Introduction: Concrete Fingerboard Skate Park

This is a super simple project that has been a huge hit. Here's a quick overview. Check it.

Our nephew wanted a TechDeck half-pipe for his birthday this year. We thought we'd kick it up and build him his very own real concrete fingerboard bowl park. The goal was to create a unique park from materials we had on hand. At 60 lbs., this park weighs a wee bit more than our nephew.

Materials:
tub/form (we used scrap 3/4" plywood and spray glued some plastic film to it)
bowl(s)
caulking
styrofoam
ready-mix concrete
spray silicone or some type of mold release
and of course, duct tape

Step 1: 1. Create the Form

Create a negative mold of your desired park shape.

We built a tub from scrap 3/4 plywood and spray glued some plastic film to it. To create the bowl shapes, we used 1 larger wooden bowl and 2 smaller glass bowls. The transitions/gaps where shaped from a few chunks of styrofoam and duct tape.

Note: The mold needs to be smooth, so the concrete can release when cured.

We used caulking to make smooth transitions and rounded corners. Use your finger and a little water to smooth out generous beads/globs of caulking. Let the caulking dry overnight before pouring concrete.

Step 2: 2. Pour Concrete

Mix and pour the ready-mix concrete.

We used a full 60lb. bag of basic post concrete mix since we had that on hand. It worked ok, but cracked because the form was too thin (specs state minimum of 2" thick). The trick to a smooth final finish to knock all of the air bubbles out. We tamped everything well with a small stick. Then we beat on the outside of the form with a hammer. You will see the bubbles rise to the surface. Let sit for at least 24 hours. (we rushed it and cracked the main bowl. as an easy fix, we glued the pieces to plywood with liquid nailsback in business)

Step 3: 3. Remove Form

Carefully remove your form. If you have any cracks or bubbles, fill with non-sanded grout or other concrete patch/filler.

Add the finishing details like:
-stickers
-coping
-rails
-extensions
-etc

Step 4: 4. Shred!

"Cannon Ball Park" in action:

Comments

author
Ben DangerH (author)2017-02-19

I love this, inspired

author
danx_the_drummer (author)2012-05-29

that is for play with Beyblades YA-HA!!!!

author

that's a great idea! thanks.

author
PotatoCoffee (author)2012-02-28

Very good job, Nice deck!

author
reref (author)2012-01-25

Nice one. Five stars!

author
dylankunaikennedy (author)2011-07-23

did you make the banana board tech deck or buy it? plz respond

author

it was purchased

author

where and how much?

author

target/ toys r us for like $5 but idk if they still carry them

author

sorry I don't know. it is my nephew's.

author

o ok thanks anyway

author
Sakrete (author)2011-03-18

Excellent Instructable. Great choice of Concrete :)

author
tech deck123 (author)2011-01-23

awsome looooool

author
splatman (author)2011-01-13

Reinforcing it with mesh would help. Use poultry netting or hardware cloth, shaped to follow the contours on top. When pouring the concrete, make sure the mesh/netting is not in contact w/ the mold, so it won't show in the finished product.
Another layer of mesh along the bottom, and/or some rods, to reinforce it from the bottom as well.
One way to use less 'crete, (and make it lighter too,) is hide chunks of Styrofoam in the thick parts. Just make sure they don't surface when you tap the mold during the air-purge routine. Tying them to the mesh may help. Another way is to screw small boards across the top of the mold, with legs holding down the Styro-chunks thru the 'crete. When done air-purging, unscrew said boards, remove the legs, and fill in their "footprints".
Or let the Styro-chunks surface (cut holes the bottom re-mesh for this), and remove them after the 'crete's set.
If you wish to reduce the amount of 'crete needed (or get more volume), but don't care about weight, use rocks from your backyard in place of the "Styro-chunks".

You can make your concrete a different color by using pigment. Pigment may be pricey, so you may want to leave that out.
http://www.directcolors.com/concretepigment/
or buy it at a hardware store.

author
toiletmamba (author)2010-12-14

lol looks beast

author
Plan0 (author)2010-09-07

dude this is freakin awsome, think you could make anything else out of concrete?

author
gl0rious (author)2010-09-01

were did you get that wicked 80s board?!!??

author
Jebotepatak (author)2010-05-12

Wonderful work masters just wondering how heavy is the concrete park?
This would be a perfect excuse to buy a tech deck!! =)

Thank You
 

author
GianniMora (author)2010-04-20

 thts pretty sick!!


                  -M

author
andrewdover (author)2009-05-03

You guys rock. One of the best instructables I've ever seen......I love those Banana Board or Old School Skateboard TECH DECKS!!!

author

I have a banana board for sale 15$ 5 plies of veneer, cross plied, 3 birch, 2 african mahogandy

author
munger17 (author)dcfingerboards2010-02-05

 ill by it

author

ok. how and where?

author
M4industries (author)DungMachine2009-10-22

You can have it DungMachine
But seriously I want one of those!

author
roge (author)2010-01-07

this is so cool just finished making one

author
peterthomsen (author)roge2010-01-07

 right on. i'd love to see photos. can you add a pic to the comments here?

author
NickZa (author)2010-01-06

hey this looks good, i like it :D

author
valoskater8745 (author)2009-12-27

 nice like rice

author
baramunchies (author)2009-03-24

did you pour the concrete again and a bit thicker? seems like making the mold is most of the work.

author
raymond123 (author)baramunchies2009-03-27

can you buy me a tech deck

author
cambigfoot (author)raymond1232009-12-04

WTF

author
legano (author)raymond1232009-12-02

i got like, 10 for $2 each at Toys R Us in the bargain bin, i don't think you need people to buy them for you :\

author
ultrauber (author)raymond1232009-08-25

randomSausage

author
sharlston (author)raymond1232009-05-04

buy 1 ur sen

author
dombeef (author)raymond1232009-04-05

Huh?

author
changuito07 (author)2008-11-06

too hard

author
mrdepo96 (author)changuito072009-10-22

 what did you expect? Great instructible!

author
Aleksandr Skotbot (author)2009-09-21

10 years ago or so, I had a tech deck with the trucks removed and the bottom coated in felt, so I could play with it in school. (:

author
DungMachine (author)2009-08-24

I like it. I would make it. if only I had cement...

author
roboff (author)2009-08-09

very cool if u have the cement

author
baramunchies (author)2009-03-24

some steel reinforcement would have helped, but i guess you know that by now.

author
Alex McCown (author)baramunchies2009-06-14

yah concrete is strong ... vertically ... week horizontally with out rebar

author
tj the gnome (author)2009-04-28

That's an awesome song in that video.

author
experiencefb12 (author)2009-03-10

wow you guys are geniuses. that looks really fun and would be killer with a few rails.

author
mman1506 (author)experiencefb122009-03-22

yah use some bent metal rod

author
Derin (author)2008-12-24

The concrete probably cracked because it was not watered...You have to pour water over concrete as it cures.At least that was what my grandfather who used to be a contractor.

author
junits15 (author)Derin2009-01-07

that is correct, the water cools the concrete making it cure slower making a better whatever it is you are making:)

author
Derin (author)junits152009-01-08

I did not know why the watering helped,so thanks.

author
brock da diy man (author)2008-12-22

how mutch did I weigh??? I'm going to build one but I don't want it to be too heavy.

author

it is a full 60 lb bag of concrete

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