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Old 07-15-2012, 05:14 PM   #1
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How much dirt to fill a half sphere ?


so we bought a house that came with an in-ground trampoline (!). When I pulled it out, we are left with a hole that is 15 feet in diameter and 4 ft deep in the center. So it's not really half a sphere or it would be 15ft deep in the middle right? how much to I need to fill this thing ?

found a ton of fill calculators on the web but nothing that really handles this.

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Old 07-15-2012, 05:17 PM   #2
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How much dirt to fill a half sphere ?


Dirt? In ground trampoline sounds awesome! Get another one

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Old 07-15-2012, 05:25 PM   #3
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How much dirt to fill a half sphere ?


haha .. sorry, it's gotta go! never mind that they also cut through the buried telephone wire when they dug the hole. not sure what they were using for a phone, we have to get Bell to run a new line.
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Old 07-15-2012, 06:27 PM   #4
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How much dirt to fill a half sphere ?


http://en.wikipedia.org/wiki/Spherical_cap
About 386cuft or 14.3cubic yards, or about a dump truck of fill and a good layer of topsoil.
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Old 07-15-2012, 06:46 PM   #5
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How much dirt to fill a half sphere ?


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Originally Posted by shazapple View Post
http://en.wikipedia.org/wiki/Spherical_cap
About 386cuft or 14.3cubic yards, or about a dump truck of fill and a good layer of topsoil.
I actually got 386.94cu/ft and 14.33cu/yards. Id hate for them to come up short




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Old 07-15-2012, 06:57 PM   #6
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How much dirt to fill a half sphere ?


Sorry Jimmy, I assumed the top soil that stuck to the bottom of their boots would make up for that extra 0.03 cubic yards
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Old 07-15-2012, 07:13 PM   #7
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How much dirt to fill a half sphere ?


cool... never thought to look it up like that... didn't really dawn on me that it wasn't "half" a sphere until i started typing my original post.

i would have had WAY too much dirt... could have made a mound
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Old 07-15-2012, 07:25 PM   #8
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How much dirt to fill a half sphere ?


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Originally Posted by ChezSean View Post
haha .. sorry, it's gotta go! never mind that they also cut through the buried telephone wire when they dug the hole. not sure what they were using for a phone, we have to get Bell to run a new line.
Cellphone, or digital phone through the catv provider.

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