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Help with a geometry problem
Posted: Sat May 14, 2011 9:08 pm
by jcraigie
I want to put a wood bottom under my pool. Using 3/4" 4' x 8' treated plywood with 2 x 4's to hold the pieces together. It's a 24' round pool (24' across). Using the largest possible piece's how would you piece this together? Any and all ideas are appreciated.
Posted: Sat May 14, 2011 10:41 pm
by JPG
jcraigie wrote:I want to put a wood bottom under my pool. Using 3/4" 4' x 8' treated plywood with 2 x 4's to hold the pieces together. It's a 24' round pool (24' across). Using the largest possible piece's how would you piece this together? Any and all ideas are appreciated.
You will not gain much by making it 'round'.
However make it an octagon with 10' sides would be 24' 3.5" across.(9'11'' = 23'11+")
Requires 17 4x8 sheets with scrap totaling 1' x 2'(4 triangular pieces 1' x 1' x 16.9)".
I would frame it on 2' centers.
Posted: Sat May 14, 2011 11:19 pm
by beeg
How many gallons of water does your pool hold? Take that number times 8.3 and that will be the number of pounds on the plywood.
Posted: Sat May 14, 2011 11:19 pm
by beeg
How many gallons of water does your pool hold? Take that number times seven and that will be the number of pounds on the plywood.
Posted: Sat May 14, 2011 11:25 pm
by mrhart
These guys are such know-it-alls
Yea.. I knew all that stuff too, I was thinkin more like "just use one crosscut of a really big tree"
Ha, one piece--No scrap!
Posted: Sat May 14, 2011 11:31 pm
by pessen
I agree that making a round base to exactly fit the base of your pool won't save you much, and will make it harder to frame in with 2x4's or whatever you decide to use.
Attached is a power point of two configurations, first where you make it exactly round, and second where you do the 10' octagon. The second seems to make more sense as far as ease of framing it in because you have all straight edges. Attached are screengrabs of two powerpoint visualizations. The lightest pink areas are where the cutoffs would be. The drawings are to scale.
Hope this helps.
pessen
[ATTACH]13023[/ATTACH]
[ATTACH]13024[/ATTACH]
Posted: Sat May 14, 2011 11:56 pm
by jcraigie
Pessen -That's perfect! Thank you.
One giant slice of tree, hmmm, let me know when you find that ok:rolleyes:
The wood will be placed on top of a sand base, with the sheets of plywood butted together over 2 x 4's so the weight distribution should be ok.
beeg - actually water weighs 8.3 pounds
Posted: Sat May 14, 2011 11:59 pm
by JPG
pessen wrote:I agree that making a round base to exactly fit the base of your pool won't save you much, and will make it harder to frame in with 2x4's or whatever you decide to use.
Attached is a power point of two configurations, first where you make it exactly round, and second where you do the 10' octagon. The second seems to make more sense as far as ease of framing it in because you have all straight edges. Attached are screengrabs of two powerpoint visualizations. The lightest pink areas are where the cutoffs would be. The drawings are to scale.
Hope this helps.
pessen
[ATTACH]13023[/ATTACH]
[ATTACH]13024[/ATTACH]
Crudely edited, but my thoughts! Duplicate bottom right corner for all four corners.
[ATTACH]13025[/ATTACH]