Quote:
Originally Posted by Tandum
Steve, you might wanna check your maths.
There is no way you'll fit a cubic meter of concrete in a 300mm tube unless it's about 6 meters tall.
|
LOL fail maths.. ur dead right.. 60cm high and 300 wide is about .42 cubic
Quote:
Originally Posted by pmrid
Whether you build some concrete formwork for a full or partial concrete pier, or just do a straight steel number like Steve's, you will still need to lay a solid concrete base for the whole thing. A block of concrete a metre deep and say 400x400 will be less than 1/4 m3. I'd do it with bags of premix. Work on about 15 bags worth. I think they're about $10 a bag these days. And you have the additional option here of getting a longer bit of steel pipe and burying it (with suitable bits of steel welded to the foot to make it solidly anchored in the concrete base - eliminating the baseplate and associated bolts involved in Steve's design. Of course you don't have the option of removing it later on - apart from digging the whole thing up again.
I have one pier that is of this kind and it's rock solid. I also have one that is a store-bought steel one bolted into a slab. Both are rock solid. One cost me $1000 plus the concrete base. The other cost me the same amount of concrete base and the rest was less than $100 in scrap steel pipe. I know which was I'm going next time (there's always a next time).
Peter
|
This is quite a good idea. Ive always been in the habit of over engineering stuff.
After reading everyone comments on this.
I think I will go 4 Star pickets driven into the ground to reduce change of the ground around the block dissapearing and the block starting to move/shake if pushed.
400 x 400 x 1m block poured on the star pickets reinforced with rebar
4 m16 threaded rods with their ends bent welded to the rebar, these bolts will be used to attach the steel pier
steel from direct for $100
Should i put styrofoam around the sides of it to isolate it from the ground or is just isolating it from the pad ok?
and yes I partly have hijacked Helo (peters) thread. I'm asking the same question as him