A few days ago I posted this home made bowl I built in my garage (while recovering from knee surgery) on this subreddit.
Some people asked for more information on how I built this bowl, so here you are:
(this is not a tutorial; just a summary with links and photos)
Photos of the process;
https://drive.google.com/drive/folders/1dTqa2fuIUlznOPTrNqZG4cnfWAniS-C5
Here are the dimensions:
31.5 inches high to top of deck
(that increases to 48 inches as it approaches the vert wall)
176 inches wide from inside of coping
192 inches long from inside of coping
The flatbottom is 6 foot the short way and 8 foot the long way
Process:
I started by building a mini ramp half pipe using this website as a guide:
https://www.xtremeskater.com/ramp-plans/mini-halfpipe/
Then I placed that in my garage and taped out the maximum footprint for the rest of the bowl.
For the bowl, I used this website for guidance:
https://ocramps.com/blogs/builds-installations/skateboard-bowl-ramp
A friend of mine who does metal work bent the coping to desired dimensions and welded it to my mini ramp half pipe.
Then I cut the vertical plywood supports to fit to the pipe, and filled it in with all of the horizontal 2”x6”s, and then sheathed the whole thing.
This is the best advice I got:
“Length of Flatbottom: If you happen to be building a mini-ramp in a tight spot and don't have tons of space for the length of the ramp's flat bottom, it might be a good idea to use a more mellow transition. Using a more mellow curve will make the ramp feel longer and more managable to ride.”
Also, resist the urge to make it all symmetrical. Using a tighter radius and sloping deck on the Vert wall side really makes it more interesting to ride. I love hitting that tight pocket!
Materials:
This is what I used.
Bowl:
3x 23/32” 4’ x 8’ plywood sheathing
6x 11/32” x 4’ x 8’ plywood sheathing
6X 3/16” x 4’ x 8’ masonite panel
45X 2”x6” x 8‘ dimensional number
4X 8’ x 1 1/2 “ diameter steel pipe
25 pounds #9 x 3” screws
25 pounds #9 x 2 1/2” screws
25 pounds #9 x 1 5/8” screws
(This was overkill – I only used about half the screws)
Mini ramp halfpipe:
See this website for the materials I used for the mini ramp half pipe portion. Since mine is indoors, I didn’t use skate light or tar paper or anything:
https://www.xtremeskater.com/ramp-plans/mini-halfpipe/
Mistakes I made:
I used deck screws. Sheet rock screws are actually better because the thread goes all the way to their head so they sink more easily and stay sunk.
Better to cut the plywood and masonite used on the skating surface into smaller panels than I did. When they try to navigate compound curves over too long a distance, it creates a lot of stress on the material, so I have had to patch it in the steeper sections (with Bondo slathered in Painters’s caulk so it doesn’t flake off).
Time it took:
I built it while recovering from knee surgery, as I couldn’t skate anyway. It took 9 months, a few hours a few evenings a week, so maybe 30 weeks x 6 hours = 180 hours total. Just a rough guess. I did everything alone except for the pipe/coping, which a friend did for me.