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Wild Trail setups
Ruben José:
--- Quote from: zane;3602974 ---So they concreted the jumps? Crazy.
Lol@ the dog knocking over the camera too.
--- End quote ---
It's a good ideia against kids destroying your jumps.
@ss4oLe:
There's a set of trails around here that has a entire line of 5 jumps, one berm and one roller that is cement. The dirt isn't the kind that would set up well as it has lots of sand/organic material (I"m not a technical dirt expert, i just know the dirt doesn't pack/stay packed)
The locals did a VERY good job of using cement and the jumps ride amazingly.
I'm pretty sure they're doing this to some extent at Catty* in the berms.
* I know they are using cement in some east coast/PA trails.
NZ_BMXER:
You dont even need to use the amount of concrete these guys are. I've used a concrete a bit before and I normally only use two shovel of concrete to about a 3/4 barrow. that way it's solid but can still be changed.
From what I saw at catty they use way more concrete that what i'd do (they've done a berm and two lips) but then again they get crazy freeze and thaw cycles there so they have to use a high concrete to clay ratio for it to hold up to the freeze.
More concrete = stronger but less changeable so you need to get it right first time.
Brendan O.:
But if you for example get lots of rain that might drain (not necessarily all) the soil from under the concrete. Then you just end up with a thin hollow cement lip that will crack easily right? How durable is a concreted lip/jump?
@ss4oLe:
If done correctly, a concrete lip is as durable as a skatepark lip/bowl.
I know people that used chicken wire/rebarr and made a cement quarter in the woods. That's kind of overkill but they wanted it to last for years and it's still there today(10 years later)
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