tunnel Dome 11 Extensions Tessellation Diagram

Geodesic Tunnel Dome 11 Extensions Tessellation Diagram

 

Blue "A" Chord Factor:    

Black "B" Chord Factor:    

Red "C" Chord Factor:    

Yellow "D" Chord Factor:    

Purple Support "E" Chord Factor:    

Tunnel Dome Panels / Coverings

 

A Geodesic Tunnel Dome 11 Extensions Will Require Panels / Coverings for:

 

 

138 A-A-A Equilateral Triangles

6 A-B-A Isosceles Triangles

 
 

 
 

30 C-B-C Isosceles Triangles

12 A-B-D Scalene Triangles

 
 

 

Total Triangles: 186

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

 

Triangle Dimensions

 

138 A-A-A Equilateral Triangles

 
A-A-A Triangle
Base = "A"
Altitude A Decimal 0
Feet and Inches 0 0"
 
 
A-A-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"
 
Surface Area for Each A-A-A Triangle 0 Square

 

6 A-B-A Isosceles Triangles

 
A-B-A Triangle
Base = "A"
Altitude A Decimal 0
Feet and Inches 0 0"
 
A-B-A Triangle
Base = "B"
Altitude B 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

 

30 C-B-C Isosceles Triangles

 
C-B-C Triangle
Base = "B"
Altitude B Decimal 0
Feet and Inches 0 0"
 
C-B-C Triangle
Base = "C"
Altitude C 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

 

12 A-B-D Scalene Triangles

A-B-D Triangle
Base = "A"
Altitude A Decimal 0
Feet and Inches 0 0"
A-B-D Triangle
Base = "B"
Altitude B Decimal 0
Feet and Inches 0 0"
A-B-D Triangle
Base = "D"
Altitude D Decimal 0
Feet and Inches 0 0"
 
A-B-D
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"

D

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

 


Geodesic Tunnel Dome 11 Extensions Calculator generated by PERL on Monday, August 14, 2023.
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Flag of Scotland
Alba gu bráth - Scotland Until Judgment

Tam O' Shanter

When chapman billies leave the street,
And drouthy neibors, neibors, meet;
As market days are wearing late,
And folk begin to tak the gate,
While we sit bousing at the nappy,
An' getting fou and unco happy,
We think na on the lang Scots miles,
The mosses, waters, slaps and stiles,
That lie between us and our hame,
Where sits our sulky, sullen dame,
Gathering her brows like gathering storm,
Nursing her wrath to keep it warm.

This truth fand honest Tam o' Shanter,
As he frae Ayr ae night did canter:
(Auld Ayr, wham ne'er a town surpasses,
For honest men and bonie lasses).

O Tam! had'st thou but been sae wise,
As taen thy ain wife Kate's advice!
She tauld thee weel thou was a skellum,
A blethering, blustering, drunken blellum;
That frae November till October,
Ae market-day thou was na sober;
That ilka melder wi' the Miller,
Thou sat as lang as thou had siller;
That ev'ry naig was ca'd a shoe on
The Smith and thee gat roarin' fou on;
That at the Lord's house, ev'n on Sunday,
Thou drank wi' Kirkton Jean till Monday,
She prophesied that late or soon,
Thou wad be found, deep drown'd in Doon,
Or catch'd wi' warlocks in the mirk,
By Alloway's auld, haunted kirk.

Ah, gentle dames! it gars me greet,
To think how mony counsels sweet,
How mony lengthen'd, sage advices,
The husband frae the wife despises!

But to our tale: Ae market night,
Tam had got planted unco right,
Fast by an ingle, bleezing finely,
Wi reaming sAats, that drank divinely;
And at his elbow, Souter Johnie,
His ancient, trusty, drougthy crony:
Tam lo'ed him like a very brither;
They had been fou for weeks thegither.
The night drave on wi' sangs an' clatter;
And aye the ale was growing better:
The Landlady and Tam grew gracious,
Wi' favours secret, sweet, and precious:
The Souter tauld his queerest stories;
The Landlord's laugh was ready chorus:
The storm without might rair and rustle,
Tam did na mind the storm a whistle.

Care, mad to see a man sae happy,
E'en drown'd himsel amang the nappy.
As bees flee hame wi' lades o' treasure,
The minutes wing'd their way wi' pleasure:
Kings may be blest, but Tam was glorious,
O'er a' the ills o' life victorious!

But pleasures are like poppies spread,
You seize the flow'r, its bloom is shed;
Or like the snow falls in the river,
A moment white-then melts for ever;
Or like the Borealis race,
That flit ere you can point their place;
Or like the Rainbow's lovely form
Evanishing amid the storm. -
Nae man can tether Time nor Tide,
The hour approaches Tam maun ride;
That hour, o' night's black arch the key-stane,
That dreary hour he mounts his beast in;
And sic a night he taks the road in,
As ne'er poor sinner was abroad in.

The wind blew as 'twad blawn its last;
The rattling showers rose on the blast;
The speedy gleams the darkness swallow'd;
Loud, deep, and lang, the thunder bellow'd:
That night, a child might understand,
The deil had business on his hand.

Weel-mounted on his grey mare, Meg,
A better never lifted leg,
Tam skelpit on thro' dub and mire,
Despising wind, and rain, and fire;
Whiles holding fast his gude blue bonnet,
Whiles crooning o'er some auld Scots sonnet,
Whiles glow'rin round wi' prudent cares,
Lest bogles catch him unawares;
Kirk-Alloway was drawing nigh,
Where ghaists and houlets nightly cry.

