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koicarp · Joined: 03 Apr 2008 Posts: 2 Location: UNITED KINGDOM

I AM BUILDING A RAISED FORT FOR NURSERY CHILDREN AND I AM USING 4 INCH ROUND POSTS AS SUPPORTS THE FORT PLATFORM WILL BE THREE FET OFF THE FLOOR I HAVE UG THE POST HOLES FOUR FEET DEEP BUT I AM CONCERNED THAT WHEN I CONCRETE THEM IN THAT IF THEY ROT OFF IN 10 OR 15 YEARS I WILL HAVE TO REPLACE THEM SO I AM GOING TO CONCRETE 4 INCH SOIL PIPE INTO THE HOLES AND THEN DROP THE POSTS IN TO THESE THAT WAY IF THERE ARE ANY PROBLEMS IN THE FUTURE THEN I WILL BE ABLE TO REMOVE THEM THE POSTS FIT SNUGLY INSIDE THE SOIL PIPES WHAT IS YOUR ADVICE

thescruff · Moderator Joined: 03 May 2003 Posts: 4249 Location: Bath

I think you should put something at the bottom that allows the water to run out.

I hear there's loads of regulations with what you are doing, and I would seek advice from the building dept, just to satisfy them and your public liability insurance.

Oh and take the caps lock off. Rolling Eyes

koicarp · Joined: 03 Apr 2008 Posts: 2 Location: UNITED KINGDOM

Thanks for the reply i am going to put a silicone bead around the top were the post mets the concrete also if there is any space around the post i would be able to pour wood preservative into the tube and allow it to soak i am going to sit the post and plastic sol pipe sleeve on a small piece of broken paving slab so it will allow concrete to flow under the post giving it a strong base to sit on wat do u think sorry about caps lock

thescruff · Moderator Joined: 03 May 2003 Posts: 4249 Location: Bath

All sounds ok, but as I say there are lots of health and safety issue, which you really must check out