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  • HOW TO BUILD A HALF PIPE
  • ABOUT
  • ITEM SHOP
  • GALLERY
    • Pictures
    • Videos
  • BLOG
  • MERCHANDISE
  • CONTACT
  royalrampsandrails

Half Pipe - Design Step 4

2/1/2013

7 Comments

 
Transition…the most import part of the half pipe. The transition is the curved section of the ramp that goes from the flat bottom to the deck. Getting this right is crucial because a transition that is too steep or to mellow will not be fun to skate and your half pipe will turn into a giant lawn ornament. There is no equation for the perfect transition radius, the best thing to do is to draw out several different radii in full scale and select which one looks best to you. You could even draw and cut a few out on some cardboard and compare it to some local ramps or bowls in your area. I used computer software to design mine, but I’m still going to draw it out and think about it long and hard before I cut it out. Currently it’s a 7 foot radius. The radius should always be bigger than the height of the half pipe and the larger it gets the mellower it will be.  

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7 Comments
Joffrey
2/7/2013 03:56:03 am

I'm also thinking of building a 5ft ramp in my garden. If I would use a 8ft flat, a radius of 8ft should I be able to get away with 6 sheets of ply for 1 layer? I'm struggling to calculate the length of the arc of a 5ft ramp. What is the length I would need to cover coping to coping using the above measurements? Nice blog btw :) Cheers

Reply
B-Clark
2/7/2013 05:31:45 am

Hey, thanks for the comment. With those measurements your arc length would be just under 9ft-6in, so 6 sheets wouldn't make it coping to coping. You would have to get a seventh sheet to fill the gaps. You can calculate the arc length with the following formula.

Arc Length = Central Angle/360 x (2 x 3.14 x radius)

So for your ramp it would look like this:

= 67.8/360 x (2 x 3.14 x 8)

= 0.1883 x 50.24

= 9.46

If you need help finding the Central Angle, just let me know.

Reply
Joffrey
2/9/2013 08:32:13 pm

Thanks.

That was my struggle (still is) how to find that central angle. I knew I needed that but its been a long long time with the maths :) (20+ years)

25+ last time I skated hehe

Reply
B-Clark
2/12/2013 01:20:44 am

I've had a couple other people ask this question so I'm going to make a post about it. Check back soon.

Your never to old to skate.

Reply
Joffrey
2/22/2013 08:43:45 pm

Do you think I can get away with 10ft width with only 2 sides or is 8ft the max?

Reply
brandon clark
2/24/2013 09:57:23 pm

I would not go bigger than 6' wide without having some middle support.

Reply
ErikMM
9/6/2023 04:08:12 am

I’m curious if the “best” transition might be an isochronus curve, the fastest curve possible, that way you don’t kill your energy pumping for speed. Also, it is more elliptical or just typically better than a circle.

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    HOW TO DESIGN A HALF PiPE

    All
    3. FRAMING THE FLAT
    4. CUTTING THE TRANSITIONS OUT
    5. STAIN THE TRANSITION
    5.) Transition Studs
    6. BUILD THE TRANSITIONS
    Art
    Half Pipe
    New Designs

    HOw TO BUILD a half pipe

    All
    3. FRAMING THE FLAT
    4. CUTTING THE TRANSITIONS OUT
    5. STAIN THE TRANSITION
    5.) Transition Studs
    6. BUILD THE TRANSITIONS
    Art
    Half Pipe
    New Designs

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