By this time he was cross the ford,
Where in the snaw the chapman smoor'd;
And past the birks and meikle stane,
Where drunken Charlie brak's neck-bane;
And thro' the whins, and by the cairn,
Where hunters fand the murder'd bairn;
And near the thorn, aboon the well,
Where Mungo's mither hang'd hersel'.
Before him Doon pours all his floods,
The doubling storm roars thro' the woods,
The lightnings flash from pole to pole,
Near and more near the thunders roll,
When, glimmering thro' the groaning trees,
Kirk-Alloway seem'd in a bleeze,
Thro' ilka bore the beams were glancing,
And loud resounded mirth and dancing.

Inspiring bold John Barleycorn!
What dangers thou canst make us scorn!
Wi' tippenny, we fear nae evil;
Wi' usquabae, we'll face the devil!
The swats sae ream'd in Tammie's noddle,
Fair play, he car'd na deils a boddle,
But Maggie stood, right sair astonish'd,
Till, by the heel and hand admonish'd,
She ventur'd forward on the light;
And, wow! Tam saw an unco sight!

Warlocks and witches in a dance:
Nae cotillon, brent new frae France,
But hornpipes, jigs, strathspeys, and reels,
Put life and mettle in their heels.
A winnock-bunker in the east,
There sat auld Nick, in shape o' beast;
A towzie tyke, black, grim, and large,
To gie them music was his charge:
He screw'd the pipes and gart them skirl,
Till roof and rafters a' did dirl. -
Coffins stood round, like open presses,
That shaw'd the Dead in their last dresses;
And (by some devilish cantraip sleight)
Each in its cauld hand held a light.
By which heroic Tam was able
To note upon the haly table,
A murderer's banes, in gibbet-airns;
Twa span-lang, wee, unchristened bairns;
A thief, new-cutted frae a rape,
Wi' his last gasp his gabudid gape;
Five tomahawks, wi' blude red-rusted:
Five scimitars, wi' murder crusted;
A garter which a babe had strangled:
A knife, a father's throat had mangled.
Whom his ain son of life bereft,
The grey-hairs yet stack to the heft;
Wi' mair of horrible and awfu',
Which even to name wad be unlawfu'.
Three lawyers tongues, turned inside oot,
Wi' lies, seamed like a beggars clout,
Three priests hearts, rotten, black as muck,
Lay stinkin, vile in every neuk.

As Tammie glowr'd, amaz'd, and curious,
The mirth and fun grew fast and furious;
The Piper loud and louder blew,
The dancers quick and quicker flew,
The reel'd, they set, they cross'd, they cleekit,
Till ilka carlin swat and reekit,
And coost her duddies to the wark,
And linkit at it in her sark!

Now Tam, O Tam! had they been queans,
A' plump and strapping in their teens!
Their sarks, instead o' creeshie flainen,
Been snaw-white seventeen hunder linen!-
Thir breeks o' mine, my only pair,
That ance were plush o' guid blue hair,
I wad hae gien them off my hurdies,
For ae blink o' the bonie burdies!
But wither'd beldams, auld and droll,
Rigwoodie hags wad spean a foal,
Louping an' flinging on a crummock.
I wonder did na turn thy stomach.

But Tam kent what was what fu' brawlie:
There was ae winsome wench and waulie
That night enlisted in the core,
Lang after ken'd on Carrick shore;
(For mony a beast to dead she shot,
And perish'd mony a bonie boat,
And shook baith meikle corn and bear,
And kept the country-side in fear);
Her cutty sark, o' Paisley harn,
That while a lassie she had worn,
In longitude tho' sorely scanty,
It was her best, and she was vauntie.
Ah! little ken'd thy reverend grannie,
That sark she coft for her wee Nannie,
Wi twa pund Scots ('twas a' her riches),
Wad ever grac'd a dance of witches!

But here my Muse her wing maun cour,
Sic flights are far beyond her power;
To sing how Nannie lap and flang,
(A souple jade she was and strang),
And how Tam stood, like ane bewithc'd,
And thought his very een enrich'd:
Even Satan glowr'd, and fidg'd fu' fain,
And hotch'd and blew wi' might and main:
Till first ae caper, syne anither,
Tam tint his reason a thegither,
And roars out, "Weel done, Cutty-sark!"
And in an instant all was dark:
And scarcely had he Maggie rallied.
When out the hellish legion sallied.

As bees bizz out wi' angry fyke,
When plundering herds assail their byke;
As open pussie's mortal foes,
When, pop! she starts before their nose;
As eager runs the market-crowd,
When "Catch the thief!" resounds aloud;
So Maggie runs, the witches follow,
Wi' mony an eldritch skreich and hollow.

Ah, Tam! Ah, Tam! thou'll get thy fairin!
n hell, they'll roast thee like a herrin!
In vain thy Kate awaits thy comin!
Kate soon will be a woefu' woman!
Now, do thy speedy-utmost, Meg,
And win the key-stone o' the brig;
There, at them thou thy tail may toss,
A running stream they dare na cross.
But ere the keystane she could make,
The fient a tail she had to shake!
For Nannie, far before the rest,
Hard upon noble Maggie prest,
And flew at Tam wi' furious ettle;
But little wist she Maggie's mettle!
Ae spring brought off her master hale,
But left behind her ain grey tail:
The carlin claught her by the rump,
And left poor Maggie scarce a stump.

Now, wha this tale o' truth shall read,
Ilk man and mother's son, take heed:
Whene'er to Drink you are inclin'd,
Or Cutty-sarks rin in your mind,
Think ye may buy the joys o'er dear;
Remember Tam o' Shanter's mare.

Robert Burns - 1790

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