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I would say that you have got it the wrong way around and should dig the hole around 8" shallower than the depth of the trampoline to allow the air to escape from underneath the perimeter skirt.
To retain the soil around the perimeter of the trampoline we made a series of softwood planked panels that were fixed to the galvanised tubular legs of the trampoline by drilling holes through and using threaded stud bar. When a complete frame was made around the perimeter of the trampoline we wrapped a layer of weed-supressing membrane around it to keep the fine particles out.
What I will say is that there is a noticable deadening of the trampoline's bounce once it is sunken as opposed to being in the air on it's tubular legs. This is unavoidable but I think the aesthetic and safety advantages outweigh the disadvantages, so do it!
Our trampoline was dug into solid chalk and we used a JCB 3CX Sitemaster to do it.
thanks for the info on that.
david beasley said:
Hi everyone, we have been asked to provide a quote to sink a 10 foot trampoline. The link at the start of this thread doesn't appear to work. Can anyone give us any pointers for this? many thanks.
First you dig a hole
Then you test it
The you drop it in simples
I have a client with a trampoline sunk in, with hollow-block sides. It's filled up with water this year, smells awful and has midges breeding in it. Please incorporate proper drainage, you're essentially digging a stagnant pond if you don't!
Think we are going to leave the quote. Got other projects lined up that we are more enthusiastic/knowledgeable about. Thanks for the replies.
Paul McNulty said:
One in whitehead garden and the other in Crumlin garden.
In one the storm water system was deep enough to connect to, and in the other I used a sump pump from a lower collection point to pump any excess water into the storm water system as and when it built up. Never just dig a hole and hope it works! And as a precaution drainage in the outside of the wall would be beneficial, ground conditions dependant.
In terms of the trampoline pits I can send you on the construction details of how I did these pits if that helps.