Quick Decking Questions!

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18 Oct 2002
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Hi Folk,

Ive been sitting in crappy garden today thinking about projects.

I think I want to a deck at the far end of it, just to give us a space to sit when the summer rolls around (yeah right).

Basically, question is that floor is uneven, its a mix of concrete and soil and the soil is the higher part, the deck itself will be flat, but front part of the deck will have longer posts and will sit on concrete flooring. Both Soil and Concrete portions are fairly level. Am I right in thinking that I can construct the outer frame using joists and use legs in the corners to get the basic height right? the legs will be around 25 CM's on the concrete portion to keep the deck flat.

The legs that would sit on the concrete, do these need to be fixed to the floor? From what I have read the legs/posts in the soil will need to be postcreted in? oR can they sit on old slabs I have lying around?

Also what size of joist should I use? The deck is roughly 4.5m square, Ive been offered 4.8 m joist (4"*2") for £8.50, and 6"*2" for £12.50, im on a budget so it would be nice to shave a few quid off! Out of interest could the outer frame be 6*2 and the inner joists be 4*2? or is that just a stupid idea:p

Lastly Ive been quoted £8.50 for the deck boards, that's for a 4.8m length and is a delivered price.

Any advice greatfully received, and don't be shy in telling my I haven't got a clue.
 
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Lastly Ive been quoted £8.50 for the deck boards, that's for a 4.8m length and is a delivered price.

That's a great price.

4x2 would need more supports in place to take the wobble out of the deck. I'd personally pay a bit more and go for the 6x2 and have a nice solid deck. It'll save you having to concrete in more supports, so should work out cheaper.
 
That's my thinking aswell now. Whats best to use for supports, will the joist off cuts be ok to use as legs, I have got some fence posts that I could use.
 
100mmx100mm fence posts would be ideal for the corners, but you could just screw 2 of the joist offcuts together and use them.
 
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Guys, just one last question on fixing the frame supports to concrete, about 1/3 of the supports will sit on soil so they will be concreted in, the remainder 2/3 will sit on a mix of well set slabs and a solid concrete, what can I use to bolt the supports to the slabs and concrete?
 
Guys, just one last question on fixing the frame supports to concrete, about 1/3 of the supports will sit on soil so they will be concreted in, the remainder 2/3 will sit on a mix of well set slabs and a solid concrete, what can I use to bolt the supports to the slabs and concrete?

Those are for freshly poured concrete, think he's using existing slabs/flooring.

He mentioned some will be concreted in,so that's the link I gave, forgot to add the other link below.:o

http://www.toolstation.com/shop/Lan...t+Down+Post+Shoe+75+x+75mm/d130/sd3224/p42734
 
I'd just use a couple of galvanised angle brackets and screw into the legs and bolt into the slab. It's not going to move I wouldn't have thought. I think they have to fix decks down securely in certain places in the US due to hurricanes, but should be fine here.
 
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