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.
Length of Pipe:
Cost Per Pipe:
Blue "A" Strut Units Entered:
0
Feet and Inches:
0'0"
Number of Pipes needed to Create (80) 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 80 Blue "A" Struts:
0
Yellow "B" Strut Units Entered:
0
Feet and Inches:
00"
Number of Pipes needed to Create (55) 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 55 Yellow "B" Struts:
0
Red "C" Strut Units Entered:
0
Feet and Inches:
0'0"
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
Total Waste for All Struts:
0
Number of Uncut Pipe/Materials Needed:
0
Total Cost of Materials @ $4.50 Each:
$
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 |
80 Blue "A" Struts | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
55 Yellow "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 |
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 Dome Weight (lbs) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Blue "A" Chord Factor: .41241
Yellow "B" Chord Factor: .40355
Red "C" Chord Factor: .34862
--------------------------------------------
Altitude Xb | Decimal | 0 |
---|---|---|
Feet and Inches | 0 0" |
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 |
---|
Altitude Xb | Decimal | 0 |
---|---|---|
Feet and Inches | 0 0" |
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 |
---|
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Labor omnia vincit
And you cannot sleep for thinking how you'll reach to-morrow night,
You may be a man of sorrows, and on speaking terms with Care,
And as yet be unacquainted with the Demon of Despair;
For I rather think that nothing heaps the trouble on your mind
Like the knowledge that your trousers badly need a patch behind.
I have noticed when misfortune strikes the hero of the play,
That his clothes are worn and tattered in a most unlikely way;
And the gods applaud and cheer him while he whines and loafs around,
And they never seem to notice that his pants are mostly sound;
But, of course, he cannot help it, for our mirth would mock his care,
If the ceiling of his trousers showed the patches of repair.
You are none the less a hero if you elevate your chin
When you feel the pavement wearing through the leather, sock, and skin;
You are rather more heroic than are ordinary folk
If you scorn to fish for pity under cover of a joke;
You will face the doubtful glances of the people that you know;
But -- of course, you're bound to face them when your pants begin to go.
If, when flush, you took your pleasures -- failed to make a god of Pelf,
Some will say that for your troubles you can only thank yourself --
Some will swear you'll die a beggar, but you only laugh at that,
While your garments hand together and you wear a decent hat;
You may laugh at their predictions while your soles are wearing low,
But -- a man's an awful coward when his pants begin to go.
Though the present and the future may be anything but bright,
It is best to tell the fellows that you're getting on all right,
And a man prefers to say it -- 'tis a manly lie to tell,
For the folks may be persuaded that you're doing very well;
But it's hard to be a hero, and it's hard to wear a grin,
When your most important garment is in places very thin.
Get some sympathy and comfort from the chum who knows you best,
That your sorrows won't run over in the presence of the rest;
There's a chum that you can go to when you feel inclined to whine,
He'll declare your coat is tidy, and he'll say: `Just look at mine!'
Though you may be patched all over he will say it doesn't show,
And he'll swear it can't be noticed when your pants begin to go.
Brother mine, and of misfortune! times are hard, but do not fret,
Keep your courage up and struggle, and we'll laugh at these things yet,
Though there is no corn in Egypt, surely Africa has some --
Keep your smile in working order for the better days to come!
We shall often laugh together at the hard times that we know,
And get measured by the tailor when our pants begin to go.
......
Now the lady of refinement, in the lap of comfort rocked,
Chancing on these rugged verses, will pretend that she is shocked.
Leave her to her smelling-bottle; 'tis the wealthy who decide
That the world should hide its patches 'neath the cruel look of pride;
And I think there's something noble, and I swear there's nothing low,
In the pride of Human Nature when its pants begin to go.
.
Henry Lawson