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Ramp radius

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rhodalinsky
Posted: Thu May 04, 2017 10:02 am Reply with quote
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Joined: 06 Jan 2006 Posts: 1940 Location: MN
Not a lot of traffic in the ramp section and I want a bunch of input so... Gonna build a 3'4"x 16' mini halfpipe in the back for my 12yr old. Looking for input on radius of the transition. I was thinking 7.5'?? Also looking for input on ramp surface. I am thinking of three different options. one layer of 3/8" plywood then 1/4" sanded birch, or one layer of 3/8" and then a top layer of sanded 3/8" plywood, or one layer of 1/2" and then 1/4" sanded birch.
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skateight
Posted: Thu May 04, 2017 3:11 pm Reply with quote
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Joined: 05 Sep 2006 Posts: 2857 Location: Earth
The 1/2 inch with 1/4 sanded birch is about the thinnest I'd go with.
That may actually be too thin.
( would be for my fat ass! )
How far apart are you spacing the 2x4's?
7.5 for the tranny is also as low as I would go.
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rhodalinsky
Posted: Fri May 05, 2017 6:47 am Reply with quote
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Joined: 06 Jan 2006 Posts: 1940 Location: MN
8" spacing on the 2x4's

Any other transition length you would do?

As for the layers. Mainly young(light) skaters on it. I can always add another layer in a couple years if needed.
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warehouse
Posted: Fri May 05, 2017 8:48 am Reply with quote
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Joined: 23 Jan 2004 Posts: 2014 Location: British Columbia
I'd go 2 layers of 3/8 and 6.5-7' radius.1/4" birch will be a good riding Surface. A little steeper will be faster and a 12 yr old is gonna get really good in a couple years of regular skating. They'll get bored if the ramp is too mellow
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rhodalinsky
Posted: Tue May 09, 2017 8:46 am Reply with quote
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Alright, here is the plan so far. Materials being delivered tomorrow. 3'5" high with a 6'10" transition. 16' wide with 2 3/8" OD steel coping. Extension on one side (don't know width and height yet). One layer 1/2" and the top layer sanded 1/4" I will be painting the whole thing tan/brown. Going in between some trees and over a perennial garden. Pictures to come.
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rhodalinsky
Posted: Tue May 23, 2017 10:49 am Reply with quote
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Joined: 06 Jan 2006 Posts: 1940 Location: MN
Went with 7' radius. This is the first layer of 1/2". Boy had to try it out. Sits nicely in the yard.




Tarped in the back


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warehouse
Posted: Tue May 23, 2017 5:56 pm Reply with quote
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Joined: 23 Jan 2004 Posts: 2014 Location: British Columbia
What a great setting. 7 ft radius is nice, you can add on more height and it'll be even better:)
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Buddur
Posted: Tue May 23, 2017 8:09 pm Reply with quote
Joined: 04 Aug 2012 Posts: 1095 Location: Western Pennsylvania
Nice addition to the yard.

And that much less grass to mow.

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big.kahuna.burger
Posted: Wed May 24, 2017 1:39 am Reply with quote
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Joined: 19 Jan 2002 Posts: 15613 Location: Melbs dude... Melbs
nice one. theres a few years of fun in that.

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jchan
Posted: Wed May 24, 2017 8:23 am Reply with quote
Joined: 19 Apr 2005 Posts: 3009 Location: SE
Looks good, but I would add another leca block (support thing, not sure if it's the american name) under the transitions or you'll stand the risk that anyone heavier than that kid will stomp them off and it would be a nightmare to fix after the fact.


Last edited by jchan on Wed May 24, 2017 8:35 am; edited 1 time in total
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