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-   -   How much dirt to fill a half sphere ? (http://www.diychatroom.com/f16/how-much-dirt-fill-half-sphere-150368/)

ChezSean 07-15-2012 06:14 PM

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.

CopperClad 07-15-2012 06:17 PM

Dirt? In ground trampoline sounds awesome! Get another one :thumbsup:

ChezSean 07-15-2012 06:25 PM

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.

shazapple 07-15-2012 07:27 PM

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.

jimmy21 07-15-2012 07:46 PM

Quote:

Originally Posted by shazapple (Post 966513)
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




:laughing:

shazapple 07-15-2012 07:57 PM

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 :lol:

ChezSean 07-15-2012 08:13 PM

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 :)

gregzoll 07-15-2012 08:25 PM

Quote:

Originally Posted by ChezSean (Post 966445)
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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