ok i need help building a strong jump, usualy i just make 1ft high jumps but after a wile they are half the size, i throuw logs and sticks under and then put dirt over it , patt it down and spray water on it and let i harden during the night. how do you guys (withought heavy machinery or plows)Text build your jumps. my neighbor said that if you put hairspray on it it works great keeping it together , is this true. please tell me how to make a decent jump!

 

I used to build BMX jumps in my back yard and did everything you did but make sure you use black dirt and spray it with water. If that doesnt work get some kind of dirt with rock in it, it will be a lot rougher but will hold up a lot better, this kind of stuff is what I built jumps for the quads with. Nothing is worse to use then sand.

 

No logs or sticks. They just move and cause the ramp to fall apart.

Keep 4X4s off your jumps

Never ride over your jumps.
Build up in layers and get a tamper from Home Depot that is used to tamp underneath of patio pavers. It has a flat 8" by 8" square on the bottom.

There is a white powder you can add to soil but I can't remember what it is. I don't think it is lime. They use it when building the bed for a new road before it is paved. Somebody else might know. I have added concrete straight to the dirt and this works too but it is more expensive. The concrete will harden from the moisture in the soil and humidity. You can wet it some if you need. I learned this when building barn floors for cattle while I was in college. We used to use a rototiller to mix the concrete in with the dirt and then level it. It was great because it was rough so the cattle didn't slide like they do on regular concrete.

/Jon

 

if u want chap balck dirt.. my dad has about 5 dump truck loads.. or more for sale.. u need to haul it away tho.. i never thoghut about doing it with black dirt.. o well gotta try it.. warrior rider 01 i see your from aurora IL maybe sometiem we can hookup and ride?