sinking a trampoline

I’ve heard many varying reports on how one should or can sink a trampoline. In my honest opinion logically, in reality and in fact, unless it’s a wee trampoline for a leprechaun, there is only one real vorsprung durch technic method of doing so. I did this as one part of a bigger picture where, I should add, works are still in progress.

Before you get to crater creations, choose your trampoline. Buy once, buy well, buy right and buy this before you dig. In this case the trampoline is [by specification] 14′ foot diameter. Spot chosen, the central point is found and the hole is dug. Note: not recommended you do this by hand, brutal soil or not. There is a fine reason why I note this.

trampoline sinking

Approximately 40 tonne came out of this soil sided cylinder and *if Irish rainfall weather does not work in your favour, it will fill up and depending, the walls can/ may/ most probably will collapse. You may say it didn’t. I say that is one heck of a gamble.

Levels sorted below ground level, distances and levels are checked at almost every interval. Foundations were then laid and whacked, yes, with the whacker [compaction plate]. Once the base set, it was straight onto the first course of cavity blocks.

The cavity blocks and foundations had rebar/ steel set into them and once we got to the top level into that then is poured concrete. In short, this is known as a retaining wall. We chose to cap them off with a solid block on its flat.

Allowing time for the concrete in the walls to dry, we returned to level the soil about 7 days later. Weather dependent, you will need this. Any sooner and the weight of the machine plus the weight of the soil against wall may cause it to cave in. Not an option. The base of the pit made allowances for a sump/ drainage pump to be put in place and the base of the pit was brought to foundation level with stone for drainage. After that the trampoline is put into its new home.

The trampoline was planted after with a dwarf type bamboo to surround it. I like the way this dapples the matt black saftey net. Of note, flick back up to the top of the post and see the difference in the height versus the wall.

I’ll get a better picture of the trampoline set in place, but for now this will have to suffice. Questions or queries, leave a comment or….

Contact Peter

UPDATE: 3rd July 2012 – Trampoline Safety Netting